[1O09-13] Neutron Induced Reaction Experiment

[1O11] High-Energy Measurement of the Neutron Capture Cross-Section of ²³⁷Np

*Gerard Rovira Leveroni¹, Tatsuya Katabuchi¹, Ken-ichi Tosaka¹, Shota Matsuura¹, Osamu Iwamoto², Atsushi Kimura², Shoji Nakamura², Nobuyuki Iwamoto², Kazushi Terada¹ (1. Tokyo Tech, 2. JAEA)

Keywords:J-PARC, ANNRI, Neutron capture cross section, Minor Actinides, Time-of-flight measurement, CCONE, Nuclear data evaluation

The neutron capture cross section of Np-237 was measured at the ANNRI beamline of J-PARC. A final value for the capture cross section of ²³⁷Np 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 ¹⁹⁷Au 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.