Microscopic Study of $\alpha+N$ Bremsstrahlung from Effective and Realistic Multi-nucleon Interactions

TL;DR

This paper investigates alpha-nucleon bremsstrahlung using both an effective cluster model with meson-exchange effects and a realistic interaction approach with the No-Core Shell Model, comparing their contributions to electromagnetic transitions.

Contribution

It introduces a microscopic study combining effective and realistic nucleon interactions to analyze bremsstrahlung in alpha-nucleon systems, including meson-exchange effects and advanced nuclear models.

Findings

E1 and E2 transition contributions evaluated

Comparison of mirror systems $oldsymbol{ ext{alpha+p}}$ and $oldsymbol{ ext{alpha+n}}$

Preliminary results for $oldsymbol{ ext{alpha+p}}$ bremsstrahlung obtained

Abstract

Based on an effective nucleon-nucleon interaction, a microscopic cluster model of the nucleus-nucleus bremsstrahlung, including implicitly a part of the effects of meson-exchange currents via an extension of the Siegert theorem is applied to the $\alpha+p$ and $\alpha+n$ systems. The contributions of the $E1$ and $E2$ transitions to the bremsstrahlung cross sections are evaluated and their relative importance for the mirror systems $\alpha+p$ and $\alpha+n$ is compared. Another approach based on realistic two- and three-nucleon interactions and the No-Core Shell Model/Resonating-Group Method is also investigated. Some preliminary results for the $\alpha+p$ bremsstrahlung are displayed.