Which device is used to survey an area for radiation detection and measurement?

Which device is used to survey an area for radiation detection and measurement?

• A. Handheld ionization chamber
• B. Geiger-Mueller detector
• C. TLD
• D. Film badge

Answer: (B)

When surveying an area for radiation, you want real-time feedback as you move to quickly locate where radiation is present. A Geiger-Mueller detector fits this role because it responds to ionizing events and gives immediate readings, often as a count rate per minute, with audible clicks as you sweep the space. This lets you map out hotspots and gauge radiation levels on the spot, which is essential for an effective area survey. In contrast, a handheld ionization chamber is used to measure the exposure rate at a specific point with higher accuracy, not for sweeping a room. TLDs and film badges measure accumulated dose over time and don’t provide instant readings, so they’re not suitable for live area surveying. So, for scanning and quickly assessing an area, the Geiger-Mueller detector is the best choice.

When surveying an area for radiation, you want real-time feedback as you move to quickly locate where radiation is present. A Geiger-Mueller detector fits this role because it responds to ionizing events and gives immediate readings, often as a count rate per minute, with audible clicks as you sweep the space. This lets you map out hotspots and gauge radiation levels on the spot, which is essential for an effective area survey. In contrast, a handheld ionization chamber is used to measure the exposure rate at a specific point with higher accuracy, not for sweeping a room. TLDs and film badges measure accumulated dose over time and don’t provide instant readings, so they’re not suitable for live area surveying. So, for scanning and quickly assessing an area, the Geiger-Mueller detector is the best choice.