X-ray detection capability of a BaCl single crystal scintillator

Koshimizu, Masanori*; Onodera, Kazuya*; Nishikido, Fumihiko*; Haruki, Rie; Shibuya, Kengo*; Kishimoto, Shunji*; Asai, Keisuke*

Journal of Applied Physics, 111(2), p.024906_1 - 024906_5, 2012/01

https://doi.org/10.1063/1.3677986

Application of accelerators for the research and development of scintillators

Shibuya, Kengo*; Koshimizu, Masanori*; Asai, Keisuke*; Muroya, Yusa*; Katsumura, Yosuke; Inadama, Naoko*; Yoshida, Eiji*; Nishikido, Fumihiko*; Yamaya, Taiga*; Murayama, Hideo*

Review of Scientific Instruments, 78(8), p.083303_1 - 083303_7, 2007/08

https://doi.org/10.1063/1.2777152

I-127 nuclear resonant quasi-elastic scattering from a potassium iodide aqueous solution

Haruki, Rie; Imai, Yasuhiko*; Koshimizu, Masanori*; Nishikido, Fumihiko*; Shibuya, Kengo*; Kurokuzu, Masayuki*; Yoda, Yoshitaka*; Kishimoto, Shunji*

no journal, , 

no abstracts in English

Measurement of Cu-63(n,p)Ni-63 production cross section, 1; Measurement of spatial distribution of thermal neutron irradiation dose in irradiation capsule using activation of gold

Nakasone, Shunya*; Yoshii, Taiki*; Shibuya, Kengo*; Yunoki, Akira*; Sakai, Hirotaka*; Shimada, Taro; Manabe, Seiya*; Matsumoto, Tetsuro*

no journal, , 

Cable has become subject to clearance since the revision of the clearance regulations. Ni-63, a nuclide that is difficult to measure, is produced by the activation of copper in cables. When calculating the amount of Ni-63 produced, the activation cross section in the thermal neutron region differs by a factor of about 6 between nuclear data libraries, so that accurate activation calculations have not been possible. Therefore, the purpose of this study is to improve the accuracy of the calculation of Cu activation and to estimate the reaction cross section of Cu-63(n,p)Ni-63 in the thermal neutron region with good accuracy based on actual measurements. In this presentation, the uncertainty of the thermal neutron fluence contributing to the Cu activation was evaluated using Au-198 after neutron irradiation at JRR-3 in JAEA. High-purity gold and copper samples were placed alternately, and the entire sample was packaged in aluminum foil and sealed in an irradiation capsule, which was placed at the bottom of JRR-3 HR-2 with the capsule lid facing upward. Three irradiation capsules were prepared and irradiated with neutrons for 10, 20, and 30 minutes, respectively. About 50 days after irradiation, the radioactivity was measured using a Ge semiconductor detector. The results showed that the radioactivity per unit mass of gold samples irradiated in each irradiation was the highest in the sample placed at the top of the capsule and decreased by 68% toward the bottom of the capsule. This trend is reasonable. The average value of the thermal neutron fluence rate for all samples was 7 10 cm s. These results confirm that the thermal neutron fluence can be determined with an accuracy on the order of percent.