Neutron-induced cross sections of actinides via the surrogate-reaction method

Q. Ducasse; B. Jurado; M. Aiche; T. Tornyi; A. Görgen; J.N. Wilson; G. Barreau; I. Companis; S. Czajkowski; F. Giacoppo; F. Gunsing; M. Guttormsen; A.C. Larsen; M. Lebois; J. Matarranz; T. Renstrøm; S. Rose; S. Siem; I. Tsekhanovich; G.M. Tveten; T.W. Hagen; M. Wiedeking; O. Serot; G. Boutoux; P. Chau Huu-Tai; V. Méot; O. Roig

doi:10.1051/epjconf/20136208002

Proceedings

Open Access

EPJ Web of Conferences 62, 08002 (2013)
https://doi.org/10.1051/epjconf/20136208002

Neutron-induced cross sections of actinides via the surrogate-reaction method

Q. Ducasse¹^,2^a, B. Jurado¹^b, M. Aiche¹, T. Tornyi³, A. Görgen³, J.N. Wilson⁴, G. Barreau¹, I. Companis, S. Czajkowski¹, F. Giacoppo³, F. Gunsing⁵, M. Guttormsen³, A.C. Larsen³, M. Lebois⁴, J. Matarranz, T. Renstrøm³, S. Rose³, S. Siem³, I. Tsekhanovich¹, G.M. Tveten³, T.W. Hagen³, M. Wiedeking, O. Serot², G. Boutoux⁷, P. Chau Huu-Tai⁷, V. Méot⁷ and O. Roig⁷

¹ CENBG, Chemin du Solarium, BP. 120, 33175 Gradignan, France
² CEA-Cadarache, DEN/DER/SPRC/LEPh, 13108 Saint Paul lez Durance, France
³ University of Oslo, Department of Physics, PO Box 1048, Blindem 0316 Oslo, Norway
⁴ IPN Orsay, 15 rue G. Clémenceau, 91191 Gif-sur-Yvette Cedex, France
⁵ CEA Saclay, DSM/Irfu, 91191 Gif-sur-Yvette Cedex, France
⁶ iThemba LABS, PO Box 722, 7129 Somerset West, South Africa
⁷ CEA, DAM, DIF, 91297 Arpajon, France

^a e-mail: ducasse@cenbg.in2p3.fr
^b e-mail: jurado@cenbg.in2p3.fr

Published online: 13 December 2013

Abstract

The surrogate-reaction method is an indirect way of determining cross sections for reactions that proceed through a compound nucleus. This technique may enable neutron-induced cross sections to be extracted for short-lived nuclei that otherwise cannot be measured. However, the validity of the surrogate method has to be investigated. In particular, the absence of a compound nucleus formation and the J^π dependence of the decay probabilities may question the method. In this work we study the reactions ²³⁸U(d,p)²³⁹U, ²³⁸U(³He,t)²³⁸Np, ²³⁸U(³He,⁴He)²³⁷U as surrogates for neutron-induced reactions on ²³⁸U, ²³⁷Np and ²³⁶U, respectively, for which good quality data exist. The experimental set-up enabled the measurement of fission and gamma-decay probabilities. The first results are hereby presented.

© Owned by the authors, published by EDP Sciences, 2013

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