What is the most commonly used survey instrument in isotope radiography?

The Geiger-Mueller (GM) counter is the most commonly used survey instrument in isotope radiography due to its sensitivity and versatility in detecting a wide range of radiation types, including alpha, beta, and gamma radiation. The GM counter operates by using a gas-filled tube where radiation interacts with the gas, ionizing it and producing an electrical pulse. This pulse can then be counted, giving a straightforward indication of radiation levels.

In the context of isotope radiography, where the measurement of exposure to radiation is critical for both safety and assessment of the radiographic process, the GM counter provides real-time monitoring and is user-friendly, making it accessible for technicians in the field. It can detect low levels of radiation and is portable, allowing for convenience in various settings where isotopes are used.

Other instruments, such as the ionization chamber and scintillation counter, also have specialized applications in radiation measurement but are not as commonly used in the specific context of isotope radiography. Ionization chambers are typically used for precise dosimetry and high radiation fields, while scintillation counters are effective for detecting specific types of radiation and measuring low radiation levels but might not be as straightforward for routine surveys. Radiation dosimeters are primarily used for personal monitoring of radiation exposure rather