High-energy measurement of the neutron capture cross-section of Np

Rovira, G.*; Katabuchi, Tatsuya*; Tosaka, Kenichi*; Matsuura, Shota*; Iwamoto, Osamu  ; Kimura, Atsushi   ; Nakamura, Shoji  ; Iwamoto, Nobuyuki  ; Terada, Kazushi*

The neutron capture cross section of Np was measured at the ANNRI beamline of J-PARC. A final value for the capture cross section of Np is presented using two normalization techniques. The capture data was normalized at the first resonance using JENDL-4.0 and also using the total neutron flux obtained from a Au sample measurement in which the first resonance was completely saturated. This measurement results were complemented with calculations using CCONE code to estimate the PH spectrum under the detection threshold. Alongside these results, an analysis of the high-energy capture cross-section with CCONE was performed. An evaluated cross-section is presented using the experimental results.