The gray (Gy) is not a unit of dose rate; rather, it is the unit of absorbed dose, measuring the amount of energy deposited by ionizing radiation per unit mass of irradiated material. The dose rate, which represents the amount of radiation delivered per unit of time, is measured in gray per unit of time.
The correct unit for dose rate in the International System of Units (SI) is the gray per second (Gy/s) or its subunits, such as gray per minute (Gy/min) or gray per hour (Gy/h), depending on the context.
To clarify, if you are measuring the rate at which absorbed dose is delivered, you would use units like Gy/s or Gy/min, not just the gray (Gy) alone, which specifically quantifies the total absorbed dose.
