Investigation of the surrogate-reaction method via the simultaneous measurement of gamma-emission and fission probabilities
1 CENBG, CNRS/IN2P3-Université de Bordeaux, Chemin du Solarium, BP. 120, 33175 Gradignan, France
2 IPN d’Orsay, Bâtiment 100, 15 rue G. Clemenceau, 91406 Orsay Cedex, France
3 CELIA, 43 rue Pierre Noailles, 33405 Talence Cedex, France
4 CEA DAM DIF, 91297 Arpajon, France
5 Department of Physics, University of Oslo, 0316 Oslo, Norway
6 LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble Cedex, France
7 Fundamental Fysik, Chalmers Tekniska Högskola, 41296 Göteborg, Sweden
8 EC-JRC, IRMM, Retieseweg 111, 2440 Geel, Belgium
9 CEA-Cadarache, DEN/DER/SPRC/LEPh, 13108 Saint-Paul-lez-Durance, France
a e-mail: firstname.lastname@example.org
Published online: 13 September 2017
We present the results of two experiments where we have measured for the first time simultaneously the fission and gamma-decay probabilities induced by different surrogate reactions. In particular, we have investigated the 238U(d,p), 238U(3He,t) and 238U(3He,4He) reactions as surrogates for the neutron-induced n + 238U, n + 237Np and n + 236U reactions, respectively. In the region where gamma emission, neutron emission and fission compete, our results for the fission probabilities agree fairly well with the neutron-induced data, whereas our gamma-decay probabilities are significantly higher than the neutron-induced data. The interpretation of these results is not obvious and is discussed within the framework of the statistical model with preliminary results for calculated spin-parity distributions populated in surrogate reactions. We also present future plans for surrogate-reaction studies in inverse kinematics with radioactive-ion beams at storage rings.
© The Authors, published by EDP Sciences, 2017
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