STANDARD SAMPLE FOR RADIOACTIVITY MEASUREMENT AND PRODUCTION METHOD OF STANDARD SAMPLE FOR RADIOACTIVITY MEASUREMENT

摘要

PROBLEM TO BE SOLVED: To provide a standard sample which can be used for radioactivity measurement of a raw wood used for cultivation of fungi, and excellent in reliability and stability.SOLUTION: A standard sample 10 is a standard sample used for radioactivity measurement of a raw wood used for cultivation of fungi. The standard sample 10 comprises a columnar core material 20 containing wood, and a coating member 40 for coating the core material 20. The core material 20 has on a side face part thereof, a radioactive material-containing region 220.SELECTED DRAWING: Figure 2