Gamma spectroscopy
（重定向自Gamma spectrometry）
![The gamma-ray spectrum of natural uranium, showing about a dozen discrete lines superimposed on a smooth continuum, allows the identification the nuclides 226Ra, 214Pb, and 214Bi of the uranium decay chain.](/Images/godic/202501/14/Gammaspektrum_Uranerz0208.jpg")
![Laboratory equipment for determination of γ-radiation spectrum with a scintillation counter. The output from the scintillation counter goes to a Multichannel Analyser which processes and formats the data.](/Images/godic/202501/14/Scintillation_counter_as_a_spectrometer0208.jpg")
![Pulse-Height Analyzer Principal](/Images/godic/202501/14/Gamma_Pulse-Height_Analyzer_Principal0208.png")
![Figure 1: Sodium iodide gamma spectrum of caesium-137 (137Cs)](/Images/godic/202501/14/Cs137_Spectrum0208.PNG")
Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, in such as the nuclear industry, geochemical investigation, and astrophysics.
Most radioactive sources produce gamma rays, which are of various energies and intensities. When these emissions are detected and analyzed with a spectroscopy system, a gamma-ray energy spectrum can be produced.