Which type of dosimeter is commonly used for monitoring radiation exposure monthly?

The Thermoluminescent Dosimeter (TLD) is the correct choice for monitoring radiation exposure on a monthly basis because of its specific design and function. TLDs work by absorbing energy from ionizing radiation and then releasing that energy in the form of light when heated. The amount of light emitted is proportional to the radiation dose received. This allows for accurate and precise measurement of radiation exposure over time, making them particularly suitable for regular monitoring.

TLDs are advantageous in that they can be reused after being read and processed, which aligns well with monthly monitoring requirements. They are also capable of measuring a wide range of radiation types and can provide detailed information about the cumulative dose over extended periods, which is valuable for both personnel safety and regulatory compliance.

Film badges, while also used for monitoring radiation, typically provide less precise readings and are less flexible in terms of reuse. Neutron dosimeters, on the other hand, are specialized for measuring neutron radiation but are not used as universally as TLDs for general radiation monitoring. Biosafety monitors are not relevant to radiation exposure assessment and focus instead on biological safety and contamination measures.