& tae Ke & Fig. B.41.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter. 4 ¥ 2 ‘e aN & .
& tae Ke & Fig. B.41.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter. 4 ¥ 2 ‘e aN & .