Dissociation of Relativistic $^{10}$B Nuclei in Nuclear Track Emulsion

TL;DR

This study investigates the dissociation of relativistic $^{10}$B nuclei in nuclear track emulsion, revealing dominant fragmentation channels and the formation probabilities of unstable nuclear states at high energy.

Contribution

It provides detailed measurements of fragmentation channels and unstable nucleus formation in $^{10}$B dissociation at 1 A GeV, using nuclear track emulsion.

Findings

78% of dissociations produce 2He + H fragments.

26% of events involve $^{8}$Be$_{g.s.}$ formation.

14% involve $^{9}$B$_{g.s.}$ decays.

Abstract

The structural features of $^{10}$B are studied by analyzing the dissociation of nuclei of this isotope at an energy of 1 A GeV in nuclear track emulsion. The fraction of the $^{10}$B $\to$ 2He + H channel in the charge state distribution of fragments is 78\%. It was determined based on the measurements of fragment emission angles that unstable $^{8}$Be$_{g.s.}$ nuclei appear with a probability of (26 $\pm$ 4)\%, and (14 $\pm$ 3)\% of them are produced in decays of an unstable $^9$B$_{g.s.}$ nucleus. The Be + H channel was suppressed to approximately 1\%.