Search for decays of the $^{9}$B nucleus and Hoyle state in $^{14}$N nucleus dissociation

Abstract

First results of an analysis to determine contribution of decays of the unstable 8 Be and 9 B nuclei and the Hoyle 3α-state to dissociation of 14 N → 3He (+H) are presented. As the research material, layers of nuclear track emulsion longitudinally exposed to 2.9 A GeV/c 14 N nuclei with at the JINR Nuclotron. Under the assumption that the He and H fragments retain momentum per nucleon of the primary nucleus, these unstable states are identified by the invariant mass calculated from the emission angles of the fragments.