| 1. |
- Cederwall, Bo, et al.
(författare)
-
Evidence for a spin-aligned neutron-proton paired phase from the level structure of 92Pd
- 2011
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 469:7328, s. 68-71
-
Tidskriftsartikel (refereegranskat)abstract
- Shell structure and magic numbers in atomic nuclei were generally explained by pioneering work(1) that introduced a strong spin-orbit interaction to the nuclear shell model potential. However, knowledge of nuclear forces and the mechanisms governing the structure of nuclei, in particular far from stability, is still incomplete. In nuclei with equal neutron and proton numbers (N = Z), enhanced correlations arise between neutrons and protons (two distinct types of fermions) that occupy orbitals with the same quantum numbers. Such correlations have been predicted to favour an unusual type of nuclear superfluidity, termed isoscalar neutron-proton pairing(2-6), in addition to normal isovector pairing. Despite many experimental efforts, these predictions have not been confirmed. Here we report the experimental observation of excited states in the N = Z = 46 nucleus Pd-92. Gamma rays emitted following the Ni-58(Ar-36,2n)Pd-92 fusion-evaporation reaction were identified using a combination of state-of-the-art high-resolution c-ray, charged-particle and neutron detector systems. Our results reveal evidence for a spin-aligned, isoscalar neutron-proton coupling scheme, different from the previous prediction(2-6). We suggest that this coupling scheme replaces normal superfluidity (characterized by seniority coupling(7,8)) in the ground and low-lying excited states of the heaviest N = Z nuclei. Such strong, isoscalar neutron-proton correlations would have a considerable impact on the nuclear level structure and possibly influence the dynamics of rapid proton capture in stellar nucleosynthesis.
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| 2. |
- Hadinia, Baharak, et al.
(författare)
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First identification of excited states in 106Te and evidence for isoscalar-enhanced vibrational collectivity
- 2005
-
Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 72:4, s. 041303-1-041303-5
-
Tidskriftsartikel (refereegranskat)abstract
- Gamma-ray transitions in the extremely neutron-deficient nucleus Te-106 have been identified for the first time. The experiment utilized the Fe-54(Fe-54,2n)Te-106(*) reaction, and the gamma-ray transitions from excited states in Te-106 were selected by use of the recoil-decay-tagging technique. The production cross section was estimated at 25 nb, a new limit for in-beam gamma-ray spectroscopy. A ground-state band tentatively extending up to I-pi=10(+) is proposed. The systematics of low-lying yrast states in the Te isotopes is discussed within the context of vibrational excitations and residual nucleon-nucleon interactions.
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| 3. |
- Hadinia, Baharak, et al.
(författare)
-
First identification of gamma-rays in Te-106 using recoil decay tagging technique
- 2006
-
Ingår i: Frontiers in Nuclear Structure Astrophysics, and Reactions: FINUSTAR. - MELVILLE, NY : AMER INST PHYSICS. - 0735403236 - 9780735403239 ; , s. 457-459
-
Konferensbidrag (refereegranskat)abstract
- Gamma-ray transitions from excited states in Te-106 have been identified using the recoil decay tagging technique. The experiment which was the reaction Fe-54(Fe-54,2n)Te-106* was performed at the JYFL accelerator facility at the University of Jyvaskyla, Finland. The production cross section was estimated at 25 nb, a new limit for in-beam gamma-ray spectroscopy. A tentative level structure for the ground state band of Te-106 is proposed.
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| 4. |
- Hadinia, Baharak, et al.
(författare)
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In-beam gamma-ray and alpha-decay spectroscopy of 170Ir
- 2007
-
Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 76:4, s. 044312-1-044312-8
-
Tidskriftsartikel (refereegranskat)abstract
- Excited states in the highly neutron deficient odd-odd nucleus Ir-170 have been investigated. The experiment was performed using the Sn-112(Ni-60, pn)Ir-170 reaction and employing the recoil-decay tagging technique. Gamma rays were detected using the JUROGAM gamma-ray spectrometer and those belonging to Ir-170 were selected based on recoil identification provided by the RITU gas-filled recoil separator and the GREAT spectrometer at the RITU focal plane. A partial level scheme of Ir-170 is presented for the first time. New alpha-decay branches are assigned to Ir-170 and a tentative level structure for Re-166 is deduced from a study of the alpha-decay fine structure and the associated alpha-gamma correlations.
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| 5. |
- Sandzelius, Mikael, et al.
