Prospects of searching for unstable nucleus states in relativistic nuclear fragmentation

TL;DR

This paper explores the potential of relativistic nuclear fragmentation experiments, particularly using nuclear emulsion methods, to study unstable nuclear states like $^{8}$Be, the Hoyle state, and isobar-analog states, providing insights into nuclear cluster physics.

Contribution

It demonstrates the application of nuclear emulsion techniques in relativistic fragmentation experiments to investigate unstable nuclear states and their formation dynamics.

Findings

Observation of $^{8}$Be and Hoyle state emergence.

Search for 4$eta$-particle condensate decay modes.

Identification of isobar-analog states in light nuclei.

Abstract

The article is dedicated to the experimental study in the relativistic approach to the problems of nuclear cluster physics for the prospects of the \href{http://becquerel.jinr.ru/}{BECQUEREL} experiment. The nuclear emulsion method applied in this experiment makes it possible to study thoroughly the relativistic final states in the fragmentation of nuclei. The focus of the presented research is the dynamics of emergence of the $^{8}$Be nucleus and the Hoyle state, as well as the search for the 4$\alpha$-particle condensate decaying via the above nuclear states. In this context, the analysis of exposure to $^{84}$Kr nuclei at 950 MeV/nucleon is shown. As a continuation of the study of light nuclei, we have demonstrated the search for the isobar-analogue state of the $ ^{13} $N nucleus in the fragmentation of $ ^{14} $N nuclei at 2 GeV/nucleon.