The 12C* Hoyle state in the inelastic 12C + 12C reaction and in 24Mg* decay. (23rd February 2016)

• Record Type: Journal Article
• Authors: Morelli, L; Bruno, M; D'Agostino, M; Baiocco, G; Gulminelli, F; Abbondanno, U; Barlini, S; Bini, M; Casini, G; Cinausero, M; Degerlier, M; Fabris, D; Gramegna, F; Mabiala, J; Marchi, T; Olmi, A; Pasquali, G; Piantelli, S; Valdré, S
• Is Part Of: Journal of physics. Volume 43:Number 4(2016:Apr.)
• Publication Date: 2016-02-23
• Subjects: nuclear reactions -- 12C* excited states -- Hoyle state decay; 26.60.+e -- 27.20.+n -- 29.30.Ep; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/0954-3899/43/4/045110
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: The reaction 12 C + 12 C at 95 MeV has been studied at the Legnaro Laboratories of INFN with the GARFIELD + RCo apparatus. Data have been analyzed in order to investigate the decay of the Hoyle state of 12 C*. Two different data selections have been made. The first one corresponds to peripheral binary collisions where the quasi-projectile is excited to the Hoyle state and the target has been left in the ground state. The second selection allows for studying central events with the formation of a 24 Mg* and the Hoyle state is obtained as a step of the decay chain. The characteristics of the Hoyle state decay are very similar in the two samples and point to a mainly sequential decay through the population of an intermediate 8 Begs, with a small contribution (∼1.1%) from simultaneous three α -particle processes.