A nuclear track emulsion was exposed to a mixed beam of relativistic
12N, 10C, and 7Be nuclei having a momentum of 2 GeV/c per
nucleon. The beam was formed upon charge exchange processes involving 12C
primary nuclei and their fragmentation. An analysis indicates that 10C
nuclei are dominant in the beam and that 12N nuclei are present in it. The
charge topology of relativistic fragments in the coherent dissociation of these
nuclei is presented.Comment: ISSN 1063-7788, Pleiades Publishing, Ltd., 201