Complete 0 hbar omega calculations of Gamow-Teller strengths for nuclei in the iron region

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.

arXiv comment13 pages + 1 postscript file, Caltech preprint MAP-169

References in corpus (2)

• Monte Carlo evaluation of path integrals for the nuclear shell model
• Practical solution to the Monte Carlo sign problem: Realistic calculations of 54Fe

Cited by in corpus (12)

• Pairing in nuclear systems: from neutron stars to finite nuclei
• Shell-model Monte Carlo studies of fp-shell nuclei
• Electron capture on iron group nuclei
• Thermal properties of Fe-54
• Pairing correlations in N~Z pf-shell nuclei
• Supernova electron capture rates for 55Co and 56Ni
• Gamow-Teller strength distributions in fp-shell nuclei
• Gamow-Teller strength in 54Fe and 56Fe
• Temperature Dependence of Pair Correlations in Nuclei in the Iron-Region
• On the temperature dependence of the symmetry energy
• Quantum Monte Carlo Methods for Nuclei at Finite Temperature
• Gross Theory Model for Neutrino-Nucleus Cross Section