DUCASSE, Q.; JURADO, B.; MATHIEU, L.; MARINI, P.; MORILLON, B.; AICHE, M.; TSEKHANOVICH, I.

doi:10.1016/j.nima.2016.04.083

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DUCASSE, Q.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
CEA Cadarache

JURADO, B.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

MATHIEU, L.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Nucl.Instrum.Meth.A. 2016, vol. 826, p. 60-64

Résumé en anglais

The study of transfer-induced gamma-decay probabilities is very useful for understanding the surrogate-reaction method and, more generally, for constraining statistical-model calculations. One of the main difficulties in the measurement of gamma-decay probabilities is the determination of the gamma-cascade detection efficiency. In Boutoux et al. (2013) [10] we developed the EXtrapolated Efficiency Method (EXEM), a new method to measure this quantity. In this work, we have applied, for the first time, the EXEM to infer the gamma-cascade detection efficiency in the actinide region. In particular, we have considered the 238 U(d,p) 239 U and 238 U( 3 He,d) 239 Np reactions. We have performed Hauser–Feshbach calculations to interpret our results and to verify the hypothesis on which the EXEM is based. The determination of fission and gamma-decay probabilities of 239 Np below the neutron separation energy allowed us to validate the EXEM.< Réduire

Mots clés en anglais

Surrogate-reaction method

Transfer-induced decay probabilities

Gamma-cascade detection efficiency

Extrapolated-Efficiency Method

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Application of the EXtrapolated Efficiency Method (EXEM) to infer the gamma-cascade detection efficiency in the actinide region

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