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

B. Jurado; P. Marini; L. Mathieu; M. Aiche; S. Czajkowski; I. Tsekhanovich; L. Audouin; G. Boutoux; D. Denis-Petit; M. Guttormsen; G. Kessedjian; M. Lebois; V. Méot; A. Oberstedt; S. Oberstedt; O. Roig; O. Sérot; L. Tassan-Got; J.N. Wilson

doi:10.1051/epjconf/201714611006

All issues

Volume 146 (2017)

EPJ Web Conf., 146 (2017) 11006

Abstract

Open Access

Issue		EPJ Web Conf. Volume 146, 2017 ND 2016: International Conference on Nuclear Data for Science and Technology


Article Number		11006
Number of page(s)		6
Section		Nuclear Reaction Measurements
DOI		https://doi.org/10.1051/epjconf/201714611006
Published online		13 September 2017

EPJ Web of Conferences 146, 11006 (2017)
https://doi.org/10.1051/epjconf/201714611006

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

B. Jurado¹^a, P. Marini¹, L. Mathieu¹, M. Aiche¹, S. Czajkowski¹, I. Tsekhanovich¹, L. Audouin², G. Boutoux³, D. Denis-Petit⁴, M. Guttormsen⁵, G. Kessedjian⁶, M. Lebois², V. Méot⁴, A. Oberstedt⁷, S. Oberstedt⁸, O. Roig⁴, O. Sérot⁹, L. Tassan-Got² and J.N. Wilson²

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: jurado@cenbg.in2p3.fr

Published online: 13 September 2017

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.

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.

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