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

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${}_{g\mathrm{.}s\mathrm{.}}$ nuclei appear with a probability of (26 $\pm$ 4)%, and (14 $\pm$ 3)% of them are produced in decays of an unstable ${}^9$B${}_{g\mathrm{.}s\mathrm{.}}$ nucleus. The Be + H channel was suppressed to approximately 1%.