Multiple choice

A radioactivity of a sample is 211326dpm. What reading can be expected from a 97% scintillator?

  1. 2178.66

  2. 204986.22

  3. 211326

  4. 12299173

  5. 4.5900

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

disintegration per minute (dpm) = count per minute (cpm)/efficency. Therefore, cpm = dpm*efficency = 211326*97/100.