First results on the interactions of relativistic $^9$C nuclei in   nuclear track emulsion
  \indent First results of the exposure of nuclear track emulsions in a secondary beam enriched by $^9$C nuclei at energy of 1.2 A GeV are described. The presented statistics corresponds to the most peripheral $^9$C interactions. For the first time a dissociation $^9$C $\to3^3$He not accompanied by target fragments and mesons is identified.\par 
D. O. Krivenkov, D. A. Artemenkov, V. Bradnova, M. Haiduc, S. P.   Kharlamov, V. N. Kondratieva, A. I. Malakhov, A. A. Moise...