Radiation Exposure Dose Rate

The exposure dose rate is the ratio of the increment in the exposure dose of photon radiation over a time interval to the time of this interval. It is an important parameter characterizing the intensity of radiation and the degree of its impact on the human or animal body.

Exposure dose of photon (γ) radiation is a measure of the energy absorbed by ionizing radiation in a specific volume of matter. It is measured in SI units - rem (biological equivalent of x-rays).

The exposure dose rate (P) is defined as the ratio of the dose increment over a certain time interval (ΔD) to the duration of this interval (t):
P = ΔD/t.

The unit of measurement of exposure dose rate is rem/s.

The ratio of the exposure dose rate to the dose is called the dose rate.

Depending on the radiation source, the exposure dose rate can vary over a wide range of values. For example, for X-ray radiation it is about 100-1000 rem/h, and for radioactive sources - 1-10 mSv/h. In this case, the exposure dose rate depends on the distance to the radiation source and can be significantly higher near it.

Measuring the exposure dose rate plays an important role in radiation safety, as it allows one to assess the degree of exposure to ionizing radiation on the body and take the necessary measures to protect it.

Exposure dose rate (X-ray exposure rate) of radiation is a parametric radiation that estimates the intensity of radiation intake and allows one to determine the effectiveness of dosimetric systems and personal protective equipment. The operation of radiation dosimeters is based on the cumulative dose of radiation, which is measured in roentgens.

Exposure dose rate measures the intensity of radiation entering the beam chamber, which is placed inside a certain object or distance between people. Background radiation measurements are carried out both indoors and outdoors; can also be used to monitor the radiation situation in workplaces, construction, etc.

To understand how exposure power is measured, it is important to know that radiation exposure dose, as measured from exposure to X-rays, is determined by the amount of energy that is absorbed by the object. The measurement uses a radiometric source of gamma rays with an energy similar to X-rays. The range of radiation is determined by changes in radiation energy