SÁNCHEZ, R. Pérez; JURADO, B.; MÉOT, V.; ROIG, O.; DUPUIS, M.; BOULAND, O.; DENIS-PETIT, D.; MARINI, P.; MATHIEU, L.; TSEKHANOVICH, I.; AÏCHE, M.; AUDOUIN, L.; CANNES, C.; CZAJKOWSKI, S.; DELPECH, S.; GÖRGEN, A.; GUTTORMSEN, M.; HENRIQUES, A.; KESSEDJIAN, G.; NISHIO, K.; RAMOS, D.; SIEM, S.; ZEISER, F.

doi:10.1103/PhysRevLett.125.122502

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SÁNCHEZ, R. Pérez
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
Direction des Applications Militaires [DAM]

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

MÉOT, V.
Direction des Applications Militaires [DAM]

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Physical Review Letters. 2020, vol. 125, n° 12, p. 122502

American Physical Society

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Reliable neutron-induced-reaction cross sections of unstable nuclei are essential for nuclear astrophysics and applications but their direct measurement is often impossible. The surrogate-reaction method is one of the most promising alternatives to access these cross sections. In this work, we successfully applied the surrogate-reaction method to infer for the first time both the neutron-induced fission and radiative capture cross sections of Pu239 in a consistent manner from a single measurement. This was achieved by combining simultaneously measured fission and γ-emission probabilities for the Pu240(He4,He′4) surrogate reaction with a calculation of the angular-momentum and parity distributions populated in this reaction. While other experiments measure the probabilities for some selected γ-ray transitions, we measure the γ-emission probability. This enlarges the applicability of the surrogate-reaction method.< Réduire

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Nuclear Physics

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Simultaneous Determination of Neutron-Induced Fission and Radiative Capture Cross Sections from Decay Probabilities Obtained with a Surrogate Reaction

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