(författare)
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First identification of excited states in 169Ir
- 2007
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 75:5, s. 054321-
-
Tidskriftsartikel (refereegranskat)abstract
- Gamma rays populating the alpha-decaying isomeric state in Ir-169 have been observed for the first time. The experiment employed the recoil-decay tagging method using the JUROGAM gamma-ray spectrometer, the RITU gas-filled recoil separator and the GREAT spectrometer located at the RITU focal plane. The gamma-ray cascade feeding the isomeric alpha-decaying state exhibits a rotational structure consistent with a h(11/2) proton coupled to a triaxially deformed core. The experimental results are compared with predictions from total Routhian surface calculations.
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| 6. |
- Al-Khatib, A., et al.
(författare)
-
High-spin states in Ba-124
- 2005
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Ingår i: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 36:4, s. 1029-1032
-
Tidskriftsartikel (refereegranskat)abstract
- High-spin states in Ba-124 were populated using the Ni-64 (Ni-64,4n) Ba-124 reaction at beam energies of 255 and 261 MeV. Gamma-ray coincidences were measured using the EUROBALL detector array. The charged-particle detector array DIAMANT provided channel selection. The previously known rotational bands are extended to higher spins. Five new hands are observed, one of them extends up to the spin 40h region.
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| 7. |
- Andgren, Karin, et al.
(författare)
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Low-spin collective behavior in the transitional nuclei Mo-86,Mo-88
- 2007
-
Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 76:1, s. 014307-
-
Tidskriftsartikel (refereegranskat)abstract
- Low-spin structures in Mo-86,Mo-88 were populated using the Ni-58(Ar-36, x alpha yp) heavy-ion fusion-evaporation reaction at a beam energy of 111 MeV. Charged particles and gamma rays were emitted in the reactions and detected by the DIAMANT CsI ball and the EXOGAM Ge array, respectively. In addition to the previously reported low-to-medium spin states in these nuclei, new low-spin structures were observed. Angular correlation and linear polarization measurements were performed in order to unambiguously determine the spins and parities of intensely populated states in Mo-88. Quasiparticle Random Phase Approximation (QRPA) calculations were performed for the first and second excited 2(+) states in Mo-86 and Mo-88. The results are in qualitative agreement with the experimental results, supporting a collective interpretation of the low-spin states for these transitional nuclei.
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| 8. |
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| 9. |
- Autio, Hanna, et al.
(författare)
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Historically Based Room Acoustic Analysis and Auralization ofa Church in the 1470s
- 2021
-
Ingår i: Applied Sciences. - : MDPI. - 1454-5101 .- 2076-3417. ; 11:4
-
Tidskriftsartikel (refereegranskat)abstract
- Worship space acoustics have been established as an important part of a nation’s cultural heritage and area of acoustic research, but more research is needed regarding the region of northern Europe. This paper describes the historical acoustics of an important abbey church in Sweden in the 1470s. A digital historical reconstruction is developed. Liturgical material specific to this location is recorded and auralized within the digital reconstruction, and a room acoustic analysis is performed. The analysis is guided by liturgical practices in the church and the monastic order connected to it. It is found that the historical sound field in the church is characterized by the existence of two distinct acoustical subspaces within it, each corresponding to a location dedicated to the daily services of the monastical congregations. The subspaces show significantly better acoustic conditions for liturgical activities compared to the nave, which is very reverberant under the conditions of daily services. Acoustic transmission from the two subspaces is limited, indicating that the monastic congregations were visually and acoustically separated from the visitors in the nave and each other.
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| 10. |
- Bygdéus, Pia, 1963-, et al.
