THE PHOTON SENSITIVITY OF A MODERATED ACTIVATION NEUTRON DETECTOR
THE PHOTON SENSITIVITY OF A MODERATED ACTIVATION NEUTRON DETECTOR
复制标题
DOI：
10.1118/1.595832
复制
发表时间：
1986-09-01
期刊：
影响因子：
3.8
通讯作者：
MCGINLEY, PH
中科院分区：
文献类型：
--
作者：
MCGINLEY, PH
本文描述了一种估算中子剂量测量系统中碳氢慢化剂中光子反应产生的中子产生的超响应的方法。结果表明，慢化剂中的光子相互作用产生每单位吸收剂量1.40 × 104的表观中子注量。对于平坦的33-MV X射线束为106 n/cm 2/Gy-x，对于平坦的33-MV X射线束为2.66 × 106 n/cm 2/Gy-x。106 n/cm 2/Gy-x，对于相同的光束，没有平坦滤波器。慢化活化中子探测器的光子响应被发现在33至18.7 MeV的范围内的X射线束的端点能量迅速降低。
A method is described for estimating the overresponse produced by neutrons generated in the hydrocarbon moderator of a neutron dosimetry system by photon reactions. It is shown that photon interactions in the moderator produce an apparent neutron fluence per unit absorbed dose of 1.40 .times. 106 n/cm2/Gy-x for a flattened 33-MV x-ray beam and 2.66 .times. 106 n/cm2/Gy-x for the same beam without the flattening filter in place. The photon response of the moderated activation neutron detector was found to decrease rapidly with end point energy of the X-ray beam in the range 33 to 18.7 MeV.