Unstable states in dissociation of relativistic nuclei. Recent findings and prospects of researches

Abstract

The invariant mass method is used to identify the ${}^8$Be and ${}^9$B nuclei and Hoyle state formed in dissociation of relativistic nuclei in a nuclear track emulsion. It is shown that to identify these extremely short-lived states in the case of the isotopes ${}^9$Be, ${}^{10}$B, ${}^{10}$C, ${}^{11}$C, ${}^{12}$C, and ${}^{16}$O, it is sufficient to determine the invariant mass as a function of the angles in pairs and triples of He and H fragments in the approximation of the conservation of momentum per nucleon of the parent nucleus. According to the criteria established in this way, the contribution of these three unstable states was evaluated in the relativistic fragmentation of the ${}^{28}$Si and ${}^{197}$Au nuclei.

arXiv commentTo be published in the European Physical Journal A. Topical issue "Light Clusters in Nuclei and Nuclear Matter: Nuclear Structure and Decay, Heavy Ion Collisions, and Astrophysics"

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Cited by in corpus (10)

• Correlation in formation of ${}^8$Be nuclei and $\alpha$-particles in fragmentation of relativistic nuclei
• Phase diagram of alpha matter with Skyrme-like scalar interaction
• Prospects of searching for unstable nucleus states in relativistic nuclear fragmentation
• Search for decays of the ${}^9$B nucleus and Hoyle state in ${}^{14}$N nucleus dissociation
• 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
• Enhanced production of ${}^8$Be nuclei in relativistic nuclei fragmentation
• On formation of the ${}^{12}$C(0${}_2^{+}$) and ${}^{12}$C(3${}^{-}$) states in relativistic dissociation of light nuclei
• Brief review on unstable states in dissociation of relativistic nuclei
• The ${}^8$Be nucleus and the Hoyle state in dissociation of relativistic nuclei