Correlation in formation of ${}^8$Be nuclei and $\alpha$-particles in fragmentation of relativistic nuclei

Abstract

In the events of peripheral dissociation of relativistic nuclei in the nuclear track emulsion, it is possible to study the emerging ensembles of He and H nuclei, including those from decays of unstable ${}^8$Be and ${}^9$B nuclei, as well as the Hoyle state. These extremely short-lived states are identified by invariant masses calculated from the angles in 2$\alpha$-pairs, 2$\alpha p$- and 3$\alpha$-triplets in the approximation of conservation of momentum per nucleon of the primary nucleus. In the same approach, it is possible to search for more complex states. This paper explores the correlation between the formation of ${}^8$Be nuclei and the multiplicity of accompanying $\alpha$-particles in the dissociation of relativistic ${}^{16}$O, ${}^{22}$Ne, ${}^{28}$Si, and ${}^{197}$Au nuclei. On the above basis, estimates of this correlation are presented for the unstable ${}^9$B nucleus and the Hoyle state. The enhancement in the ${}^8$Be contribution to dissociation with the $\alpha$-particle multiplicity has been found. Decays of ${}^9$B nuclei and Hoyle states follow the same trend.

References in corpus (5)

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• A stringent upper limit on the direct 3$\alpha$ decay of the Hoyle State in ${}^{12}$C
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Cited by in corpus (8)

• Prospects of searching for unstable nucleus states in relativistic nuclear fragmentation
• 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
• Bose-Einstein condensation in finite drops of alpha particles
• Brief review on unstable states in dissociation of relativistic nuclei
• On formation of the ${}^{12}$C(0${}_2^{+}$) and ${}^{12}$C(3${}^{-}$) states in relativistic dissociation of light nuclei
• The ${}^8$Be nucleus and the Hoyle state in dissociation of relativistic nuclei