GAMMA-RAY MEASUREMENT DEVICE, AND GAMMA-RAY MEASUREMENT METHOD

摘要

Provided are a gamma-ray measurement device and a gamma-ray measurement method with which gamma rays in a mixed field of neutrons and gamma rays can be measured using a simple and inexpensive structure. This gamma-ray measurement device (100) is used in a method in which the radiation dose when a lead filter (11) is used and the radiation dose when the lead filter (11) is not used are measured in the same place, and the gamma-ray dose is acquired from the difference therebetween. The gamma-ray measurement device (100) is configured from: a first detector (1) configured from the lead filter (11) which blocks gamma rays, and a glass dosimeter (3) disposed at the centre of the filter (11); and a second detector configured from a glass dosimeter (3) only. The gamma-ray dose can be measured in a mixed field of neutrons and gamma rays by subtracting, from the radiation dose measured by the glass dosimeter (3) of the second detector, the radiation dose measured by the glass dosimeter of the first detector (1).