Measurement and analysis of thorium fission rate in a polyethylene shell with a D-T neutron source

作者：Zheng, Lei; Yang, Yiwei^*; Liu, Zhujun; Liu, Rong^*; Jiang, Li; Wang, Mei

来源：Fusion Engineering and Design, 2016, 113: 177-182.

DOI：10.1016/j.fusengdes.2016.09.013

• Th-232 fission rate
• Activation method
• D-T neutron source
• Integral experiment
• Polyethylene shell

In order to validate the Th-232 fission cross section, an integral experiment was carried out using the activation method in a polyethylene shell with a D-T neutron source. Thorium samples were arranged in the 0 direction to the incident D+ beam. The Th-232 fission rate was determined by measuring the 151.195 keV characteristic-gamma ray emitted from the fission fragment Kr-85m, and the experimental uncertainties were about 5.3%. MCNP calculation results employing ENDF/B-VII.O, JENDL-3.3, JENDL-4.0 libraries are in good agreement with that of experiments within uncertainties except that employing ENDF/B-VII.1 (similar to 6.5%). The experiment results can be used to re-evaluate the Th-232 fission cross section.

• 出版日期2016-12
• 单位中国工程物理研究院核物理与化学研究所; 中国工程物理研究院; 四川大学