Which instrument is used to determine a worker's radiation exposure during XRF operations?

Which instrument is used to determine a worker's radiation exposure during XRF operations?

• A. Geiger counter
• B. Spectrometer
• C. Dosimeter
• D. Calorimeter

Answer: (C)

Measuring a worker’s radiation exposure uses a dosimeter because it records the cumulative dose a person receives over time. In XRF operations, where ionizing radiation can come from the instrument and scattered rays, a dosimeter provides a time-based dose history that helps ensure doses stay within safety limits and regulatory requirements. A Geiger counter is great for detecting the presence and rate of radiation in real time, but it doesn’t track the total dose a person has accumulated. A spectrometer analyzes the energy of X-rays to identify elements, not to measure exposure. A calorimeter measures heat from radiation interactions, which isn’t used for monitoring radiation dose in workers. Thus, a dosimeter is the appropriate tool for determining a worker’s radiation exposure.

Measuring a worker’s radiation exposure uses a dosimeter because it records the cumulative dose a person receives over time. In XRF operations, where ionizing radiation can come from the instrument and scattered rays, a dosimeter provides a time-based dose history that helps ensure doses stay within safety limits and regulatory requirements.

A Geiger counter is great for detecting the presence and rate of radiation in real time, but it doesn’t track the total dose a person has accumulated. A spectrometer analyzes the energy of X-rays to identify elements, not to measure exposure. A calorimeter measures heat from radiation interactions, which isn’t used for monitoring radiation dose in workers. Thus, a dosimeter is the appropriate tool for determining a worker’s radiation exposure.