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Search: WFRF:(Jones M) > Conference paper

  • Result 1-10 of 126
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1.
  • Aamodt, K., et al. (author)
  • Alignment of the ALICE Inner Tracking System with cosmic-ray tracks
  • 2010
  • In: Journal of Instrumentation. - 1748-0221. ; 5
  • Conference paper (peer-reviewed)abstract
    • ALICE (A Large Ion Collider Experiment) is the LHC (Large Hadron Collider) experiment devoted to investigating the strongly interacting matter created in nucleus-nucleus collisions at the LHC energies. The ALICE ITS, Inner Tracking System, consists of six cylindrical layers of silicon detectors with three different technologies; in the outward direction: two layers of pixel detectors, two layers each of drift, and strip detectors. The number of parameters to be determined in the spatial alignment of the 2198 sensor modules of the ITS is about 13,000. The target alignment precision is well below 10 mu m in some cases (pixels). The sources of alignment information include survey measurements, and the reconstructed tracks from cosmic rays and from proton-proton collisions. The main track-based alignment method uses the Millepede global approach. An iterative local method was developed and used as well. We present the results obtained for the ITS alignment using about 10(5) charged tracks from cosmic rays that have been collected during summer 2008, with the ALICE solenoidal magnet switched off.
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2.
  • Procter, M. G., et al. (author)
  • Lifetime measurement in the proton-unbound nucleus 109I
  • 2011
  • In: AIP Conf. Proc.. - : AIP. - 9780735409835 ; , s. 105-110
  • Conference paper (peer-reviewed)abstract
    • The Recoil-Distance Doppler-shift method has been combined with Recoil-Decay Tagging for the first time to measure a lifetime in the proton-unbound nucleus 109I. The lifetime value was determined using the Differential Decay-Curve method in singles mode. The result has been compared to theoretical shell-model calculations in order to better understand the nature of unbound valence nucleons at the proton drip line.
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3.
  • Joss, D. T., et al. (author)
  • The influence of quasineutron configurations on 161Ta and nearby odd-A nuclei
  • 2011
  • In: AIP Conf. Proc.. - : AIP. - 9780735409835 ; , s. 43-48
  • Conference paper (peer-reviewed)abstract
    • Several strongly coupled bands in the neutron-deficient nucleus 161Ta have been identified and quasiparticle configuration assignments have been made on the basis of rotational alignments and cranked shell model calculations. The level scheme elucidated for 161Ta highlights the competition between the ν(h 9/2) and ν(i 13/2) orbitals to form the yrast spectrum. The band structures in 161Ta also provide new insights into the structural features of other heavy odd-A nuclei populated with much lower reaction cross sections in this region at the proton drip line.
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4.
  • Klimkiewicz, A., et al. (author)
  • Pygmy Dipole Strength in Exotic Nuclei and the Equation of State
  • 2009
  • In: AIP Conference Proceedings. - 1551-7616 .- 0094-243X. ; 1165, s. 181-184 461
  • Conference paper (peer-reviewed)abstract
    • A concentration of dipole strength at energies below the giant dipole resonance was observed in neutron-rich nuclei around Sn-132 in an experiment using the FRS-LAND setup. This so-called "pygmy" dipole strength can be related to the parameters of the symmetry energy and to the neutron skin thickness on the grounds of a relativistic quasiparticle random-phase approximation. Using this ansatz and the experimental findings for Sn-130 and 132 Sri, we derive a value of the symmetry energy pressure of (p) over bar (0) = 2.2 +/- 0.5 MeV/fm(3). Neutron skin thicknesses of R-n-R-p = 0.23 +/- 0.03 fm and 0.24 +/- 0.03 fm for Sn-130 and Sn-132, respectively, have been determined. Preliminary results on Ni-68 from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for Ni-58 are in accordance with results from photoabsorption measurements.
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5.
  • Petts, A., et al. (author)
  • Lifetime measurements and coulomb excitation of light Hg nuclei
  • 2009
  • In: Capture Gamma-Ray Spectroscopy and Related Topics. - : American Institute of Physics (AIP). - 9780735406230 ; , s. 414-418
  • Conference paper (peer-reviewed)abstract
    • Two complementary experimental programs have taken place to investigate the origin and evolution of shape coexistence in the light mercury region. Recoil Distance Doppler-shift measurements were performed at the University of Jyväskylä utilizing the Köln plunger device in conjunction with the JUROGAM + RITU + GREAT setup. In addition, Coulomb excitation measurements of 184,186,188Hg were performed at REX-ISOLDE using the MINIBALL Ge-detector array. The results of the lifetime measurements of the yrast states up to Iπ = 10+ in 182Hg are reported. Preliminary analysis of the Coulomb excitation data is also discussed.
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6.
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7.
