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Träfflista för sökning "WFRF:(Svensson J H) srt2:(1995-1999)"

Search: WFRF:(Svensson J H) > (1995-1999)

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  • Svensson, C. E., et al. (author)
  • Decay Out of the Doubly Magic Superdeformed Band in the N=Z Nucleus 60Zn
  • 1999
  • In: Physical Review Letters. - 1079-7114. ; 82:17, s. 3400-3403
  • Journal article (peer-reviewed)abstract
    • The doubly magic superdeformed band in the N = Z nucleus Zn-60 has been identified. Linking transitions connecting this band to the yrast line provide the first spin, parity, and excitation energy measurements for superdeformed states in the A similar to 60 region. The stretched-E2 character and relatively large B(E2) values of these transitions suggest a nonstatistical decay-out process.
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  • Yu, C. H., et al. (author)
  • Comparison of Superdeformed Bands in 61Zn and 60Zn: Possible Evidence for T=0 Pairing
  • 1999
  • In: Physical Review C (Nuclear Physics). - 0556-2813. ; 60:3
  • Journal article (peer-reviewed)abstract
    • The yrast superdeformed band in Zn-61 has been established using Si-28(Ar-36, 2pn)Zn-61 and Ca-40(Si-29, 2 alpha)Zn-61 fusion-evaporation reactions. The excitation energy of this band was determined via two transitions that link this band to the normally deformed states. Lifetime analysis of this band resulted in a quadrupole moment of Q(t) = 3.0 +/- (0.5)(0.4)e b, which corresponds to a deformation of beta(2) = 0.50+/-(0.07)(0.06). A comparison of the J((2)) dynamical moments of inertia of the yrast superdeformed band in Zn-61 with those in Zn-60 shows a nearly complete blocking of the observed alignment in Zn-60, indicating that T=0 proton-neutron pair correlations may be present in Zn-60. [S0556-2813(99)51109-6].
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  • Svensson, C. E., et al. (author)
  • Observation and Quadrupole Moment Measurement of the First Superdeformed Band in the A~60 Mass Region
  • 1997
  • In: Physical Review Letters. - 1079-7114. ; 79:7, s. 1233-1236
  • Journal article (peer-reviewed)abstract
    • A high-spin rotational cascade of six gamma rays has been observed in Zn-62. The quadrupole moment of 2.7(-0.5)(+0.7) e b measured for this band corresponds to a deformation beta(2) = 0.45(-0.07)(+0.10). The properties of this band are in excellent agreement with calculations that predict high-spin superdeformed bands in Zn-62 with deformations beta(2) = 0.41-0.49. These results establish a new region of superdeformation for nuclei with neutron and proton numbers N, Z approximate to 30-32.
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  • Svensson, C. E., et al. (author)
  • Smooth Termination of Rotational Bands in 62Zn: Evidence for a Loss of Collectivity
  • 1998
  • In: Physical Review Letters. - 1079-7114. ; 80:12, s. 2558-2561
  • Journal article (peer-reviewed)abstract
    • Two sets of strongly coupled rotational bands have been identified in Zn-62. These bands have been observed up to the terminating states of their respective configurations. Lifetime measurements indicate that the transition quadrupole moments in these bands decrease as termination is approached. These results establish the first terminating states of rotational bands in the A similar to 60 mass region and confirm the predicted loss of collectivity associated with smooth band termination.
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  • Andersson, T., et al. (author)
  • High-spin States in the A=39 Mirror Nuclei 39Ca and 39K
  • 1999
  • In: European Physical Journal A. Hadrons and Nuclei. - 1434-6001. ; 6, s. 5-8
  • Journal article (peer-reviewed)abstract
    • High-spin states of the mass A = 39 mirror pair K-39 and Ca-39 were investigated via the fusion-evaporation reaction Si-28+O-16 at 125 MeV beam energy. The GAMMASPHERE array in conjunction with the 4 pi charged-particle detector array MICROBALL and neutron detectors was used to detect gamma rays in coincidence with evaporated light particles. The results of the first high-spin study of the T-z = -1/2 nucleus Ca-39 are discussed in terms of mirror symmetry and compared to spherical shell-model calculations in the 1d(3/2)-1f(7/2) configuration space.
