Dissipative effects in fission investigated in complete kinematics measurements
1 Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
2 CEA, DAM, DIF, 91297 Arpajon, France
3 Institut de Physique Nucléaire d'Orsay, 91406 Orsay, France
4 Universidad de Vigo, 36200 Vigo, Spain
5 Chalmers University of Technology, 412 96 Gothenburg, Sweden
6 GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
7 Grand Accélérateur National d'Ions Lourds, 14076 Caen, France
a e-mail: email@example.com
Published online: 13 September 2017
The study of dissipative effects in fission has been carried out with fusion-fission reactions by using a limited number of observables, such as the fission probabilities, the mass distribution of the fission fragments, or the neutron multiplicities. However, the large angular momenta gained by the compound nucleus in this kind of reaction could affect the conclusions drawn from such experiments. In this work, we propose to investigate the fission dynamics by the use of spallation reactions on 208Pb because the fissioning systems are produced with low angular momentum, small deformations, and high excitation energies, enhancing the dissipative effects. The complete kinematics measurements of the fission fragments and light-charged particles were performed by the use of the SOFIA setup combined with the inverse kinematics technique, allowing us for the first time a full indentification in atomic and mass number of the two fission fragments. These measurements permit us to define new fission observables for the investigation of the temperature and deformation dependencies of the dissipation parameter.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.