Alternate Solution of the $\alpha$-Potential Mystery

TL;DR

This paper proposes an alternative approach to resolving the $$-potential mystery by validating statistical-model parameters with independent data, enhancing the understanding of nucleon-induced alpha emission in medium-mass nuclei.

Contribution

It introduces a new method for assessing the alpha-particle optical model potential using validated statistical parameters and considers additional reaction channels affecting alpha emission.

Findings

Validated alpha-particle optical potential for A~60 nuclei.

Increased alpha emission explained by pickup direct interaction and GQR features.

Enhanced agreement with experimental data for low-lying states feeding.

Abstract

A consistent set of statistical-model input parameters, validated by analysis of various independent data, makes possible the assessment of an $\alpha$-particle optical model potential [Phys. Rev. C {\bf 90}, 044612 (2014)] also for nucleon-induced $\alpha$-emission within $A$$\sim$60 mass-number range. The advantage of recent data for low-lying states feeding is taken as well. Consideration of additional reaction channels leading to increase of the $\alpha$-emission beyond the statistical predictions has concerned the pickup direct interaction and Giant Quadrupole Resonance similar features.