Direct evidence of α-particle condensation for the Hoyle state

Abstract : The fragmentation of quasi-projectiles from the nuclear reaction 40Ca+12C at 25 MeV/nucleon was used to produce excited states candidates to α-particle condensation. Complete kinematic characterization of individual decay events, made possible by the CHIMERA high-granularity 4π charged particle multi-detector, reveals that 7.5±4.0 % of the Hoyle state particle decays correspond to direct decays in three equal-energy α-particles. Moreover, events with increased kinetic energy dispersion in the 12C center of mass, which amount to 9.5±4.0 %, point toward the occurrence of a second competing molecular configuration, of a linear α-chain.
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Conference papers
International Workshop on multifragmentation and Related Topics - IWM 2011, Nov 2011, Caen, France. 31, pp.00034, <10.1051/epjconf/20123100034>


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Submitted on : Tuesday, September 11, 2012 - 3:00:47 PM
Last modification on : Wednesday, September 12, 2012 - 12:00:54 PM

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Ad.R. Raduta, B. Borderie, E. Geraci, N. Le Neindre, P. Napolitani, et al.. Direct evidence of α-particle condensation for the Hoyle state. International Workshop on multifragmentation and Related Topics - IWM 2011, Nov 2011, Caen, France. 31, pp.00034, <10.1051/epjconf/20123100034>. <in2p3-00730977>

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