Which instruments are based on the ionization principle to measure radiation?

The choice of RADIAC (Radiation Detection Instrumentation) being based on the ionization principle for measuring radiation is correct because RADIAC instruments generally employ ionization chambers. These devices work by measuring the electric current that is produced when radiation ionizes the gas within the chamber. When ionizing radiation passes through the gas, it creates ions that can be collected and measured, providing a quantitative reading of the radiation level.

RADIAC instruments play a vital role in radiation safety by offering accurate readings in a range of environments, making them essential for monitoring exposure and ensuring safe radiation practices. Other types of radiation measurement devices, such as Geiger counters, scintillation detectors, and dosimeters, utilize different detection mechanisms, such as gas amplification or light emission, rather than relying solely on the ionization principle.