Investigation of the surrogate-reaction method via the simultaneous measurement of gamma-emission and fission probabilities

Abstract : 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.
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Submitted on : Wednesday, November 8, 2017 - 12:36:14 PM
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B. Jurado, P. Marini, L. Mathieu, M. Aiche, S. Czájkowski, et al.. Investigation of the surrogate-reaction method via the simultaneous measurement of gamma-emission and fission probabilities. International Conference on Nuclear Data for Science and Technology (ND2016), Sep 2016, Bruges, Belgium. pp.11006, ⟨10.1051/epjconf/201714611006⟩. ⟨in2p3-01630894⟩

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