When performing gamma spectroscopy, a semiconductor detector is used to measure:

When performing gamma spectroscopy, a semiconductor detector is used to measure:

• A. Radioactivity
• B. Occupation radiation dose
• C. Photon energies
• D. Patient radiation dose

Answer: (C)

Gamma spectroscopy is all about determining the energies of individual gamma photons to identify which radionuclides are present. A semiconductor detector converts each incoming photon into an electrical signal whose height is proportional to the photon’s energy, producing a spectrum with sharp peaks at the characteristic energies. This high energy resolution lets you distinguish closely spaced gamma lines and accurately assign energies to specific isotopes. The other options describe measuring how much radioactivity there is or the dose received, which are based on counting rates or dose metrics rather than the energy content of the photons. So a semiconductor detector in gamma spectroscopy is used to measure photon energies.

Gamma spectroscopy is all about determining the energies of individual gamma photons to identify which radionuclides are present. A semiconductor detector converts each incoming photon into an electrical signal whose height is proportional to the photon’s energy, producing a spectrum with sharp peaks at the characteristic energies. This high energy resolution lets you distinguish closely spaced gamma lines and accurately assign energies to specific isotopes. The other options describe measuring how much radioactivity there is or the dose received, which are based on counting rates or dose metrics rather than the energy content of the photons. So a semiconductor detector in gamma spectroscopy is used to measure photon energies.