arXiv:nucl-th/9402006·v1·Nuclear Theory
Complete 0 hbar omega calculations of Gamow-Teller strengths for nuclei in the iron region
D. J. Dean🇺🇸 · P. B. Radha🇺🇸 · K. Langanke🇺🇸 · Y. Alhassid🇺🇸 · S. E. Koonin🇺🇸 · W. E. Ormand🇺🇸
Abstract
Gamow-Teller strengths for selected nuclei in the iron region (A~56) have been investigated via shell-model Monte Carlo calculations with realistic interactions in the complete fp basis. Results for all cases show significant quenching relative to single-particle estimates, in quantitative agreement with (n,p) data. The J=1,T=0 residual interaction and the f_{7/2}-f_{5/2} spin-orbit splitting are shown to play major roles in the quenching mechanism. Calculated B(E2, 2^+_1 -> 0^+_1) values are in fair agreement with experiment using effective charges of e_p=1.1e and e_n=0.1e.
Comments: 13 pages + 1 postscript file, Caltech preprint MAP-169