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

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 $\alpha$ particles is observed to be predominant.

10 pages, 6 figures, conference: Conference on Physics of Fundamental Interactions, Moscow, Russia, 5-9 Dec 2005 (Author's translation)

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