Which conventional unit is used for Absorbed Dose?

Which conventional unit is used for Absorbed Dose?

• A. Gray (Gy)
• B. Sievert (Sv)
• C. Roentgen (R)
• D. rad

Answer: (D)

Absorbed dose is about how much energy radiation deposits per unit mass in a material. Historically, this energy deposition was expressed in a conventional unit called the rad, where one rad is 0.01 gray. That makes rad the traditional way to quantify absorbed dose. The gray is the modern SI unit for the same quantity (1 gray = 1 joule per kilogram). The Sievert represents biological effect and uses weighting factors, so it isn’t a direct measure of energy deposited. Roentgen measures exposure in air, not the actual energy deposited in matter. So the conventional unit used for absorbed dose is the rad.

Absorbed dose is about how much energy radiation deposits per unit mass in a material. Historically, this energy deposition was expressed in a conventional unit called the rad, where one rad is 0.01 gray. That makes rad the traditional way to quantify absorbed dose. The gray is the modern SI unit for the same quantity (1 gray = 1 joule per kilogram). The Sievert represents biological effect and uses weighting factors, so it isn’t a direct measure of energy deposited. Roentgen measures exposure in air, not the actual energy deposited in matter. So the conventional unit used for absorbed dose is the rad.