  • Podolyak, Zs., et al. (author)
  • Structure of Neutron-rich Nuclei Around the N=126 Closed Shell; the Yrast Structure of 205Au up to Spin-parity I = (19/2+)
  • 2009
  • In: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 42:3, s. 489-493
  • Conference paper (peer-reviewed)abstract
    • Heavy neutron-rich nuclei have been populated through the relativistic fragmentation of a Pb-208(82) beam at E/A = 1 GeV on a 2.5 g/cm(2) thick Be target. The synthesised nuclei were selected and identified in-flight using the fragment separator at GSI. Approximately 300 ns after production, the selected nuclei were implanted in an similar to 8 mm thick perspex stopper, positioned at the centre of the RISING gamma-ray detector spectrometer array. A previously unreported isomer with a half-life T-1/2 = 163(5) ns has been observed in the N = 126 closed-shell nucleus Au-205(79). Through gamma-ray singles and gamma-gamma coincidence analysis a level scheme was established. The comparison with a shell model calculation tentatively identifies the spin-parity of the excited states, including the isomer itself, which is found to be I-pi = (19/2(+)).
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8.
  • Regan, P. H., et al. (author)
  • First Results from the Stopped RISING Campaign at GSI: The Mapping of Isomeric Decays in Highly Exotic Nuclei
  • 2007
  • In: AIP Conference Proceedings. - : AIP. - 0094-243X. - 9780735413283 ; 899, s. 19-22
  • Conference paper (peer-reviewed)abstract
    • The first results from the Stopped Beam RISING experimental campaign performed at the GSI laboratory in Darmstadt, Germany, are presented. RISING (Rare ISotope INvestigations at GSI) constitutes a major new experimental program in European nuclear structure physics research aimed at using relativistic‐energy, projectile‐fragmentation reactions to study nuclei with exotic proton‐to‐neutron ratios. This paper introduces the physics aims of the Stopped RISING collaboration and presents some technical details and initial results from experiments using the RISING array to study decays from metastable nuclear states in both proton and neutron‐rich nuclei.
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9.
  • Steer, S. J., et al. (author)
  • Isomeric Decay Studies In Neutron-Rich N Approximate To 126 Nuclei
  • 2009
  • In: International Journal Of Modern Physics E-Nuclear Physics. - 0218-3013. ; 18:4, s. 1002-1007
  • Conference paper (peer-reviewed)abstract
    • Heavy neutron-rich nuclei were populated via relativistic energy fragmentation of a E/A= 1 GeV Pb-208 beam. The nuclei of interest were selected and identified by a fragment separator and then implanted in a passive plastic stopper. Delayed. rays following internal isomeric decays were detected by the RISING array. Experimental information was obtained on a number of nuclei with Z=73-80 (Ta-Hg), providing new information both on the prolate-oblate transitional region as well as on the N=126 closed shell nuclei.
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10.
  • BERTOLOTTO, L, et al. (author)
  • RESULTS FROM (P)OVER-BAR-P-]PHI-PHI
  • 1994
  • In: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS. - : EDITRICE COMPOSITORI BOLOGNA. ; , s. 2329-2337
  • Conference paper (peer-reviewed)abstract
    • The reaction ($) over bar pp --> phi phi is investigated in the JETSET (PS202) experiment using an internal target in LEAR. Data have been analysed at a variety of beam momenta from 1.2 GeV/c to 2.0 GeV/c, corresponding to centre-of-mass energies between
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  • Result 1-10 of 126
Type of publication
Type of content
other academic/artistic (67)
peer-reviewed (59)
Author/Editor
Jones, R. (9)
Julin, R. (9)
Rahkila, P. (9)
Scholey, C. (9)
Uusitalo, J. (9)
Leino, M. (9)
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Greenlees, P. T. (9)
Grahn, T. (8)
Juutinen, S. (8)
Nyman, M (8)
Jones, C (7)
Pakarinen, J. (7)
Sarén, J. (7)
Jones, G. (6)
Jones, M. (6)
van Tinteren, H (6)
Page, R. D. (6)
Darby, I. G. (6)
Sandstedt, B (6)
Jones, J. (5)
Jones, S. (5)
Öberg, Sven (5)
Ahlberg, M (5)
Pavelka, K (5)
Hadinia, Baharak (5)
Bergeron, C (5)
Jolie, J. (5)
Ostergaard, M. (5)
Liu, Z. (4)
Osterborg, A (4)
Jones, A. (4)
O'Brien, S. (4)
Kurz, N (4)
Eyrich, W. (4)
Kilian, K (4)
Stilgenbauer, S. (4)
Hollman Frisman, Gun ... (4)
Cederwall, Bo (4)
Gerl, J. (4)
Geissel, H. (4)
Geirsson, AJ (4)
Gudbjornsson, B (4)
Becker, F. (4)
Hillmen, P. (4)
Jones, D.J. (4)
Hetland, ML (4)
Sorri, J. (4)
Geyer, R. (4)
Hallek, M. (4)
Franz, J (4)
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University
Karolinska Institutet (57)
Royal Institute of Technology (15)
Lund University (11)
Chalmers University of Technology (10)
Luleå University of Technology (8)
Uppsala University (7)
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Linköping University (6)
Jönköping University (5)
University of Gothenburg (4)
Umeå University (1)
Halmstad University (1)
Stockholm University (1)
Mid Sweden University (1)
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Language
English (126)
Research subject (UKÄ/SCB)
Natural sciences (42)
Engineering and Technology (12)
Medical and Health Sciences (11)
Social Sciences (3)

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