Which includes filters for measurement of radiation energy?

Which includes filters for measurement of radiation energy?

• A. Handheld ionization chamber
• B. Film badge
• C. TLD
• D. OSL

Answer: (B)

Filters are used to reveal the energy of incoming radiation because a detector’s response changes with photon energy, and filters selectively attenuate different energies. A film badge is designed with a film element plus a set of filters of varying materials and thicknesses. When the badge is exposed, the film darkens in a way that depends on both the dose and the energy of the photons. By reading the film through each filter and comparing the resulting densities, you can infer the radiation’s energy and adjust the dose reading accordingly. This explicit use of multiple filters to determine energy is what makes the film badge the best choice for measuring radiation energy. Handheld ionization chambers provide real-time dose readings with less emphasis on energy discrimination, while TLD and OSL dosimeters can be used with filters but are not as inherently energy-monitoring in the standard setup as the film badge.

Filters are used to reveal the energy of incoming radiation because a detector’s response changes with photon energy, and filters selectively attenuate different energies. A film badge is designed with a film element plus a set of filters of varying materials and thicknesses. When the badge is exposed, the film darkens in a way that depends on both the dose and the energy of the photons. By reading the film through each filter and comparing the resulting densities, you can infer the radiation’s energy and adjust the dose reading accordingly. This explicit use of multiple filters to determine energy is what makes the film badge the best choice for measuring radiation energy. Handheld ionization chambers provide real-time dose readings with less emphasis on energy discrimination, while TLD and OSL dosimeters can be used with filters but are not as inherently energy-monitoring in the standard setup as the film badge.