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Shell model studies of nuclei with A=92-98

1999
10 pages
Published in:
  • Phys.Rev.C 60 (1999) 054316
DOI:
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Abstract: (APS)
Shell model calculations are carried out for the spectra of nuclei with 92<~A<~98 in the model space in which the valence protons occupy the 1f5/2, 2p3/2, 2p1/2, and 1g9/2 orbitals, and valence neutrons occupy 1g9/2, 2p1/2, 2d5/2, 2d3/2, 3s1/2, and 1g7/2 orbitals using a partition truncation method. We first select partitions that are big enough to describe the spectra of nuclei with N=50. Then we combine all possible valence neutron partitions with the selected valence proton partitions of the corresponding nuclei with N=50 to diagonalize the Hamiltonians for the nuclei with 54>~N>~51. The weak-coupling scheme is used to analyze the experimental data and the calculated results. The concepts of independent nucleon-pair motion in even-even nuclei and the homologous state structure in even-odd nuclei are held in this mass region. The spectra of 4295Mo53 and 4395Tc52 share a special similar structure; i.e., the low-lying states of 4295Mo53 up to 2.5 MeV can be obtained by replacing the last odd proton in 4395Tc52 and vice versa.
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