Unstable nuclei in coherent dissociation of relativistic nuclei 7,9Be, 10B and 10,11C

21st International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei

Artemenkov, D.A.^1 ; Bradnova, V.^1 ; Firu, E.^2 ; Kornegrutsa, N.K.^1 ; Haiduc, M.^2 ; Mamatkulov, K.Z.^1 ; Kattabekov, R.R.^1 ; Neagu, A.^2 ; Rukoyatkin, P.A.^1 ; Rusakova, V.V.^1 ; Sarkisyan, V.R.^3 ; Stanoeva, R.^4 ; Zaitsev, A.A.^1,5 ; Zarubin, P.I.^1,5 ; Zarubina, I.G.^1,5

V i Veksler and A M Baldin Laboratory of High Energy Physics, Joint Institute for Nuclear Research, Dubna, Russia^1

Institute of Space Science, Magurele, Romania^2

Yerevan Physics Institute, ARM, Yerevan, Armenia^3

South-Western University, Blagoevgrad, Bulgaria^4

P N Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia^5

关键词: Energy distributions;    Exposed to;    Nuclear tracks;    Opening angle;    Relativistic nuclei;    Unstable nuclei;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/724/1/012055/pdf
DOI  :  10.1088/1742-6596/724/1/012055

来源: IOP

【 摘 要 】

Contribution of the unstable nuclei7Be,8Be and ®B into coherent dissociation events ("white" stars) of relativistic nuclei7,9Be,10B and10,11C is under study on the basis of a nuclear track emulsion exposed to beams of the JINR Nuclotron. Distributions over the opening angle of α-pairs indicate to a simultaneous presence of virtual8Beg.s. and8Be2+states in the ground states of the9Be and10C nuclei. The core9B is manifested in the10C nucleus with a probability of (30 ± 4)%, Selection of the10C "white" stars accompanied by8Beg.s. (9B) leads to the appearance in the excitation energy distribution of 2α2p "quartets" of the distinct peak with a maximum at 4.1 ± 0.3 MeV.8Beg.s. decays are presented in 21% 2He + 2H and 19% in the 3He of the all11C "white" stars.9Bg.s. decays are identified in "white" stars11C → 2He + 2H constituting 14% of the11C "white" stars. The9B nucleus. is manifested in the "white" stars10B → 2He + 2H with a probability of (9 ± 1)%. For the10B case yield of8Beg.s. nuclei with the respect to9B is about a factor of 3 higher than9B.