[3K01-04] Dosimetry 1

[3K03] Advancement of airborne radiation measurement technology

(2) Simulations of unmanned helicopter and LaBr₃(Ce) detector used for estimating radiocesium distribution in soil

*Alex Malins¹, Kotaro Ochi², Takamasa Nakasone², Tsutomu Yamada², Masahiko Machida¹, Hiroshi Kurikami^1,2, Kimiaki Saito^1,2, Yukihisa Sanada² (1. Center for Computational Science & e-Systems, JAEA, 2. Fukushima Environmental Safety Centre, JAEA)

Keywords:LaBr3(Ce), gamma spectroscopy, unmanned helicopter, airborne survey, PHITS, peak-to-Compton method, simulation

Here we report PHITS Monte Carlo simulations of a LaBr₃(Ce) gamma spectroscopy system used in unmanned helicopter radiation surveys in Fukushima Prefecture. The simulated spectra were verified against measurements taken under controlled laboratory conditions. Simulations were used to characterize the peak-to-Compton method for estimating the vertical distribution of radiocesium in soil from airborne surveys.