A Geiger-Mueller detector with a Apancake@ probe (often called a frisker) is being used to monitor personnel leaving a radiologically controlled area.
The probe is equipped with a mica window.
Two individuals have radioactive skin contamination—one individual with only alpha emitters, and the other with only beta emitters. Both types of radiation are being emitted at the same rate.
The same percentage of each type of radiation enters the probe’s detection chamber and causes ionization.
Which one of the following describes the detectors count rate response to the alpha and beta radiation?
A. The count rate will be higher for the alpha radiation.
B. The count rate will be higher for the beta radiation.
C. The count rate will be the same for both types of radiation.
D. Cannot be determined without knowing the energy levels of the radiation.
Show Answer
Answer: C
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