Study of the Involvement of 8Be and 9B Nuclei in the Dissociation of Relativistic 10C, 10B, and 12C Nuclei


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Abstract

The results obtained by estimating the contribution of 8Be and 9B nuclei to the coherent dissociation of 10C, 10B, and 12C relativistic nuclei in nuclear track emulsions (“white” stars) are presented. The selection of white stars accompanied by 9B leads to a distinct peak appearing in the distribution of the excitation energy of 2α2p ensembles and having a maximum at 4.1 ± 0.3 MeV. A 8Be nucleus manifests itself in the coherent-dissociation reaction 10B → 2He + H with a probability of (25 ± 5)%, (14 ± 3)% of it being due to 9B decays. The ratio of the branching fractions of the 9B + n and 9Be + p mirror channels is estimated at 6 ± 1. An analysis of the relativistic dissociation of 12C nuclei in a nuclear track emulsion revealed nine 3α events corresponding to the Hoyle state.

About the authors

D. A. Artemenkov

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

V. Bradnova

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

G. I. Britvich

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

A. A. Zaitsev

Joint Institute for Nuclear Research; Lebedev Physical Institute

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980; Leninskii pr. 53, Moscow, 119991

P. I. Zarubin

Joint Institute for Nuclear Research; Lebedev Physical Institute

Author for correspondence.
Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980; Leninskii pr. 53, Moscow, 119991

I. G. Zarubina

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

V. A. Kalinin

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

R. R. Kattabekov

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

N. K. Kornegrutsa

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

M. Yu. Kostin

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

A. V. Maksimov

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

K. Z. Mamatkulov

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

E. Mitseva

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

A. Neagu

Institute of Space Science

Email: zarubin@lhe.jinr.ru
Romania, Bucharest-Magurele, 077125

V. A. Pikalov

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

M. K. Polkovnikov

Institute for High Energy Physics

Email: zarubin@lhe.jinr.ru
Russian Federation, pl. Nauki 1, Protvino, Moscow oblast, 142280

P. A. Rukoyatkin

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

V. V. Rusakova

Joint Institute for Nuclear Research

Email: zarubin@lhe.jinr.ru
Russian Federation, ul. Joliot-Curie 6, Dubna, Moscow oblast, 141980

V. R. Sarkisyan

Yerevan Physics Institute (YerPhI)

Email: zarubin@lhe.jinr.ru
Armenia, Alikhanian Brothers Str. 2, Yerevan, 0036

R. Stanoeva

South-Western University; Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences

Email: zarubin@lhe.jinr.ru
Bulgaria, Blagoevgrad; 72 Tsarigradsko Chaussee, Sofia, 1784

E. Firu

Institute of Space Science

Email: zarubin@lhe.jinr.ru
Romania, Bucharest-Magurele, 077125

M. Haiduc

Institute of Space Science

Email: zarubin@lhe.jinr.ru
Romania, Bucharest-Magurele, 077125

S. P. Kharlamov

Lebedev Physical Institute

Email: zarubin@lhe.jinr.ru
Russian Federation, Leninskii pr. 53, Moscow, 119991

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