Application of Nuclear Track Emulsion in Search for the Hoyle State in Dissociation of Relativistic 12C Nuclei


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Abstract

In dissociation in nuclear track emulsion of 4.5 and 1 A GeV/c12C nuclei, the formation of triplets of α particles in the Hoyle state (the second excited state 0+) is observed. This state is identified by the invariant mass, calculated from pair angles in the α triples in approximation of conservation of momentum per nucleon of the parent nucleus. An estimate of the contribution of the Hoyle state to the dissociation of 12C→ 3α is 10–15%.

About the authors

A. A. Zaitsev

Veksler and Baldin Laboratory of High Energy Physics; Lebedev Physical Institute

Email: zarubin@lhe.jinr.ru
Russian Federation, Dubna, Moscow oblast, 141980; Moscow

P. I. Zarubin

Veksler and Baldin Laboratory of High Energy Physics; Lebedev Physical Institute

Author for correspondence.
Email: zarubin@lhe.jinr.ru
Russian Federation, Dubna, Moscow oblast, 141980; Moscow

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