bi a Fig. B.29.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter. 7 pa Pa a se we ~ - 4 at Sa
bi a Fig. B.29.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter. 7 pa Pa a se we ~ - 4 at Sa