Shell-model Monte Carlo studies of fp-shell nuclei

Details Shell-model Monte Carlo studies of fp-shell nuclei Shell-model Monte Carlo studies of fp-shell nuclei

1995-04-19

arxiv.org/abs/nucl-th/9504019v1

Physics

Nuclear Physics

Nuclear Theory

20 pages, 7 figures, Caltech Preprint-

Scientific paper

10.1103/PhysRevC.52.718

We study the gross properties of even-even and $N=Z$ nuclei with $A=48-64$ using shell-model Monte Carlo methods. Our calculations account for all $0 \hbar \omega$ configurations in the $fp$-shell and employ the modified Kuo-Brown interaction KB3. We find good agreement with data for masses and total $B(E2)$ strengths, the latter employing effective charges $e_p=1.35e$ and $e_n=0.35e$. The calculated total Gamow-Teller strengths agree consistently with the $B(GT_+)$-values deduced from $(n,p)$ data if the shell model results are renormalized by $0.64$, as has already been established for $sd$-shell nuclei. The present calculations therefore suggest that this renormalization (i.e., $g_A=1$ in the nuclear medium) is universal.

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