[2E10-15] Radioactivity Measurement and Environmental Restoration

[2E15] Development of a portable contamination detector

*Hiroshi Iwase¹, Yoshihito Namito¹, Hideo Hirayama¹ (1. High Energy Accelerator Research Organization)

Keywords:Soil contamination, Radiation detector, Fukushima

A portable soil contamination detector is under development. A subtraction of radiation counts, measured by a pancake-type Geiger-Mueller detector with and without an acrylic cap put on the contaminated ground, can be considered as the contribution of beta-rays from the contamination. It is confirmed in this study that the beta-ray count rates (cps) and the contaminations (Bq/kg) for different contamination levels are proportional.