Clustering in relativistic dissociation of $^9$be, $^9$c, $^{10}$c and   $^{12}$n nuclei
  The dissociation features in nuclear track emulsion of $^9$Be, $^{9,10}$C, and $^{12}$N nuclei of 1.2 A GeV energy are presented. The data presented for the nucleus $^9$Be can be considered as evidence that there is a core in its structure in the form of 0$^+$ and 2$^+$ states of the $^8$Be nucleus having roughly equal weights. Events of coherent dissociation $^9$C$\rightarrow 3^3$He associated with the rearrangement of the nucleons outside the $\alpha$-clustering are identified. A pattern of the charge fragment topology in the dissociation of $^{10}$C and $^{12}$N nuclei is obtained for the first time. Contribution of the unbound nucleus decays to the cascade process $^{10}$C$\rightarrow ^9$B$\rightarrow ^8$Be is identified. 
D.A. Artemenkov, V. Bradnova, R.R. Kattabekov, K.Z. Mamatkulov, N.K.   Kornegrutsa, D.O. Krivenkov, A.I. Malakhov, P.A. Ruko...
nucl-ex