(författare)
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Legitimitet och närvaro i klostersång
- 2019
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Ingår i: Musikforskning idag 2019, Göteborgs universitet, 12–14 juni 2019. - : Svenska samfundet för musikforskning. ; , s. 12-12
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- 2016 initierades ett samarbete mellan benediktinklostret Mariavall och Bygdéus/Strinnholm Lagergren. De 15 nunnorna önskade förbättra sitt sångsätt och repertoaren önskades få nytt syre, förbättras och arbetas med. I denna presentation demonstreras och presenteras några av de viktigaste resultaten från detta pågående arbete utifrån frågor om förändringsprocess, praktik och repertoar där åhörarna delvis själva får delta. Uppdraget att arbeta med kommuniteten har kommit att paras med ett syfte där Bygdéus/Strinnholm Lagergren studerar hur en sjungande grupp som lever i en avskild miljö förändrar sin sångliga praxis och förändringsprocesser i den. Metoden har bestått i aktivt repetitionsarbete med kommuniteten med efterföljande reflektion, fotodokumentation och portföljskrivning. Projektet är inne på sitt tredje år med besök en gång i halvåret under tre dagar vardera. Portföljskrivning har inneburit att systrarna besvarat samma frågor i slutet av två övningstillfällen per dag under tre dagar. Portföljsvaren är individuella. Systrarnas reflektioner finns insamlat kring de många olika moment, teman och systrarnas individuella uppfattning om det gemensamma arbetet vilka sedan tematiserats. I materialbearbetningen av portföljskrivning blir särskilt följande kategorier tydliga: akustiken och rummet, upplevelsen av gemensam sång, olika attityd till sång innanför och utanför liturgin, förflyttningar, varierande uppställningar och kroppspositioner, lyssnande under sång, samtidighet i sången, rädslor. Repertoarmässigt finns en önskan sedan projektets start att sjunga mer på latin, mer gregorianik, särskilt i mässans inledande sång introitus. Allt eftersom har arbetet även kommit att omfatta andra delar av den liturgiska musiken samt sånger som inte alls används i liturgin men har sociala och sångtekniska aspekter för det individuella såväl som kollektiva arbetet med rösten och sång i grupp. Generellt framträder ett mönster där systrarna vill hitta ett personligt förhållningssätt till en tradition med lång historia utan att förlora sin egen identitet.
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| 11. |
- Bäck, Torbjörn, et al.
(författare)
-
First observation of gamma-rays from the proton emitter Au-171
- 2003
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Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 16:4, s. 489-494
-
Tidskriftsartikel (refereegranskat)abstract
- Gamma-rays from the alpha- and proton-unstable nuclide Au-171 have been observed for the first time. The gamma-rays were correlated with both a proton- and an alpha-particle decay branch, confirming that the nucleus decays by alpha and proton emission from a single (11/2(-)) state. The measurement confirms the previously determined half-lives for these particle decays but the present values are of higher precision. In addition, a longer half-life than determined in previous work was measured for the proton-unstable tentative ground state. The results are discussed in relation to structures in neighbouring nuclei and compared with a Strutinsky-type TRS calculation.
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| 12. |
- Bäck, Torbjörn, et al.
(författare)
-
Spectroscopy of the neutron-deficient nuclide Pt-171
- 2003
-
Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 17:1, s. 1-5
-
Tidskriftsartikel (refereegranskat)abstract
- A number of previously unobserved gamma-rays emitted from the neutron-deficient nuclide Pt-171 have been identified using the recoil decay tagging technique. The level scheme has been updated using information from gamma-gamma coincidences and angular distribution measurements. To further confirm the assignments of the gamma-rays to Pt-171, the events were correlated with the alpha-decay of the daughter nucleus Os-167.
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| 13. |
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| 14. |
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| 15. |
- Gadea, A., et al.
(författare)
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Observation of Ni-54 : Cross-conjugate symmetry in f(7/2) mirror energy differences
- 2006
-
Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 97:15, s. 152501-
-
Tidskriftsartikel (refereegranskat)abstract
- Gamma decays from excited states up to J(pi)=6(+) in the N=Z-2 nucleus Ni-54 have been identified for the first time. Level energies are compared with those of the isobars Co-54 and Fe-54 and of the cross-conjugate nuclei of mass A=42. The good but puzzling f(7/2) cross-conjugate symmetry in mirror and triplet energy differences is analyzed. Shell model calculations reproduce the new data but the necessary nuclear charge-dependent phenomenology is not fully explained by modern nucleon-nucleon potentials.
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| 16. |
- Hadinia, Baharak, et al.
(författare)
-
First identification of gamma-ray transitions in 107Te
- 2004
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 70:6, s. 064314-1-064314-4
-
Tidskriftsartikel (refereegranskat)abstract
- Gamma-ray transitions in Te-107 have been identified for the first time. The experiment, which utilized the recoil decay tagging technique, was performed at the accelerator laboratory of the University of Jyvaskyla, Finland. Prompt gamma rays produced in Ni-58(Cr-52,3n)Te-107(*) reactions were detected by the JUROGAM gamma-ray spectrometer. The gamma rays belonging to Te-107 were selected based on the recoil identification provided by the RITU gas-filled recoil separator and the GREAT focal plane spectrometer. A first excited state at 90 keV, tentatively of g(7/2) character, is proposed.
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| 17. |
- Herskind, B., et al.
