GAMOW-TELLER STRENGTH DISTRIBUTIONS IN FP-SHELL NUCLEI

We use the shell model Monte Carlo method to calculate complete 0f1p-s hell response functions for Gamow-Teller (GT) operators and obtain the corresponding strength distributions using a maximum entropy techniqu e. The approach is validated against direct diagonalization for Ti-48. Calculated GT strength distributions agree well with data from (n,p) and (p,n) reactions for nuclei with A=48-64. We also calculate the tem perature evolution of the GT, distributions for representative nuclei and find that the GT, distributions broaden and the centroids shift to lower energies with increasing temperature.