Gamma-ray sensitivity and shielding of a neutron imaging plate
Gamma-ray sensitivity and shielding of a neutron imaging plate
复制标题
中子成像板的伽马射线灵敏度和屏蔽
DOI：
10.1107/s0021889899005701
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发表时间：
1999
影响因子：
6.1
通讯作者：
N. Niimura
中科院分区：
文献类型：
--
作者：
Y. Haga;S. Kumazawa;N. Niimura
中子成像板 (NIP) 的伽马射线灵敏度的能量依赖性已被测量。伽马射线能量小于300keV时，伽马射线灵敏度相当于热中子的一半，大于300keV时，相当于热中子的1/40。在日本原子能研究所 (JAERI) 反应堆 JRR-3M 的实验大厅中，测量了铅对 NIP 的伽马射线屏蔽效果。结果发现，厚度为 40 mm 的铅足以将伽马射线背景降低至归一化比例的 1/10。用厚度为 1 mm 的铅箔覆盖 NIP 可以减少伽马射线背景，但不会减少中子信号。
The energy dependence of gamma-ray sensitivity of a neutron imaging plate (NIP) has been measured. The gamma-ray sensitivity is equivalent to one half that of a thermal neutron at a gamma-ray energy less than 300 keV, and 1/40 at greater than 300 keV. The shielding of the NIP, by lead, from gamma rays in the experimental hall of the reactor JRR-3M of the Japan Atomic Energy Research Institute (JAERI) was measured. It was found that lead of thickness 40 mm is sufficient to reduce the gamma-ray background to 1/10 on a normalized scale. Covering the NIP with lead foil of thickness 1 mm results in a decrease of the gamma-ray background without reduction of the neutron signal.