What unit is commonly used to express dose rate?

What unit is commonly used to express dose rate?

• A. Sievert per hour (Sv/h)
• B. Becquerel per hour (Bq/h)
• C. Gray per hour (Gy/h)
• D. Celsius per hour (C/h)

Answer: (A)

Dose rate is about how quickly biologically relevant radiation dose accumulates. The unit Sievert per hour is used for this because the sievert accounts for the type of radiation and the sensitivity of tissues, giving a meaningful measure of potential biological harm per unit time. Becquerel per hour would only describe the rate of radioactive decays, not the biological effect. Gray per hour would describe energy deposited per mass (physical dose) but not how that energy translates to biological harm. Celsius per hour is a temperature change rate and has no relation to radiation exposure. So, the unit commonly used to express dose rate is Sievert per hour.

Dose rate is about how quickly biologically relevant radiation dose accumulates. The unit Sievert per hour is used for this because the sievert accounts for the type of radiation and the sensitivity of tissues, giving a meaningful measure of potential biological harm per unit time.

Becquerel per hour would only describe the rate of radioactive decays, not the biological effect. Gray per hour would describe energy deposited per mass (physical dose) but not how that energy translates to biological harm. Celsius per hour is a temperature change rate and has no relation to radiation exposure.

So, the unit commonly used to express dose rate is Sievert per hour.