近畿大学UTR-KINKI反应堆对小鼠进行辐照期间中子场的畸变。

Distortion of neutron field during mice irradiation at Kinki University reactor UTR-KINKI.

作者信息

Endo Satoru, Tanaka Kenichi, Fujikawa Kazuo, Horiguchi Tetsuo, Itoh Tetsuo, Bengua Gerard, Nomura Taisei, Hoshi Masaharu

机构信息

Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.

出版信息

Appl Radiat Isot. 2007 Sep;65(9):1037-40. doi: 10.1016/j.apradiso.2007.04.018. Epub 2007 May 22.

DOI:10.1016/j.apradiso.2007.04.018

PMID:17566749

Abstract

A dosimetry study of mice irradiation at the Kinki University nuclear reactor (UTR-KINKI) has been carried out. Neutron and gamma-ray doses at the irradiation port in the presence of 0, 1, 2, 4 and 6 mice were measured using the paired chamber method. The results show that neutron dose is reduced with increasing numbers of mice. In the six-mice irradiation condition, neutron dose is about 15% smaller compared to a case where no mice were placed in the irradiation port. To investigate the distortion of the neutron spectrum during mice irradiation at UTR-KINKI, a Monte Carlo calculation using the MCNP4C code has been carried out. The measured variation in dose with respect to the total mouse mass was closely reproduced by the calculation results for neutron and gamma-ray dose. Distortion of the neutron spectrum was observed to occur between 1 keV and 1 MeV.

摘要

已在近畿大学核反应堆（UTR-KINKI）对小鼠辐照进行了剂量测定研究。使用配对室法测量了在辐照端口存在0、1、2、4和6只小鼠时的中子和γ射线剂量。结果表明，中子剂量随着小鼠数量的增加而降低。在六只小鼠的辐照条件下，与辐照端口未放置小鼠的情况相比，中子剂量约小15%。为了研究在UTR-KINKI对小鼠进行辐照期间中子谱的畸变，已使用MCNP4C代码进行了蒙特卡罗计算。计算结果紧密再现了测得的剂量相对于小鼠总质量的变化。观察到在1keV至1MeV之间发生了中子谱的畸变。