A radiation detection instrument measuring the equivalent dose rate will display units of?

A radiation detection instrument measuring the equivalent dose rate will display units of?

• A. Coulombs Per Kilogram (C/kg)
• B. Gray (Gy)
• C. Sieverts Per Hour (Sv/hr)
• D. Seconds

Answer: (C)

Measuring equivalent dose rate reflects how fast biologically significant radiation energy is being delivered, accounting for the type of radiation. The unit used for dose that represents biological effect is the sievert, and since we’re looking at a rate, we include per hour. So the instrument will display Sieverts per hour (Sv/h). Coulombs per kilogram would be an exposure/air kerma measure in air, not a direct biological effect and not a rate. Gray is an absorbed dose (energy deposited per mass) and doesn’t include radiation type or rate. Seconds are a unit of time, not dose. Some detectors may show mSv/h, but the concept and unit remain sieverts per hour.

Measuring equivalent dose rate reflects how fast biologically significant radiation energy is being delivered, accounting for the type of radiation. The unit used for dose that represents biological effect is the sievert, and since we’re looking at a rate, we include per hour. So the instrument will display Sieverts per hour (Sv/h).

Coulombs per kilogram would be an exposure/air kerma measure in air, not a direct biological effect and not a rate. Gray is an absorbed dose (energy deposited per mass) and doesn’t include radiation type or rate. Seconds are a unit of time, not dose. Some detectors may show mSv/h, but the concept and unit remain sieverts per hour.