Integral experiment on molybdenum with DT neutrons at JAEA/FNS

摘要

An integral experiment on molybdenum is performed with a DT neutron source at JAEA/FNS. A Mo assembly is covered with lithium oxide blocks in order to reduce background neutrons inside the assembly. Several reaction rates and fission rates are measured along the central axis inside the assembly and compared with calculated ones with the Monte Carlo transport code MCNP5-1.40 and recent nuclear data libraries of ENDF/B-VII.1, JENDL-4.0, and JEFF-3.2. The calculated results generally show underestimation. From our detailed analysis, it is concluded that the (n,2n) cross section data of all the Mo stable isotopes in JEFF-3.2 are more suitable than those in JENDL-4.0 and the (n, gamma) cross section data of (MO)-M-92, Mo-94, Mo-95, Mo-96, Mo-97, and Mo-100 in JENDL-4.0 are overestimated. (C) 2015 Elsevier B.V. All rights reserved.