Analysis of Sample Worth for Dy2O3, Ho2O3, Er2O3 and Tm2O3 Measured at KUCA by MVP with Recent Version of ENDF and JENDL

Analyses were performed to validate nuclear data of some rare-earth elements by using the continuous energy Monte-Carlo code: MVP with recent version of ENDF and JENDL. The target of the analyses was the sample worth of Dy2O3, Ho2O3, Er2O3 and Tm2O3 measured at Kyoto University Critical Assembly (KUCA), and the worth was measured at two different cores named E3 (softer neutron spectrum) and EE1 (harder neutron spectrum) to evaluate the dependency of C/E values on neutron spectrum. The cross section library such as JENDL-3.3 does not cover all of four elements, therefore the sample worth of Dy2O3 was analyzed with ENDF/B-VI.8, ENDF/B-VII.0 and JENDL-4.0, and that of Ho2O3 was analyzed with ENDF/B-VI.8 and ENDF/B-VII.0, and that of Er2O3 was analyzed with ENDF/B-VI.8, ENDF/B-VII.0, JENDL-3.3 and JENDL-4.0, and that of Tm2O3 was analyzed with JENDL-4.0. The C/E values were within the range from 0.98 to 1.10 with relative standard deviation about 0.03. The large discrepancy of C/E value from 1.0 was not observed for all the results and this fact indicated the validity of cross section libraries of Dy, Er, Ho and Tm in ENDF/B-VI.8, ENDF/B-VII.0, JENDL-3.3 and JENDL-4.0. There was a small discrepancy observed in the case of Dy2O3 between E3 and EE1 cores and overestimation of Ho2O3 worth at both cores was observed. The analysis of JENDL-4.0 for Tm was also in good agreement with the measurements and the C/E values are around 1.0 for both E3 and EE1 cores.