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arXiv · 2409.16164

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

D. A. Artemenkov·V. Bradnova·G. I. Britvich·A. A. Zaitsev·P. I. Zarubin·I. G. Zarubina·V. A. Kalinin·R. R. Kattabekov·N. K. Kornegrutsa·M. Yu. Kostin·A. V. Maksimov·K. Z. Mamatkulov·E. Mitseva·A. Neagu·V. A. Pikalov·M. K. Polkovnikov·P. A. Rukoyatkin·V. V. Rusakova·V. R. Sarkisyan·R. Stanoeva·E. Firu·M. Haiduc·S. P. Kharlamov
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Abstract

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

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D. A. Artemenkov, V. Bradnova, G. I. Britvich, A. A. Zaitsev, P. I. Zarubin, I. G. Zarubina, V. A. Kalinin, R. R. Kattabekov, N. K. Kornegrutsa, M. Yu. Kostin, A. V. Maksimov, K. Z. Mamatkulov, E. Mitseva, A. Neagu, V. A. Pikalov, M. K. Polkovnikov, P. A. Rukoyatkin, V. V. Rusakova, V. R. Sarkisyan, R. Stanoeva, E. Firu, M. Haiduc, S. P. Kharlamov. 2024-09-24. Study of the Involvement of $^8$Be and $^9$B Nuclei in the Dissociation of Relativistic $^{10}$C, $^{10}$B, and $^{12}$C Nuclei. https://doi.org/10.1134/s1063778817060047

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