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  • Kuznetsov, A.Yu., et al. (author)
  • Diffusion of phosphorus in strained Si/SiGe/Si heterostructures
  • 1999
  • In: Materials Research Society Symposium - Proceedings. - San Francisco, CA, USA. ; 568:Warrendale, PA, United States, s. 271-276
  • Journal article (peer-reviewed)abstract
    • Phosphorus diffusion in a biaxially compressed Si0.87Ge0.13 film has been investigated in the temperature range of 810-900 °C. A significant enhancement of the P diffusion in the biaxially compressed Si0.87Ge0.13 in comparison with P diffusion in Si is observed. Injection of Si self-interstitials (I) during oxidation of a Si-cap in Si/Si0.87Ge0.13/Si heterostructures is used to characterize the atomic mechanism of P diffusion in Si0.87Ge0.13. It is found that the upper limit of the interstitial fraction of the P diffusion in Si0.87Ge0.13 is 0.87 of that in Si. A comparison between B and P diffusivities in SiGe supports the hypothesis of the pairing-controlled mechanism for the diffusion of B in SiGe.
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  • Belletti, S., et al. (author)
  • Quality assurance in radiotherapy: the importance of medical physics staffing levels. Recommendations from an ESTRO/EFOMP joint task group
  • 1996
  • In: Radiotherapy and Oncology. - 1879-0887. ; 41:9, s. 89-94
  • Journal article (peer-reviewed)abstract
    • The safe application of ionising radiation for diagnosis and therapy requires a high level of knowledge of the underlying processes and of quality assurance. Sophisticated modern equipment can be used effectively for complicated diagnostic and therapeutic techniques only with adequate physics support. In the light of recent analyses and recommendations by national and international societies a joint working group of representatives from ESTRO (European Society for Therapeutic Radiology and Oncology) and from EFOMP (European Federation of Organisations for Medical Physics) was set up to assess the necessary staffing levels for physics support to radiotherapy. The method used to assess the staffing levels, the resulting recommendations and examples of their practical application are described.
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  • Doyle, J P, et al. (author)
  • Observation of near-surface electrically active defects in n-type 6H-SiC
  • 1998
  • In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 83, s. 3649-3651
  • Journal article (peer-reviewed)abstract
    • In n-type 6H-SiC epitaxial layers grown by vapor phase epitaxy, we find that in contrast to the majority of the epitaxial layer, where electrically active defects are observed with a concentration less than 1 X 10(-13) cm(-3), a region near the front surface contains defects with concentrations approaching 10(14) cm(-3). A relationship between the near-surface defects and metallic impurities is suggested by a Ti concentration of 1 X 10(16) cm(-3) in this region. The high concentration of near surface defects is found to significantly reduce the carrier lifetime. (C) 1998 American Institute of Physics. [S0021-8979(98)03007-2].
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  • Herlitz, Johan, et al. (author)
  • Similar risk reduction of death of extended-release metoprolol once daily and immediate release metoprolol twice daily during 5 years after myocardial infarction
  • 1999
  • In: Cardiovascular Drugs and Therapy. - : Springer New York LLC. - 0920-3206 .- 1573-7241. ; 13:2, s. 127-135
  • Journal article (peer-reviewed)abstract
    • The pooled results from five placebo-controlled postinfarction studies with metoprolol have shown a significant reduction in total mortality. All five studies used immediate-release metoprolol twice daily. An extended-release formulation of metoprolol for once-daily use has since been developed. The aim of the present study was to compare the two different forms of metoprolol with regard to the risk reduction of death for 5 years postinfarction and to analyze whether treatment with the beta-blocker metoprolol is associated with a reduced mortality after the introduction of modern therapies such as thrombolysis, aspirin, and ACE inhibitors. All patients discharged after an acute myocardial infarction (AMI) from Sahlgrenska University Hospital (SU) during 1986-1987 (n = 740, Period I) and during 1990-1991 (n = 1446, Period II) from both SU and Ostra Hospital, Göteborg, Sweden, were included in the study. During Period I, 56% were prescribed immediate-release metoprolol compared with 61% prescribed extended-release metoprolol during Period II. Immediate-release metoprolol was not available for outpatient use during Period II. In a multivariate analysis, all variables significantly associated with either increased or decreased postinfarction mortality during Periods I and II (univariate analysis of patient characteristics, medical history, complications during the AMI medication at discharge) studied were with Cox's proportional hazards model. Treatment with immediate-release metoprolol was significantly associated with reduced mortality over 5 years during Period I (relative risk reduction for total mortality, -34%, P = 0.003; 95% CI for RR, 0.51-0.87), and treatment with extended-release metoprolol was significantly associated with reduced mortality during Period II (-34%, P < 0.0001; 95% CI for RR, 0.53-0.82). Thrombolysis and the use of aspirin and ACE inhibitors were more frequently used during Period II. The results showed that postinfarction treatment with extended-release metoprolol given once daily was associated with a similar risk reduction of death over 5 years as immediate-release metoprolol given twice daily. The data, furthermore, indicate that the beta-blocker metoprolol is associated with a reduced risk of death after the introduction of modern therapy such as thrombolysis, aspirin, and ACE inhibitors.
