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Asymmetric fission in 78Kr+40Ca reactions at 5.5 MeV/nucleon
Wieleczko J.P., Ademard G., Mazurek K., Schmitt C., Bonnet E. et al
Dans EPJ Web of Conferences - Third International Workshop on Compound Nuclear Reactions and Related Topics (CNR11), Prague : Tchèque, République (2011) - http://hal.in2p3.fr/in2p3-00625611
Physique/Physique Nucléaire Expérimentale
Asymmetric fission in 78Kr+40Ca reactions at 5.5 MeV/nucleon
J.P. Wieleczko1, G. Ademard1, K. Mazurek1, C. Schmitt1, E. Bonnet1, A. Chbihi1, J.D. Frankland1, J. Gomez del Campo, M. La Commara, M. Vigilante, E. Rosato, G. Spadaccini, C. Beck2, S. Barlini, B. Borderie3, R. Bougault4, R. Dayras5, G. De Angelis, J. De Sanctis, V.L. Kravchuk, P. Lautesse6, N. Le Neindre4, A. D'Onofrio, M. Pârlog4, D. Pierroutsakou, M. Romoli, R. Roy
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
http://www.ganil-spiral2.eu
CNRS : UPR3266 – IN2P3 – CEA : DSM/GANIL
Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5
France
2 :  IPHC - Institut Pluridisciplinaire Hubert Curien
CNRS : UMR7178 – Université de Strasbourg
France
3 :  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
4 :  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
5 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
CEA : DSM/IRFU
France
6 :  IPNL - Institut de Physique Nucléaire de Lyon
http://www.ipnl.in2p3.fr/
CNRS : UMR5822 – IN2P3 – Université Claude Bernard - Lyon I (UCBL)
France
Dynamique et thermodynamique nucléaire
Decay modes of excited nuclei formed in the 78,82Kr+40Ca reactions at 5.5 AMeV are investigated by means of exclusive measurements using the INDRA detector at GANIL. Light‐charged particles in coincidence with fragments show that, in the mechanism of asymmetric fission, the light partner (with atomic number 6≤Z≤10) is produced at excitation energy below the emission particle threshold. This result provides important constraints on various key characteristics of the process as the energetic balance, the sharing of the excitation energy and the fragments cross‐sections indicate the influence of the nuclear level density at excitation energy below the emission threshold. Comparison with statistical and dynamical models suggests the role of multichance emission to explain the observed feature of the fragment cross‐sections. The set of data provides some hints for further explorations in the context of reactions induced with neutron rich projectile to be delivered in future facilities.

Communications avec actes
2012
19/09/2011
EPJ Web of Conferences
non spécifiée
21
02001

Third International Workshop on Compound Nuclear Reactions and Related Topics (CNR11)
Prague
Tchèque, République
19/09/2011
23/09/2011
J.P. Wieleczko

GANIL 2012-018 A
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