A gas-filled radiation detector operating in the ion chamber region is exposed to a constant gamma radiation field.
If the applied voltage is decreased but maintained within the ion chamber region, the rate of ion collection will…
A. stay approximately the same, because all of the primary ions continue to be collected and essentially no secondary ionizations are occurring.
B. stay approximately the same, because detector operation in the ionization chamber region is characterized by complete ionization of the detector gas.
C. decrease, because fewer primary ionizations are occurring in the detector as detector voltage decreases.
D. decrease, because fewer secondary ionizations are occurring in the detector as detector voltage decreases.
Show Answer
Answer: A
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