wt Weae BE ° . < “ Re Rete eB aye Fig. B.49.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter.
wt Weae BE ° . < “ Re Rete eB aye Fig. B.49.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter.