40 NUMBER 106 30 a 20 + 4 0 C1 I | 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 SLOPE (a} ' NUMBER 80 60 }- 4 40 _ 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 SLOPE (b) _l NUMBER NY 3 I 40 10 0.5 + 06 0.7 0.8 0.9 1.0 1.7 SLOPE 1.2 1.39 1.4 1.5 1.6 1.7 (c) Fig. 6—The number of particles observed with various decay slopes.