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Shell Model Monte Carlo Studies of γ-Soft Nuclei

1996; American Physical Society; Volume: 77; Issue: 8 Linguagem: Inglês

10.1103/physrevlett.77.1444

1092-0145

Y. Alhassid, G. F. Bertsch, D. J. Dean, S. E. Koonin,

Quantum Chromodynamics and Particle Interactions

We present shell model Monte Carlo calculations for nuclei in the full major shell 50--82 for both protons and neutrons. For the interaction we use a pairing plus quadrupole derived from a surface-peaked separable force. The methods are illustrated for ${}^{124}$Sn, ${}^{128}$Te, and ${}^{124}$Xe. We calculate shape distributions, moments of inertia, and pairing correlations as functions of temperature and angular velocity. Our calculations are the first microscopic evidence of \ensuremath{\gamma}-softness of nuclei in this region.