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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

nucl-tharXiv:nucl-th/9402006

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 f7/2-f5/2 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 ep=1.1e and en=0.1e.

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