Be-7(p,gamma)B-8 S-factor from ab initio wave functions

摘要

There has been a significant progress in ab initio approaches to the structure of light nuclei. Starting from realistic two- and three-nucleon interactions the ab initio no-core shell model (NCSM) predicts low-lying levels in p-shell nuclei. It is a challenging task to extend ab initio methods to describe nuclear reactions. We present here a brief overview of the the first steps taken toward nuclear reaction applications. In particular, we discuss our calculation of the Be-7(p,gamma)(8) S-factor. We also present our first results of the He-3(alpha,gamma)(7) Be S-factor and of the S-factor of the mirror reaction H-3(alpha,gamma)(7) Li. The Be-7(p,gamma)B-8 and He-3(alpha, gamma)(7) Be reactions correspond to the most important uncertainties in solar model predictions of neutrino fluxes.