Characterization of gamma rays existing in the NMIJ standard neutron field

被引：5

作者：

Harano, H ^{[1
]}

Matsumoto, T ^{[1
]}

Ito, Y ^{[1
]}

Uritani, A ^{[1
]}

Kudo, K ^{[1
]}

机构：

[1] Natl Metrol Inst Japan, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

来源：

RADIATION PROTECTION DOSIMETRY | 2004年 / 110卷 / 1-4期

关键词：

D O I：

10.1093/rpd/nch208

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Our laboratory provides national standards on fast neutron fluence. Neutron fields are always accompanied by gamma rays produced in neutron sources and surroundings. We have characterised these gamma rays in the 5.0 MeV standard neutron field. Gamma ray measurement was performed using an NE213 liquid scintillator. Pulse shape discrimination was incorporated to separate the events induced by gamma rays from those by neutrons. The measured gamma ray spectra were unfolded with the HEPRO program package to obtain the spectral fluences using the response matrix prepared with the EGS4 code. Corrections were made for the gamma rays produced by neutrons in the detector assembly using the MCNP4C code. The effective dose equivalents were estimated to be of the order of 25 muSv at the neutron fluence of 10(7) neutrons cm(-2).

引用

页码：69 / 72

页数：4

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