Unstable Nuclei In Coherent Dissociation Of Relativistic Nuclei Be-7,Be-9, B-10 And C-10,C-11

Contribution of the unstable nuclei Be-7, Be-8 and B-9 into coherent dissociation events ("white" stars) of relativistic nuclei Be-7,Be-9, B-10 and C-10,C-11 is under study on the basis of a nuclear track emulsion exposed to beams of the JINR Nuclotron. Distributions over the opening angle of alpha-pairs indicate to a simultaneous presence of virtual Be-8(g.s). and Be-8(2+) states in the ground states of the Be-9 and C-10 nuclei. The core B-9 is manifested in the C-10 nucleus with a probability of (30 +/- 4)%, Selection of the C-10 "white" stars accompanied by Be-8(g.s). (B-9) leads to the appearance in the excitation energy distribution of 2 alpha 2p "quartets" of the distinct peak with a maximum at 4.1 +/- 0.3 MeV. (8)Beg.s. decays are presented in 21% 2He + 2H and 19% in the 3He of the all C-11 "white" stars. B-9(g.s). decays are identified in "white" stars C-11 -> 2He + 2H constituting 14% of the C-11 "white" stars. The B-9 nucleus. is manifested in the "white" stars B-10 -> 2He + 2H with a probability of ( 9 +/- 1)%. For the B-10 case yield of Be-8(g.s) nuclei with respect to B-9 is about a factor of 3 higher than B-9.