Question: 1. Determine the source CPM at 25 cm 2. Determine the source CPM at 50 cm 3. Ratio : 30 cm / 60 cm Counts

1. Determine the source CPM at 25 cm

2. Determine the source CPM at 50 cm

3. Ratio : 30 cm / 60 cm

Counts per minute (cpm) Background cpm Source cpm 15.7 251.3 10 cm

Counts per minute (cpm) Background cpm Source cpm 15.7 251.3 10 cm 267 15.7 168.3 30 cm 184 15.7 41.3 60 cm 57 15.7 15.3 90 cm 31 15.7 12.3 120 cm 28 (1pts) Determine the source cpm at 25 cm X x- fel 9 B E ITI E IT Normal BIIIU (1pts) Determine the source cpm at 50 cm : BIU X X E E = E ITI E IT Normal

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