Calculated from ab initio Wave Functions

Speaker:

Christian Forssen

Lawrence Livermore National Laboratory

Abstract:

I will discuss present attempts to employ high-precision nuclear

structure information, from a microscopic many-body model, in nuclear

reaction calculations. The ultimate goal is to develop a fundamental

theory for light-ion fusion reactions based on realistic inter-nucleon

forces. The foundation of our approach is the ab initio no-core shell

model (NCSM), which is a well-established theoretical framework aimed

at an exact description of nuclear structure starting from

high-precision interactions between the nucleons. After a short

introduction to the nuclear many-body problem, and the NCSM in

particular, I will describe how we can extract translationally

invariant cluster form factors (overlap functions) from A-body wave

functions in the harmonic-oscillator basis space, and subsequently use

them in cross section calculations. Examples will be given for a few

capture reactions that are of interest for nuclear astrophysics.