Experimental set-up for the simultaneous measurement of fission and $\gamma$ -emission probabilities induced by transfer or inelastic-scattering reactions

R. Pérez Sánchez (1, 2) , B. Jurado (1) , P. Marini (1, 2) , M. Aiche (1) , S. Czajkowski (1) , D. Denis-Petit (1, 2) , Q. Ducasse (1) , L. Mathieu (1) , I. Tsekhanovich (1) , A. Henriques (1) , V. Méot (2) , O. Roig (2)

1 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
2 DAM - Direction des Applications Militaires

Fission and γ -emission probabilities induced by transfer or inelastic scattering reactions with light projectile nuclei are very valuable quantities for constraining the models that describe the de-excitation of heavy nuclei. We have developed an experimental set-up that allows us to simultaneously measure fission and γ -emission probabilities. The measurement of the γ -emission probability at excitation energies where the fission channel is open is challenging due to the intense background of γ rays emitted by the fission fragments. We discuss the procedure to subtract such a background and the constraints that this subtraction and other experimental conditions put on the set up. We show that our set-up complies with these constraints.

Mots clés: Fission probabilities; C6 D 6 scintillators; Si telescopes; Solar cells; γ -emission probabilities; Germanium detectors

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Physique Nucléaire Expérimentale [nucl-ex]

R. Pérez Sánchez, B. Jurado, P. Marini, M. Aiche, S. Czajkowski, et al.. Experimental set-up for the simultaneous measurement of fission and $\gamma$ -emission probabilities induced by transfer or inelastic-scattering reactions. Nucl.Instrum.Meth.A, 2019, 933, pp.63-70. ⟨10.1016/j.nima.2019.04.084⟩. ⟨hal-01999992⟩