| 摘要 |
PURPOSE:To obtain gamma-ray detector for measuring absorbed dose of gamma-ray in which spatial dose rate at same position can be measured through a single detector while switching between two types of energy characteristics corresponding, respectively, to Gy and Sv. CONSTITUTION:The gamma-ray detecting system comprises a gamma-ray detector 1 and energy filters 2, 8 covering the detector 1 and to a slide ring 3 relatively movable to the detector 1, the energy filter 8 is loaded. The slide ring 3 is coupled through a drive section 5 and a gear 4 with the detector 1 and moved to the right and left in response to the rotation of the drive section 5. Control circuit 6 for the drive section 5 moves and stops the energy filter 8 at positions corresponding to energy characteristics of Gy and Sv (i.e., the position of the slide ring 3).
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