Measurement of Neutron Capture Cross Section of²³⁷Np from 0.02 to 100 eV

Abstract

Abstract The neutron capture cross section of 237 Np has been measured relative to the 10B (n, α)7Li* cross section by the time-of-flight method in the energy range from 0.02 to 100 eV. The 46 MeV electron linear accelerator at the Research Reactor Institute, Kyoto University, was used as a pulsed neutron source. The BGO scintillation detector was employed in conjunction with the flash ADC-based data taking system for measurement and data accumulation. For the first time the capture cross section of 237 Np in resonance energy range was measured using the total energy gamma-ray detector. The results of present measurements have been compared with the evaluated capture cross sections of ENDF/B-VI and JENDL-3.3, as well as with the data measured by other authors. KEYWORDS: neptunium 237neutron capture cross sectionmeasurementtime-of-flight methodcapture gamma raysBGO detectorneutron resonances