Special features of the $^9$Be$\to$2He fragmentation in emulsion at an energy of 1.2~A~GeV

nucl-ex

/ Authors

D. A. Artemenkov, V. Bradnova, M. M. Chernyavsky, N. A. Kachalova, A. D. Kovalenko, M. Haiduc, A. I. Malakhov, G. I. Orlova, P. A. Rukoyatkin, V. V. Rusakova

and 6 more authors

T. V. Shchedrina, E. Stan, R. Stanoeva, I. Tsakov, P. I. Zarubin, I. G. Zarubina

/ Abstract

The results of investigations of the relativistic $^9$Be nucleus fragmentation in emulsion which entails the production of two He fragments of an energy of 1.2~A~GeV are presented. The results of the angular measurements of the $^9$Be$\to$2He events are analyzed. The $^9$Be$\to^8$Be+n fragmentation channel involving the $^8$Be decay from the ground (0$^+$) and the first excited (2$^+$) states to two $α$ particles is observed to be predominant.