/ Experiment-Nucl arXiv:0704.0384

Clustering features of Be-9, N-14, Be-7, and B-8 nuclei in relativistic fragmentation

Artemenkov, D.A. (Dubna, JINR) ; Shchedrina, T.V. (Dubna, JINR) ; Stanoeva, R. (Dubna, JINR) ; Zarubin, P.I. (Dubna, JINR)

Published in: AIP Conf.Proc.
Year: 2007
Vol.: 912
Page No: 78-87 / 78-87
Pages: 14

Abstract: Recent studies of clustering in light nuclei with an initial energy above 1 A GeV in nuclear treack emulsion are overviewed. The results of investigations of the relativistic $^9$Be nuclei fragmentation in emulsion, which entails the production of He fragments, are presented. It is shown that most precise angular measurements provided by this technique play a crucial role in the restoration of the excitation spectrum of the $\alpha$ particle sysytem. In peripheral interactions $^9$Be nuclei are dissociated practically totally through the 0$^+$ and 2$^+$ states of the $^8$Be nucleus. The results of investigations of the dissociation of a $^{14}$N nucleus of momentum 2.86 A GeV/c in emulsion are presented as example of more complicated system. The momentum and correlation characteristics of $\alpha$ particles for the $^{14}$N$\to3\alpha+X$ channel in the laboratory system and the rest systems of 3$\alpha$ particles were considered in detail. Topology of charged fragments produced in peripheral relativistic dissociation of radioactive $^8$B, $^7$Be nuclei in emulsion is studied.

Keyword(s): nuclear cluster model ; nuclei with mass number 6 to 19 ; beryllium ; nitrogen ; boron ; nuclear fragmentation

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