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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 700 (2013) 59-64
The extrapolated-efficiencymethod, a new technique to determine the g-cascade detection efficiency in experiments based on the surrogate-reaction method
G. Boutoux1, B. Jurado1, L. Mathieu1, V. Méot2, M. Aïche1, G. Barreau1, A. Blanc2, I. Companis1, O. Roig2, C. Théroine2

The surrogate-reaction method is an indirect technique to extract neutron-induced cross-sections of short-lived nuclei. In the last years several experiments have been performed to investigate whether this technique can be applied to infer radiative-capture cross-sections. A major difficulty in this type of measurements is the determination of the gamma-cascade detection efficiency. The pulse-height weighting technique (PHWT) has been previously used to determine this quantity in surrogate experiments. In this work, we present a new method to determine the gamma-cascade detection efficiency in the vicinity of the neutron-separation energy that is much simpler than the PHWT. We also investigate the possibility to apply this new technique in standard experiments using neutron beams.
1 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
2 :  DAM/DIF - DAM Île-de-France
Physique/Physique Nucléaire Expérimentale