Lg, - 4 IT, ay a8 Fig. B.38.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter, *Elevated levels may be due to nearby ®°Co source which was subsequently removed,
Lg, - 4 IT, ay a8 Fig. B.38.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter, *Elevated levels may be due to nearby ®°Co source which was subsequently removed,