RADIOACTIVITY MEASURING METHOD, PROGRAM FOR MEASURING RADIOACTIVITY, AND RADIOACTIVITY MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To determine a radioactivity conversion factor based on reduced information of a radioactivity measuring object to evaluate radioactivity of the radioactivity measuring object with excellent working efficiency.;SOLUTION: Shape information and material information of the radioactivity measuring object are input into a radioactivity conversion factor calculating part provided in this radioactivity measuring instrument (step S101). Then, the radioactivity measuring object is mounted on a tray provided in the radioactivity measuring instrument, and is conveyed up to a just under side of a radiation detecting means, to measure a mass W, a height H₀, and a count or counting rate of the radioactivity measuring object (step S102). The radioactivity conversion factor calculating part finds a radioactivity conversion factor K (CPS/Bq), based on the mass Wand the height H₀ of the radioactivity measuring object, after measuring the mass W, the height H₀, and the count or counting rate of the radioactivity measuring object (step S103), and converts the the count or counting rate of the radioactivity measuring object into a radioactive concentration (step S104).;COPYRIGHT: (C)2005,JPO&NCIPI