- 24 - wiS5 100 F 0 , 90 f80 70 F Activity A - Belle soil - top inch August 20, 1958 B - Belle soil - 8-10" depth Heel4i ppl42 August 20, 1958 145 b 50 |- 4O 30 2r95Nnp95 Ru 103p,103 Rh Ryl06pH106 Y 498 py: | 76 + ~515 20 10 4 I Fig. 7. | | Gamma spectrum curves of Belle top soil and of soil taken at a depth of 8 - 10 inches. The w!85 peaks were arbitrarily equated to illustrate the greater relative amount of W185 at depth in relation to the other isotopes.