Nuclear track emulsion in search for the Hoyle-state in dissociation of relativistic ${}^{12}$C nuclei

Abstract

Production of ensembles of $\alpha$-particle triples associated with the Hoyle state (the second excited state of the ${}^{12}$C nucleus) in peripheral dissociation of relativistic ${}^{12}$C nuclei is studied. Stacks of nuclear track emulsion pellicles exposed to ${}^{12}$C with an energy from hundreds MeV to a few GeV per nucleon serve as the material for studies. The Hoyle state decays are reconstructed via measurement of emission angles of $\alpha$ particles with the precision sufficient for identification of the unstable ${}^8$Be nucleus. The estimate of the contribution of Hoyle's state to the ${}^{12}$C $\to$ 3$\alpha$ dissociation is 10-15\%.

arXiv comment12 pages, 11 figures, 1 table

References in corpus (3)

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Cited by in corpus (8)

• Unstable states in dissociation of relativistic nuclei. Recent findings and prospects of researches
• Correlation in formation of ${}^8$Be nuclei and $\alpha$-particles in fragmentation of relativistic nuclei
• The Hoyle state in relativistic dissociation of light nuclei
• Highlights of Unstable States in Relativistic Dissociation of Light Nuclei in Nuclear Emulsion
• An enhancement of formation of unstable ${}^8$Be nucleus with the growth of $\alpha$-particle multiplicity in fragmentation of relativistic nuclei
• Brief review on unstable states in dissociation of relativistic nuclei
• The ${}^8$Be nucleus and the Hoyle state in dissociation of relativistic nuclei
• Prospects of nuclear clustering studies via dissociation of relativistic nuclei in nuclear track emulsion