Page 64 - Radiation Safety
P. 64
GRAPH
Effect of distance on intensity
Distance 50 75 100 125 150 175 200
(cm)
CPM 108000 72300 46700 33000 23900 18000 14400
140000
120000
100000
80000
CPM 60000
40000
20000
0
50 70 90 110 130 150 170 190 210
Distance, cm
