Three-body decays: structure, decay mechanism and fragment properties

TL;DR

This paper investigates three-body decay mechanisms of many-body resonances, comparing R-matrix and Faddeev methods, and examines the effects of angular momentum and boson symmetries, with an application to 12C decay.

Contribution

It provides a comparative analysis of decay descriptions and explores symmetry effects, offering insights into decay dynamics of nuclear resonances.

Findings

R-matrix and Faddeev methods show consistent results for decay mechanisms.

Angular momentum and boson symmetries significantly influence decay properties.

Computed alpha-particle energy distribution matches experimental expectations.

Abstract

We discuss the three-body decay mechanisms of many-body resonances. R-matrix sequential description is compared with full Faddeev computation. The role of the angular momentum and boson symmetries is also studied. As an illustration we show the computed $\alpha$-particle energy distribution after the decay of 12C(1^+) resonance at 12.7 MeV.