Shell-Model Lanczos-Method Studies of the Gamow-Teller Strength Function in Astrophysics

摘要

We utilize the Livermore system of vectorized shell-model codes to study the Gamow-Teller stength functions for a variety of nuclei whose weak-interaction properties are of interest in astrophysics. The Lanczos method is used to diagonalize a model space consisting of low-seniority excitations (including all states directly populated by the Gamow-Teller operator) with a realistic finite-range effective interaction. The effects of model-space truncation are systematically investigated for each nucleus. The results of these calculations are discussed in connection with problems in stellar evolution, supernova collapse, and nucleosynthesis. 20 references, 8 figures. (ERA citation 10:009134)