| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation detection instrument enabling to reduce noises. SOLUTION: A shield plate 11 is formed by a conductive material having a low shield factor against radiation such as conductive carbons and alminum plates, and the shield plate 11 is placed between a phototimer 12 which measures radiation dose (in this case, X-ray) and a radiation sensitive semiconductor thick film 1 over the whole area of a X-ray detection effective area A. The shield plate 11 is grounded. Due to the configuration, radiation noises from the phototimer 12 is shielded by the shield plate 11 and dissipated to the ground. Therefore, radiation noises affecting to the radiation detection instrument caused by the phototimer 12 can be decreased. COPYRIGHT: (C)2005,JPO&NCIPI
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