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

Abstract : 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.
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Submitted on : Friday, October 22, 2021 - 8:41:10 PM
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Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License

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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. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2019, 933, pp.63-70. ⟨10.1016/j.nima.2019.04.084⟩. ⟨hal-01999992⟩

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