Sequential fissions of heavy nuclear systems
1 GANIL, CEA-DSM/CNRS-IN2P3, Bvd. Henri Becquerel, 14076 Caen Cedex, France
2 Département de physique, de génie physique et d'optique, Université Laval, Québec, G1V 0A6 Canada
3 École des Applications Militaires de l'énergie Atomique, BP. 19, 50115 Cherbourg, France
4 The Niewodniczański Institute of Nuclear Physics – PAN, 31-342 Kraków, Poland
5 Omsk State University, Mira prospekt 55-A, Omsk 644077, Russia
a e-mail: firstname.lastname@example.org
Published online: 13 December 2013
In 129Xe + natSn central collisions from 12 to 20 MeV/A measured with the INDRA 4π multidetector, the three-fragment exit channel occurs with a significant cross section. In this contribution, we show that these fragments arise from two successive binary splittings of a heavy composite system. Strong Coulomb proximity effects are observed in the three-fragment final state. By comparison with Coulomb trajectory calculations, we show that the time scale between the consecutive break-ups decreases with increasing bombarding energy, becoming compatible with quasi-simultaneous multifragmentation above 18 MeV/A.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.