(författare)
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Charged particle feeding of hyperdeformed nuclei in the A=118-126 region
- 2006
-
Ingår i: Physica Scripta. - 0031-8949 .- 1402-4896. ; T125, s. 108-114
-
Tidskriftsartikel (refereegranskat)abstract
- A breakthrough was recently obtained in the analysis of the so-called Hyper-Long-HyperDeformed (HLHD) experiment made at the EUROBALL-IV gamma-detector array (EB). The Ni-64 + Ni-64 double right arrow Ba-128* fusion reaction was studied at E-beam = 255 and 261 MeV, reaching the highest angular momentum that the compound nuclei can accommodate. To date no discrete HD rotational bands have been identified. However, rotational patterns in the form of ridge-structures in three-dimensional (3D) rotational mapped spectra are identified with dynamic moments of inertia J((2)) ranging from 71 to 111h(2) MeV-1 in 12 different nuclei selected by charged particle- and/or gamma-gating. The four nuclei, Te-118, Cs-124, Cs-125 and Xe-124 found with moment of inertia J((2)) >= 100h(2) MeV-1, are most likely hyperdeformed, the remaining nuclei with smaller values of J((2)), are considered to be superdeformed, in qualitative agreement with recent theoretical calculations.
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| 18. |
- Herskind, B., et al.
(författare)
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Light charged particles as gateway to hyperdeformation
- 2007
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Ingår i: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 38:4, s. 1421-1430
-
Tidskriftsartikel (refereegranskat)abstract
- The Euroball-IV gamma-detector array, equipped with the ancillary charged particle detector array DIAMANT was used to study the residues of the fusion reaction Ni-64 + Ni-64 double right arrow Ba-128 at E-beam. = 255 and 261 MeV, in an attempt to reach the highest angular momentum and verify the existence of predicted hyperdeformed rotational bands. No discrete hyperdeformed bands were identified, but nevertheless a breakthrough was obtained through a systematic search for rotational ridge structures with very large moments of inertia J(2) >= 100 h(2) MeV((-1)), in agreement with theoretical predictions for hyperdeformed shapes. Evidence for hyperdeformation was obtained by charged particle + gamma-ray gating, selecting triple correlated ridge structures in the continuum of each of the nuclei, Te-118, Xe-124 and Cs-124,Cs-125. In 7 additional nuclei, rotational ridges were also identified with J(2) = 71-77h(2) MeV((-1)), which most probably correspond to superdeformed shape. The angular distributions of the emitted charged particles show an excess in forward direction over expectations from pure compound evaporation, which may indicate that in-complete fusion plays an important role in the population of very elongated shapes.
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| 19. |
- Ideguchi, E., et al.
(författare)
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High-spin intruder band in In-107
- 2010
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 81:3, s. 034303-
-
Tidskriftsartikel (refereegranskat)abstract
- High-spin states in the neutron-deficient nucleus In-107 were studied via the Ni-58(Cr-52,3p) reaction. In-beam gamma rays were measured using the JUROGAM detector array. A rotational cascade consisting of ten gamma-ray transitions, which decays to the 19/2(+) level at 2.002 MeV, was observed. The band exhibits the features typical for smooth terminating bands that also appear in rotational bands of heavier nuclei in the A similar to 100 region. The results are compared with total Routhian surface and cranked Nilsson-Strutinsky calculations.
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| 20. |
- Ideguchi, Eiji, et al.
(författare)
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Superdeformation in 91Tc
- 2000
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Ingår i: Physics Letters B. - : Elsevier. - 0370-2693 .- 1873-2445. ; 492:3-4, s. 245-253
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Tidskriftsartikel (refereegranskat)abstract
- A high-spin rotational band with 11 gamma -ray transitions has barn observed in Tc-91. The dynamical moment of inertia as well as the transition quadrupole moment of 8.1(-1.4)(+1.9) eb measured for this band show the characteristics of a superdeformed band. However, the shape is more elongated than in the neighbouring A = 80-90 superdeformed nuclei. Theoretical interpretations of the band within the cranked Strutinsky approach based on two different Woods-Saxon potential parameterisations are presented. Even though an unambiguous configuration assignment proved difficult, both calculations indicate a larger deformation and at least three additional high-N intruder orbitals occupied compared to the lighter SD nuclei. (C) 2000 Elsevier Science B.V. All rights reserved.
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| 21. |
- Joss, D. T., et al.
