Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5499032 | Radiation Physics and Chemistry | 2017 | 4 Pages |
Abstract
The fission cross-sections of the 232Th(n,f)134Te and 232Th(n,f)134I reactions induced by neutrons around 14 MeV were measured by the neutron activation and off-line gamma ray technique. The neutron fluence was monitored on line using the accompanying α-particles from the T(d,n)α reaction, meanwhile, neutron energies were obtained from the cross-section ratio method of 90Zr(n,2 n)89(m+g)Zr to 93Nb(n,2 n)92 mNb reactions. The experimentally determined 232Th(n,f)134Te reaction cross-sections are 9.57±0.47 mb at En=14.1±0.3 MeV, 10.0±0.5 mb at En=14.5±0.3 MeV and 10.7±0.6 mb at En=14.7±0.3 MeV, respectively. Whereas, the isotope 134I of which characteristic γ-rays were detected in the γ-spectrum was concluded to be originated from 134Te decay. According to the cascade deduction formulism, the cross-section of 232Th(n,f)134I was estimated to be below a value (~5.7Ã10â3 mb) refered to the Minimal Detectable Activity (MDA) with the gamma measurements.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Zhang Zhengwei, Liu Shuangtong, Wang Qiang, Lan Changlin, Guan Xingcai, Lai Caifeng, Fang Kaihong,