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  • Svensson, S, et al. (author)
  • New end station for the study of gases, liquids, and solid films at the MAX laboratory
  • 1996
  • In: REVIEW OF SCIENTIFIC INSTRUMENTS. - : AMER INST PHYSICS. ; 67:6, s. 2149-2156
  • Journal article (other academic/artistic)abstract
    • A new end station equipped with a very high-resolution SES-200 electron energy analyzer has been constructed for the study of gases and soft molecular materials. The analyzer is rotatable around the direction of the photon beam, allowing angular-dependent
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  • Vasi, J, et al. (author)
  • Five homologous repeats of the protein G-related protein MIG cooperate in binding to goat immunoglobulin G
  • 1999
  • In: Infection and Immunity. - 1098-5522. ; 67:1, s. 413-416
  • Journal article (peer-reviewed)abstract
    • Protein MIG, from Streptococcus dysgalactiae, binds alpha2-macroglobulin and immunoglobulin G (IgG). MIG-derived fusion proteins with one to five IgG-binding repeats differed up to 72,000- fold in avidity for goat IgG, indicating a considerable cooperativity of the repeats. Significant sequence variation in the IgG-binding repeats was recognized. Protein MIG interacted with goat IgG1 via both the Fc and Fab parts.
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  • Aksela, H, et al. (author)
  • The character of the Xe 4p -> nl resonances studied with the aid of their Auger decay
  • 1998
  • In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 31:24, s. 5337-5346
  • Journal article (other academic/artistic)abstract
    • Theoretical predictions for the Xe 4p --> nl photoexcitation are shown to depend strongly on the gauge and wavefunctions used in calculations. In order to test the theory, the resonant Auger decay of the Xe 4p(-1)nl states has been measured with high phot
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  • Bertilsson, G, et al. (author)
  • Identification of a human nuclear receptor defines a new signaling pathway for CYP3A induction
  • 1998
  • In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - : Proceedings of the National Academy of Sciences. - 0027-8424. ; 95:21, s. 12208-12213
  • Journal article (other academic/artistic)abstract
    • Nuclear receptors regulate metabolic pathways in response to changes in the environment by appropriate alterations in gene expression of key metabolic enzymes, Here, a computational search approach based on iteratively built hidden Markov models of nuclea
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  • Monstein, H.-J., et al. (author)
  • Cloning and characterization of 5'-end alternatively spliced human cholecystokinin-B receptor mRNAs
  • 1998
  • In: Receptors and Channels. - 1060-6823 .- 1607-856X. ; 6:3, s. 165-177
  • Journal article (peer-reviewed)abstract
    • We report here the cloning and characterization of a 5'-end alternatively spliced human cholecystokinin-B (CCK-B) receptor mRNA. The 5'-end of this CCK-B receptor transcript (termed CCK-BRtx) consisted of exon Ia, present in the ordinary full-length CCK-B receptor mRNA (CCK-BRwt), and exon Ib, present in a previously described 5'-end alternatively spliced CCK-B receptor mRNA (CCK-BRt). A short open reading frame preceded the AUG translation initiation codon of the CCK-BRtx. Transfection of COS-7 cells with the CCK-BRtx or CCK-BRt cDNAs did not lead to the appearance of peptidergic and non-peptidergic binding sites. Cell free in vitro translation yielded proteins of approximately 44 kDa (CCK-B receptor) and 40 kDa (CCK-BRt receptor) whereas no 40 kDa product was detected from the cloned CCK-BRtx cDNA. Instead, a protein product of approximately 9 kDa was visualized, the size corresponding to the predicted protein encoded by the short open reading frame. The alternatively spliced CCK-B receptor transcripts were concomitantly expressed with the ordinary full-length CCK-B receptor mRNA in the brain, pancreas, and stomach. The possibility that such transcripts are translated in vivo into truncated CCK-B receptors is discussed.
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  • SAIRANEN, OP, et al. (author)
  • THE RESONANCE AUGER DECAY OF THE XE 4D(3/2,5/2)(-1)NP, N=7,8 STATES STUDIED BY HIGH-RESOLUTION EXPERIMENT
  • 1995
  • In: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. - : IOP PUBLISHING LTD. - 0953-4075. ; 28:20, s. 4509-4528
  • Journal article (other academic/artistic)abstract
    • The de-excitation of the resonantly excited Xe 4d(3/2,5/27p)(-1) and 4d(3/2,5/2)(-1)8p states is studied with very high photon and electron energy resolution using the new Finnish beamline at MAX-laboratory, Lund, Sweden. The fine structure of the spectra
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  • Result 1-50 of 52

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