(författare)
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Probing structural changes in the very neutron-deficient Os isotopes with recoil-decay tagging
- 2005
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Ingår i: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 31:10, s. S1593-S1598
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Tidskriftsartikel (refereegranskat)abstract
- In recent years, the exploitation of the iecoil-decay tagging (RDT) technique with,large arrays of germanium detectors has revealed much information about the structure of heavy nuclei approaching the proton drip line. The yrast bands of the N <= 93 osmium isotopes have been identified in a campaign of tagging experiments using various spectrometer arrays coupled to the RITU gas-filled separator based at the University of Jyvaskyla. Trends in the yrast state excitation energies have indicated a transition from gamma-soft triaxial to near-spherical shapes with decreasing neutron number. Recent experimental results for Os-162 obtained with the JUROGAM and GREAT spectrometers also indicate the importance of configurations involving the h(9/2) neutron states as the N = Z 82 shell gaps are approached.
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| 22. |
- Joss, D. T., et al.
(författare)
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Recoil decay tagging of gamma rays in the extremely neutron-deficient nucleus Os-162
- 2004
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Ingår i: Physical Review C. Nuclear Physics. - : American Physical Society. - 0556-2813 .- 1089-490X. ; 70:1
-
Tidskriftsartikel (refereegranskat)abstract
- The neutron-deficient nucleus Os-162, produced in the Cd-106(Ni-58,2n) reaction, has been studied using the JUROGAM gamma-ray spectrometer in conjunction with the RITU gas-filled separator and the GREAT focal plane spectrometer. gamma-ray transitions in Os-162 have been assigned for the first time through the application of the recoil decay tagging technique. The excitation energy of the 2(+) state and the tentative energy of the 8(+) state are discussed in terms of the systematic energy trends as the N=82 shell gap is approached.
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| 23. |
- Joss, D. T., et al.
(författare)
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Yrast structures in the light Pt isotopes Pt169-173
- 2005
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Ingår i: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 31:10, s. S1715-S1718
-
Tidskriftsartikel (refereegranskat)abstract
- The exploitation of the recoil-decay tagging (RDT) technique has reinvigorated experimental investigations of the shape coexistence phenomenon in heavy neutron-deficient nuclei. In a recent experiment using the JUROGAM and GREAT spectrometers in conjunction with the RITU gas-filled separator, excited states have been investigated in the light platinum isotopes. In addition to extending the yrast sequences in Pt-170 and Pt-172, the first observation of excited states in the odd-N isotopes, Pt-169 and Pt-173, is reported. The bands are discussed in terms of trends in level excitation energies as a function of neutron number.
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| 24. |
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| 25. |
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| 26. |
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| 27. |
- Lagergren, Karin, 1971-
(författare)
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Benedicamus Domino tropes in the Birgittine Order : embellishing everyday liturgy
- 2022
-
Ingår i: Early music. - : Oxford University Press. - 0306-1078 .- 1741-7260. ; 50:4, s. 465-476
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Tidskriftsartikel (refereegranskat)abstract
- A remarkable feature of the Birgittine monastic Order is its daily use of tropes for the embellishment of an exclusively monophonic liturgy. Ferial tropes were sung in both Mass and Office and their purpose was to highlight the Marian devotion that was central to the Order’s spirituality. In the Birgittine sisters’ ferial Office liturgy, the so-called Cantus sororum, the Benedicamus Domino was a notable location for the provision of tropes, which were performed daily at Lauds and Vespers. These Benedicamus tropes are a complex mix of unica, as well as musical and textual patchworks of pre-existing and new and/or remodelled musical and textual material. This article explains the place and importance of Benedicamus Domino tropes in Birgittine liturgy and spirituality, illustrated by new transcriptions of the Benedicamus tropes that were consistently assigned to embellish each particular day of the week.
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| 28. |
- Lagergren, Karin, 1971-
(författare)
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Double liturgies – : the case of the Order of the Birgittines
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- One of the peculiar features with the Birgittines is its double abbey construction with one convent for the sisters and one for the brothers. This organisation had not only practical consequences but also called for interesting liturgical solutions. Together the Birgittine sisters’ and brother’s liturgies formed a greater liturgy with a special Birgittine chantscape (a development of the soundscape concept) where texts and chant melodies collaborated in an intricate intertextual web. This paper explores how this liturgical unity was constructed and how it expressed fundamental ideas about their identity and spirituality.
