Physics · Nuclear Physics

Absorbed dose is a measure of the amount of energy deposited in a material by ionizing radiation per unit mass. The unit of absorbed dose is the gray (Gy), which is defined as the absorption of one joule of radiation energy per kilogram of the material.

The sievert (Sv) is a unit of dose equivalent, which takes into account the biological effect of different types of ionizing radiation on human tissue. The roentgen (R) is a unit of exposure, which measures the ionization produced by X-rays or gamma rays in air. The curie (Ci) is a unit of activity, which measures the rate of radioactive decay of a substance.

The Sievert (Sv) is the unit of equivalent dose, which takes into account the biological effects of different types of radiation on the human body. It's not the unit of absorbed dose. 

Absorbed dose is a measure of the amount of energy deposited in a material by ionizing radiation per unit mass. The unit of absorbed dose is the gray (Gy), which is defined as the absorption of one joule of radiation energy per kilogram of the material.

The sievert (Sv) is a unit of dose equivalent, which takes into account the biological effect of different types of ionizing radiation on human tissue. The roentgen (R) is a unit of exposure, which measures the ionization produced by X-rays or gamma rays in air. The curie (Ci) is a unit of activity, which measures the rate of radioactive decay of a substance.

The Roentgen (R) is a unit of exposure to ionizing radiation, specifically for X-rays and gamma rays. It measures the amount of ionization produced in the air, not absorbed dose. 

The Curie (Ci) is a unit of radioactive decay, specifically the activity of a radioactive substance. It's not a unit of absorbed dose, which measures the energy deposited by radiation in a material.