Shell model description of Gamow-Teller strengths in pf-shell nuclei
نویسندگان
چکیده
منابع مشابه
Gamow shell model description of neutron-rich nuclei.
This work presents the first continuum shell-model study of weakly bound neutron-rich nuclei involving multiconfiguration mixing. For the single-particle basis, the complex-energy Berggren ensemble representing the bound single-particle states, narrow resonances, and the nonresonant continuum background is taken. Our shell-model Hamiltonian consists of a one-body finite potential and a zero-ran...
متن کاملGamow-Teller strength distributions in fp-shell nuclei
P. B. Radha,* D. J. Dean, S. E. Koonin, K. Langanke, and P. Vogel W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37381 Institut for Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark Division of Physics, Mathematics and Astronomy, Californi...
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Background: Electron-capture reaction rates on medium-heavy nuclei are an important ingredient for modeling the late evolution of stars that become core-collapse or thermonuclear supernovae. The estimation of these rates requires the knowledge of Gamow-Teller strength distributions in the β+ direction. Astrophysical models rely on electron-capture rate tables largely based on theoretical models...
متن کاملCentroids of Gamow-Teller transitions at finite temperature in fp-shell neutron-rich nuclei
The temperature dependence of the energy centroids and strength distributions for Gamow-Teller (GT) 1+ excitations in several fp-shell nuclei is studied. The quasiparticle random phase approximations (QRPA) is extended to describe GT states at finite temperature. A shift to lower energies of the GT+ strength is found, as compared to values obtained at zero temperature. Typeset using REVTEX ∗Ema...
متن کاملMicroscopic description of nuclei in the middle of the pf-shell by a shell model calculation with G-matrix interaction
Energy levels and electromagnetic properties of 24 nuclides with N = 28 ∼ 30 are studied in terms of a large-scale shell model calculation, which contains no newly adjusted parameters. The Kuo-Brown G-matrix interaction is shown to reproduce energy levels of 205 low-lying states of all these nuclei. We evaluate effective charges by incorporating the core-polarization effects caused by the coupl...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2016
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2016-16181-3