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| 29. |
- Lagergren, Karin, 1971-
(författare)
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Double liturgies – the case of the Order of the Birgittines
- 2022
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The content and structure of liturgies of double monasteries is a little researched topic. By studying the Order of the Birgittines, founded by St. Birgitta of Sweden (c. 1303-1373), we gain insight into one example of how these liturgies could be organised. While the Birgittine brothers observed the diocesan liturgy, the Birgittine sisters observed a Marian-centered devotion. The diocesan liturgy observed the liturgical year while the sisters’ liturgy was more static and only observed Marian fest days. The two liturgies were said in succession, where the brother’s Office was treated as an added office and the sisters’ Office was regarded as the main Office. In particular earlier research has examined the sisters’ Divine Office the Cantus sororum but systematic studies of the Birgittine double liturgy have until now been lacking. The Cantus sororum is a mix of standard chants from the Gregorian repertoire and unique compositions. This is the only Office repertoire to have been compiled to be performed by only women. The main conclusion is that the liturgies of the both groups together formed one devotional unity here called a greater liturgy, where the liturgical year was observed with a distinct Marian focus giving the Birgittine liturgy a unique character. In order to grasp the complete Birgittine liturgy including sisters, brothers, Mass, and Office repertoires, the topic is treated as a chantscape: a landscape of chant, which is s development of the concept soundscape coined by musicologist and composer Richard Murray Schafer. Through this lens, relations in the Birgittine liturgy between its different items can more easily be studied and made visible in order to observe how systematically structured this liturgy was and how the parts corresponded into one unit.
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| 30. |
- Lagergren, Karin, et al.
(författare)
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Experimental evidence for tunneling in the decay of superdeformed states
- 2004
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Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 21:2, s. 175-177
-
Tidskriftsartikel (refereegranskat)abstract
- A systematic study of the depopulation of superdeformed rotational bands in neutron-deficient A approximate to 80-90 nuclei has been performed. We observed a correlation between the rotational frequency at which the decay out of the superdeformed bands takes place and the difference between the transition quadrupole moments of states in the superdeformed bands and high-lying states with normal deformation. The observation may constitute direct experimental evidence that the commonly adopted tunneling picture for the decay of superdeformed states is valid.
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| 31. |
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| 32. |
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| 33. |
- Lagergren, Karin, et al.
(författare)
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gamma-soft shapes and quasiparticle excitations in Ta-161(73)88
- 2011
-
Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 83:1, s. 014313-
-
Tidskriftsartikel (refereegranskat)abstract
- Excited states in the neutron-deficient odd-Z nuclide Ta-161 were identified for the first time using the Cd-106(Ni-58,3p gamma) reaction at a beam energy of 270 MeV. The pi h(11/2) band, yrast at low spin, was observed up to (47/2(-)) and a further four strongly coupled bands have been established to high spin. Quasiparticle configuration assignments for the new band structures have been made on the basis of cranked shell model calculations. This work suggests that the negative-parity nu(f(7/2), h(9/2)) orbitals are responsible for the first rotational alignment in the pi h(11/2) band.
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| 34. |
- Lagergren, Karin, et al.
(författare)
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High-spin states in the proton-unbound nucleus Re-161
- 2006
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 74:2, s. 024316-
-
Tidskriftsartikel (refereegranskat)abstract
- Excited states in Re-161 were populated using the Cd-106(Ni-58, p2n) reaction at a beam energy of 270 MeV, resulting in the first observation of gamma rays emitted from this nucleus. The reaction products were separated from scattered beam and fission fragments by the gas-filled recoil separator RITU, and were implanted in the double-sided silicon strip detectors of the GREAT spectrometer. Prompt gamma rays were detected by the JUROGAM Ge detector array and were assigned to Re-161 based on alpha- and proton-decay tagging of the implanted reaction products. The near-yrast high-spin level structure, which was delineated to spins around 39/2, is discussed in the context of the total Routhian surface formalism. The level scheme is interpreted in terms of the alignment of h(9/2)/f(7/2) neutrons at lower spins, followed by excitations involving the pi h(11/2) subshell at higher spins.
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| 35. |
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| 36. |
- Lagergren, Karin, et al.
(författare)
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Isospectral superdeformed bands in the N=46 nuclei Mo-88 and Tc-89
- 2004
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Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 21:3, s. 375-381
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Tidskriftsartikel (refereegranskat)abstract
- Superdeformed bands in Mo-88 and Tc-89 were populated Using Ca-40-induced fusion-evaporation reactions on Ni-58 at a beam energy of 185 MeV. Gamma-rays emitted in the reactions were detected using the Gammasphere spectrometer, in coincidence with charged particles detected by the Microball array. A new superdeformed band was assigned to the nucleus Mo-88, leading to a revisit of earlier configuration assignments for superdeformed structures in this nucleus. In particular, the theoretical interpretation of a pair of identical (isospectral) superdeformed bands in Mo-88/Tc-89 is discussed. The configurations that are assigned to the four SD bands belonging to Mo-88 have properties that are predicted to be significantly affected by pair correlations.
