+ & was ae ~ By pong cs Fig. B.33.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter.
+ & was ae ~ By pong cs Fig. B.33.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter.