Dissociation of 10C nuclei in a track nuclear emulsion at an energy of 1.2 GeV per nucleon

Abstract

The charge topology in the fragmentation of 10 C nuclei in a track nuclear emulsion at an energy of 1.2 GeV per nucleon is studied. In the coherent dissociation of 10 C nuclei, about 82% of events are associated with the channel 10 C → 2α+ 2p. The angular distributions and correlations of product fragments are presented for this channel. It is found that among 10 C → 2α+ 2p events, about 30% are associated with the process in which dissociation through the ground state of the unstable 9 Beg.s. nucleus is followed by 8 Beg.s.+ p decays.

‘‘Tomography’’ of the Cluster Structure of Light Nuclei via Relativistic Dissociation

“…The values pβc4 He were measured for H and He tracks of 16 "white" stars 10 C → 2He + 2H in the NTE exposed to a mixed beam of isotopes 7 Be, 10 C and 12 N [ [25][26][27] with the same momentum per nucleon as in the case of 9 C. The dominance of 1 H and 4 He isotopes confirms the separation of 10 C (Fig. 7).…”

“…for events Z f r = 6 and 7 is shown in Fig. 6 [25][26][27]. In cases of light neutron-deficient nuclei the determination of charges allows one to determine their mass numbers.…”

Unstable nuclei in dissociation of light stable and radioactive nuclei in nuclear track emulsion

“…Contribution of the unstable nuclei 6 Be, 8 Be and 9 B into dissociation of relativistic nuclei 7,9 Be, 10 B and 10,11 C is under study on the basis of the nuclear track emulsion exposed to secondary beams of the JINR Nuclotron.…”

“…Their ratio is equal to 0.7 ± 0.1 [11]. Recently obtained statistics of 140 10 B "white" stars is presented in The unstable nuclei in dissociation of the 9 Be, 10 Earlier, basing on the Q αp energy distribution of the triples 2α + p from the "white" stars 10 C → 2α + 2p it is concluded that in the 10 C nucleus the core 9 B is manifested with a probability of 30 ± 4%, and the 8 Be g.s. decays are arise always through the 9 B…”

Charge topology of the coherent dissociation of relativistic 11C and 12N nuclei

“…The interaction of virtual helium isotopes and neutron exchange between them in the 11 C nucleus lead to the formation of cluster structures, including the 2 4 He + 3 He configuration. Among them, configurations characterized by low binding energies, such as 7 Be + α (7.6 MeV), 10 B + p (8.7 MeV) and 3 He + 8 Be (9.2 MeV), are expected to be more probable than the 9 9 Be + 2p (15.3 MeV) and 8 Because of a wide variety of virtual cluster configurations that may exist in the structure of the 11 C nucleus, investigation of this nucleus becomes an interesting problem in and of itself.…”