Which is accurate as low as 100 μGya?

Which is accurate as low as 100 μGya?

• A. OSL
• B. Film badge
• C. TLD
• D. Handheld ionization chamber

Answer: (B)

The main idea here is about how sensitive different dosimeters are for detecting small radiation doses. A film badge is designed to record cumulative exposure and has a practical detection threshold around 0.1 mSv, which corresponds to about 100 μGy in gamma-type exposure (because for gamma, Gy and Sv are numerically the same). So it can reliably indicate doses at that level. A handheld ionization chamber is a real-time instrument used mainly for dose-rate checks and surveys, not for accumulating and reporting small, long-term doses a worker receives. OSL and TLD dosimeters are more sensitive and can measure even lower doses with higher precision, but the question focuses on the capability to read down to 100 μGy in typical personnel monitoring scenarios, where film badges are commonly used and adequate.

The main idea here is about how sensitive different dosimeters are for detecting small radiation doses. A film badge is designed to record cumulative exposure and has a practical detection threshold around 0.1 mSv, which corresponds to about 100 μGy in gamma-type exposure (because for gamma, Gy and Sv are numerically the same). So it can reliably indicate doses at that level.

A handheld ionization chamber is a real-time instrument used mainly for dose-rate checks and surveys, not for accumulating and reporting small, long-term doses a worker receives. OSL and TLD dosimeters are more sensitive and can measure even lower doses with higher precision, but the question focuses on the capability to read down to 100 μGy in typical personnel monitoring scenarios, where film badges are commonly used and adequate.