BETA PROPORTIONAL COUNTER 1.6. 1.5 fssa 1.4 1.3 1.2 1.4 1.0 O i 10 | 20 _| 30 I 40 mg/cm® PbMo0.4 | ELECTROSCOPE 14ae 1.3 fssa 1.2 Ll me “oO l 10 | 20 | 30. mg/cm? PbMo0O., Fig. 16. f= -") MOLn4998 Sample correction factors for Mo’’ 99 as PbMoO, mounted on very thick aluminum backing. oD an ¢ | 40 -52-