RADIOACTIVITY MEASUREMENT CONTAINER

PROBLEM TO BE SOLVED: To obtain a radioactivity measurement container that enables improvement in reliability of a measurement result of a radioactivity measurement value.SOLUTION: A radioactivity measurement container 10 for having a measurement object specimen 1 filled and for measuring radioactivity has: a radioactivity detector insertion recessed part 11 for arranging a sensor section 51 so that a reference specimen center-of-gravity position 101 serving as a geometric center of gravity when a measurement object specimen 1 having homogeneity in density is filled up to a preliminary specified volume and the specimen is uniformly distributed, and a sensor section center-of-gravity position 100 of the sensor section 51 of a radioactivity detector 50 having sensitivity to radioactive rays coincide or a gap 80 between these center of gravity positions falls within a predetermined distance range.