| 摘要 |
PURPOSE:To measure radioactive rays in a wide energy range at good sensitivity with solid scintillators. CONSTITUTION:Three scintillators 14, 16, 18 are arranged at a detection section, and detecting holes 14a, 16a, 18a are formed on the scintillator blocks 14, 16, 18. The scintillator block 14 is for low energy, and the scintillator blocks 16, 18 are for intermediate energy and high energy respectively. The hole diameter of the detecting hole 14a is the smallest, and the number of the detecting holes 14a is the largest. The hole diameter of the detecting hole 18a is the largest, and the number of the detecting holes 18a is the smallest. The energy sensitivity differs for individual scintillator blocks 14, 16, 18, and constant sensitivity can be maintained over a wide energy range as a whole.
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