Particles and Nuclei International Conference - PANIC 2021, PoS(PANIC2021)219

This article is dedicated to the results of early measuring fragmentation of relativistic , , , and nuclei in a nuclear track emulsion. It has been found that there is a contribution of the unstable nucleus decays to -particle multiplicities. These renewed measurements of nuclear track emulsion exposed to nuclei at the energy of MeV per nucleon have been analyzed and given below.