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| 37. |
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| 38. |
- Lagergren, Karin, 1971-
(författare)
-
Monastic Chant through 600 Years : A Case Study of the Order of the Birgittines
- 2022
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Ingår i: IMS 2022. ; , s. 228-229
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The abbey Maria Refugie offers a rare opportunity to examine their chant and liturgyduring a period of six hundred years. This abbey belongs to the Order of the Birgittines,founded by St. Birgitta of Sweden (ca. 1303–1373) in the fourteenth century. The Birgittines’primarily liturgical feature is the sisters’ unique divine office Cantus sororumwhich is the only liturgical repertoire compiled to be performed only by women. Abouta hundred liturgical notated books from the late fifteenth century up to the present dayare preserved in Maria Refugie’s abbey library. This allows a unique chance to studychant transmission over time in one single liturgical milieu. The sources show that the chant tradition was exceptionally persistent to change but that the community undertookrevisions of the repertoire when liturgical conditions or new musical trends calledfor it. This shows how the members in Maria Refugie negotiated with the liturgical heritage,never throwing it overboard, but were in constant dialogue with how to interpretit according to changing musical taste and liturgical conditions. In this paper a representativepart of the material will highlight both how the Birgittine Order’s identity wasmaintained musically and textually, and how revisions allowed for updating the Birgittineliturgy and its chant. Special emphasis will be given to how intertextual relationscreated a Birgittine chantscape, which is a developed concept, building on composer andmusicologist R. Murray Schafer’s soundscape concept. This newly created concept is away of looking at how music creates meaning to its practitioners beyond its text.
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| 39. |
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| 40. |
- Lagergren, Karin, 1971-
(författare)
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Musikhandskrifter
- 2022
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Ingår i: <em>Kodex</em>. - Lund : Mediehistoriskt arkiv. - 9789198580075 ; , s. 368-375
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Bokkapitel (refereegranskat)
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| 41. |
- Lagergren, Karin, et al.
(författare)
-
Shape evolution in the superdeformed A approximate to 80-90 mass region
- 2003
-
Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 68:6, s. 643091-643095
-
Tidskriftsartikel (refereegranskat)abstract
- Superdeformed bands in Mo-88, Tc-89, and Tc-91 were populated using a Ca-40 beam with an energy of 185 MeV, impinging on a backed Ni-58 target. gamma rays and charged particles emitted in the reactions were detected using the Gammasphere Ge detector array and the CsI(TI) array Microball. Average transition quadrupole moments Q(t) with significantly improved accuracy compared to earlier work, were deduced for the bands using the residual doppler shift technique. The experimental results were included into a systematic study of the Q(t) values throughout the superdeformed mass 80-90 region. The superdeformed shell gaps are predicted to move towards larger deformations with increasing Z and N in this mass region. This trend is confirmed by the experimental Q(t) values.
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| 42. |
- Lagergren, Karin, 1971-
(författare)
-
St. Botvid of Botkyrka : a local saint and his two Offices
- 2023
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- St. Botvid of Botkyrka in Sweden was a regional martyr saint who died in ca. 1120 and quickly became subject for a cult observed in all Swedish medieval dioceses. In the 13th century, an Office was compiled which until now has remained unedited. The Office is preserved as fragments in the National Archives in Stockholm, Sweden. Chants for first and second Vespers, Matins and Lauds are preserved but the little hours seem not to have been included in the Office. This presentation contextualises Botvid and his legend within other martyr saints of medieval Scandinavia and discusses the chants in the Office of which most seem to be unique pieces.
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| 43. |
- Lagergren, Karin, 1971-
(författare)
-
Studying and researching early music in Sweden
- 2023
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In Sweden, the place of early music in curricula and research program has been dependant on individuals rather than infrastructures promoting historical musicology in general and early music in particular. Like in many other countries, historical musicology at Swedish universities has declined in favour of courses in popular music, music sociology etc. No professorships only devoted to early music exist, also no research centres or musicological milieus exists that is solely occupied by studying early music though Uppsala university upholds a strong tradition in historical musicology and has ongoing doctoral and postdoctoral research projects. On a general level students in musicology meet early music to a very limited extent, sometimes only as introduction courses in (Western) music history. The possibility to introduce and attract students to the study of early music is in other words limited and leads to a serious challenge for the future of early music studies in Sweden. However, a paradigm change is perhaps in sight thanks to the material turn, the new opportunities that are offered by digital humanities, and global musicology that has been taken place over the recent years. An example is the advanced level course ‘Western Music from the 800s to the 1600s: History, Historiography, Revival’ that will be given for the first time in during 2023 at the Linneaus University. This proposal is a survey of the current situation for studying and researching early music in Sweden aiming at extending the map of early musicology in Europe and to spur discussions on the future for early musicology.
