Decay of excited nuclei produced in the 78,82Kr+40Ca reactions at 5.5 MeV/nucleon

G. Ademard; J.P. Wieleczko; J. Gomez del Campo; M. LaCommara; E. Bonnet; M. Vigilante; A. Chbihi; J.D. Frankland; E. Rosato; G. Spadaccini; Sh.A. Kalandarov; C. Beck; S. Barlini; B. Borderie; R. Bougault; R. Dayras; G. De Angelis; J. De Sanctis; V.L. Kravchuk; P. Lautesse; N. Le Neindre; J. Moisan; A. D’Onofrio; M. Parlog; D. Pierroutsakou; M. Romoli; R. Roy; G.G. Adamian; N.V. Antonenko

doi:10.1051/epjconf/20111710005

All issues

Volume 17 (2011)

EPJ Web of Conferences, 17 (2011) 10005

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 17, 2011 5^th International Conference FUSION11


Article Number		10005
Number of page(s)		4
Section		Session 10 Chairperson Zhang H.
DOI		https://doi.org/10.1051/epjconf/20111710005
Published online		19 October 2011

EPJ Web of Conferences 17, 10005 (2011)
https://doi.org/10.1051/epjconf/20111710005

Decay of excited nuclei produced in the ^78,82Kr+⁴⁰Ca reactions at 5.5 MeV/nucleon

G. Ademard¹^a, J.P. Wieleczko¹, J. Gomez del Campo², M. LaCommara³^,4, E. Bonnet¹, M. Vigilante³^,4, A. Chbihi¹, J.D. Frankland¹, E. Rosato³^,4, G. Spadaccini³^,4, Sh.A. Kalandarov⁵^,6, C. Beck⁷, S. Barlini⁸, B. Borderie⁹, R. Bougault¹⁰, R. Dayras¹¹, G. De Angelis¹², J. De Sanctis¹³, V.L. Kravchuk¹², P. Lautesse¹⁴, N. Le Neindre¹⁰, J. Moisan¹^,15, A. D’Onofrio¹⁶, M. Parlog¹⁰, D. Pierroutsakou⁴, M. Romoli⁴, R. Roy¹⁵, G.G. Adamian⁵^,6 and N.V. Antonenko⁵

¹ Grand Accélérateur National d’Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Bvd H. Becquerel, 14076, Caen, France
² Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
³ Dipartimento di Scienze Fisiche, Università di Napoli ”Federico II”, I-80126, Napoli, Italy
⁴ INFN, Sezione di Napoli, I-80126, Napoli, Italy
⁵ Joint Institute for Nuclear Research, 141980 Dubna, Russia
⁶ Institute of Nuclear Physics, 702132 Tashkent, Uzbekistan
⁷ IPHC, IN2P3-CNRS and Université Strasbourg, F-67037, Strasbourg Cedex2, France
⁸ INFN, Sezione di Firenze, I-50125 Firenze, Italy
⁹ IPNO, IN2P3-CNRS and Université Paris-Sud 11, F-91406, Orsay Cedex, France
¹⁰ LPC, IN2P3-CNRS, ENSICAEN and Université, F-14050, Caen Cedex, France
¹¹ CEA, IRFU, SPhN, CEA/Saclay, F-91191, Gif-sur-Yvette Cedex, France
¹² INFN, LNL, I-35020 Legnaro ( Padova ) Italy
¹³ INFN, Sezione di Bologna, I-40127 Bologna, Italy
¹⁴ IPNL, IN2P3-CNRS et Université, F-69622, Villeurbanne Cedex, France
¹⁵ Laboratoire de Physique Nucléaire, Université de Laval, Québec, Canada
¹⁶ Dipartimento di Scienze Ambientali, Seconda Università di Napoli, I-81100, Caserta, Italy

^a e-mail: ademard@ganil.fr

Abstract

Decay modes of excited nuclei are studied in ^78,82Kr + ⁴⁰Ca reactions at 5.5 MeV/nucleon by means of light-charged particles measured in coincidence with intermediate mass fragments and fission-like fragments. Inclusive cross-section distributions of fragments with charge 3 ≤ Z ≤ 28 are bell-shaped and a strong oddeven-staggering (o-e-s) is observed for 3 ≤ Z ≤ 12. Coincidence measurements suggest that the light partners in very asymmetric ﬁssion are emitted at excitation energies below the particle emission thresholds. Data were confronted to the predictions of statistical models describing the decay of compound nuclei by emission of light particles and fragments. Comparison with models suggests that the o-e-s of the light-fragment yields is mainly due to the successive steps of compound nucleus disintegration.

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