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

  • XIV International Seminar on Electromagnetic Interactions of Nuclei “EMIN-2015” Moscow, October 5–8, 2015
  • Published:
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Abstract

A role of the unstable nuclei 6Be, 8Be and 9B in the dissociation of relativistic nuclei 7,9Be, 10B and 10,11C is under study on the basis of nuclear track emulsion exposed to secondary beams of the JINR Nuclotron. Contribution of the configuration 6Be + n to the 7Be nucleus structure is 8 ± 1% which is near the value for the configuration 6Li + p. Distributions over the opening angle of α-particle pairs indicate to a simultaneous presence of virtual 8Beg.s. and 8Be2+ states in the ground states of the 9Be and 10C nuclei. The core 9B is manifested in the 10C nucleus with a probability of 30 ± 4%. Selection of the 10C “white” stars accompanied by 8Beg.s. (9B) leads to 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 24 ± 7% of 2He + 2H events of the 11C coherent dissociation and 27 ± 11% of the 3He ones. The channel 9B + H amounts 14 ± 3%. The 8Bg.s. nucleus is manifested in the coherent dissociation 10B → 2He + H with a probability of 25 ± 5% including 13 ± 3% of 9B decays. A probability ratio of the mirror channels 9B + n and 9Be + p is estimated to be 10 ± 1.

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Authors and Affiliations

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

    D. A. Artemenkov, A. A. Zaitsev & P. I. Zarubin

  2. P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia

    A. A. Zaitsev & P. I. Zarubin

Authors
  1. D. A. Artemenkov
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  2. A. A. Zaitsev
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  3. P. I. Zarubin
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Correspondence to P. I. Zarubin.

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Artemenkov, D.A., Zaitsev, A.A. & Zarubin, P.I. Unstable nuclei in dissociation of light stable and radioactive nuclei in nuclear track emulsion. Phys. Part. Nuclei 48, 147–157 (2017). https://doi.org/10.1134/S1063779617010026

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