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| 44. |
- Lagergren, Karin, 1971-
(författare)
-
Sång i den heliga Birgittas klosterorden : ett chantscape
- 2022
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Föreliggande presentation utgör resultatet av tre forskningsprojekt där ett helhetsgrepp tas kring sången i den heliga Birgittas klosterorden, i synnerhet systrarnas tidegärdssång Cantus sororum. Helhetsbegreppet innebär att samtliga sånggenrer behandlats (antifoner, hymner, matutinresponsorier, korta responsorier), att fyra birgittaklosters källor undersökts och jämförts och samt ett longue-durée perspektiv från ordens uppkomst på 1300-talet fram till nutid. För att stärka helhetsperspektivet har jag valt att betrakta den birgittinska liturgin som ett chantscape, vilket är ett begrepp utvecklat från Richard Murrays Schaefers begrepp soundscape. Här används chantscape som ett verktyg för att förstå hela den klingande situationen i det birgittinska kyrkorummet. Ytterligare ett tolkningsbegrepp som används är karismabegreppet så som det uttolkats av Max Weber, i syfte att förstå hur den birgittinska liturgin kunnat förbli så oförändrad genom seklerna. Här ses Birgittas charisma som den yttersta garanten för att den birgittinska liturgin bevarat så många av de drag som kan spåras till de äldsta källorna från mitten av 1400-talet.Presentationen kommer att koncentrera sig på några särdrag som kommit att framstå som särskilt intressanta under arbetets gång:1) Det birgittinska narrativet: den gudomliga inspirationen till Cantus sororum skrivs in redan i Birgittas uppenbarelser och tillskrivs Birgittas biktfader Magister Petrus, en syn som sedan förts vidare inom orden och inom forskningen. Källorna, historiografin och dess implikationer granskas.2) Den homogena meloditransmissionen mellan kloster och över tid: spridningsmönster studeras med hjälp av melodijämförelser.3) Hur Birgittas karisma inkorporeras i ordensliturgin: sånggenren suffragieantifoner vilka explicit nämner Birgitta vid namn.4) Några exempel ges på hur melodi och texter bygger samman den birgittinska systraliturgin till en musikalisk och teologisk helhet.
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| 45. |
- Lagergren, Karin, 1971-
(författare)
-
Sången i den heliga Birgittas kloster
- 2021
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Ingår i: Tidig musik: magasinet för musik från medeltid, renässans och barock. - Stockholm : Föreningen för tidig musik. - 1400-5123. ; :4, s. 28-30
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 46. |
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| 47. |
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| 48. |
- Lagergren, Karin, 1971-
(författare)
-
The Birgittine Liturgical Music – Teamwork or the Product of a Single Genious Mind? : A New Hypothesis for an Old Question
- 2023
-
Ingår i: Birgittine Circles. - Stockholm : Kungl. Vitterhets Historie och Antikvitets Akademien. - 9789188763488 - 9789188763495 ; , s. 159-175
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- According to medieval sources, Birgitta’s confessor and collaborator magister Petrus Olavi of Skänninge († 1378) is pointed out as the originator of the sisters’ Divine Office Cantus sororum. Petrus’ authorship has been debated and contested but also accepted by scholars to various degrees. That he did not compose the complete corpus as we know it today is clear, but to what extent he is responsible for texts and musical compositions is difficult to establish, in particular in a world where borrowings and adaptations were the norm and copyright not a problem. Another problem lies in that we not have one single source with musical notation earlier than ca 1450, meaning about 70 years after magister Petrus’ death. In fact nothing is known about what the liturgy and music looked like at the official opening of Vadstena abbey in 1384. This paper aims at looking at the origin of Cantus sororum where instead the presumed collective efforts in Rome and Vadstena during the first decades of the abbey’s existence are considered. Questions the paper seeks to address are: What other people and groups could have been involved in the creation of Cantus sororum? What is the content in the earliest notated sources? When became Cantus sororum a fixed repertoire, ready for dissemination to other Birgittine abbeys? Why are there no earlier sources than from about 70 years after the foundation of the order? How and by whom did the dissemination of the repertoire take place?
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| 49. |
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| 50. |
- Lagergren, Lars, et al.
(författare)
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Projektifiering : fokus idrott och integration
- 2019
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Ingår i: Sport management. Del 2: Styrning och samhällsengagemang inom svensk idrott. - : SISU Idrottsböcker. - 9789177270522 ; , s. 245-265
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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