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The 12C* Hoyle state in the inelastic 12C + 12C reaction and in 24Mg* decay

Abstract : The reaction 12C + 12C 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 12C*. 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 24Mg* 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 8Begs, with a small contribution (~1.1%) from simultaneous three α-particle processes.
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L. Morelli, M. Bruno, M. D’agostino, G. Baiocco, F. Gulminelli, et al.. The 12C* Hoyle state in the inelastic 12C + 12C reaction and in 24Mg* decay. Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, 2016, 43 (4), pp.45110. ⟨10.1088/0954-3899/43/4/045110⟩. ⟨in2p3-01293418⟩

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