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Direct evidence of α-particle condensation for the Hoyle state
Raduta A., Borderie B., Geraci E., Le Neindre N., Napolitani P. et al
in EPJ Web of Conferences - International Workshop on multifragmentation and Related Topics - IWM 2011, Caen : France (2011) - http://hal.in2p3.fr/in2p3-00730977
Physique/Physique Nucléaire Expérimentale
Direct evidence of α-particle condensation for the Hoyle state
Ad.R. Raduta1, B. Borderie1, E. Geraci, N. Le Neindre1, 2, P. Napolitani1, M.F. Rivet1
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
http://ipnweb.in2p3.fr
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
France
2 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
http://www.lpc-caen.in2p3.fr/
CNRS : UMR6534 – IN2P3 – Université de Caen Basse-Normandie – Ecole Nationale Supérieure d'Ingénieurs de Caen
ENSICAEN - 6, boulevard du Marechal Juin 14050 Caen Cedex
France
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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2012
2011
EPJ Web of Conferences
internationale
31
00034

International Workshop on multifragmentation and Related Topics - IWM 2011
Caen
France
02/11/2011
05/11/2011