Nuclear Many-Body Effect on Particle Emissions Following Muon Capture on $^{28}$Si and $^{40}$Ca

TL;DR

This paper investigates particle emissions after muon capture on silicon and calcium nuclei, emphasizing the importance of nuclear many-body correlations, especially two-particle two-hole excitations, in accurately modeling these processes.

Contribution

It introduces a new microscopic model combining muon capture and particle emission models, highlighting the role of nuclear many-body effects in emission spectra and rates.

Findings

Nuclear many-body correlations are crucial for accurate particle emission predictions.

Two-particle two-hole excitations significantly influence muon capture outcomes.

The model successfully explains capture rates, spectra, and multiplicities simultaneously.

Abstract

Muon captures on nuclei have provided us with plenty of knowledge of nuclear properties. Recently, this reaction attracts attention in electronics, because it is argued that charged particle emissions following muon capture on silicon trigger non-negligible soft errors in memory devices. To investigate the particle emissions from a nuclear physics point of view, we develop a new approach using a microscopic model of muon capture and up-to-date particle emission models. We paid attention to the muon capture rates, the particle emission spectra, and the multiplicities that have a close interrelation with each other, and found that the nuclear many-body correlation including two-particle two-hole excitations is a key to explaining them simultaneously.