However, it's important to note that roentgen is primarily used for exposure to X-rays and gamma rays. It measures the amount of ionization produced in air by these types of radiation.

For other types of radiation, such as beta particles or neutrons, different units are used.

Here are some other common units used for measuring radiation:

* Gray (Gy): The standard unit for measuring absorbed dose, which is the amount of energy absorbed by a material from radiation.

* Sievert (Sv): The standard unit for measuring equivalent dose, which takes into account the biological effects of different types of radiation.

* Becquerel (Bq): The unit for measuring activity, which is the rate at which a radioactive source decays.

Choosing the appropriate unit depends on the type of radiation and the context of the measurement.