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Proactive disclosure Print version   | |  GSC Laboratories Gamma-ray spectrometry standards laboratory
The Radiation Geophysics Section maintains a laboratory spectrometer system for analysis of samples. This laboratory analyzes geological and environmental samples to measure absolute radioelement concentrations of potassium (%), equivalent uranium (ppm), and equivalent thorium (ppm). The spectrometer utilizes two, lead-shielded, 14 cm X 14 cm sodium iodide detectors. A GSC-designed software package processes data acquired by the detectors and records gamma-ray spectra from successive samples. Calibration of the spectrometer is accomplished using potassium (RGK-1), equivalent uranium (RGU-1), and equivalent thorium (RGTh-1) standards recognized by the International Atomic Energy Agency. Laboratory services are available on a cost recovery basis. For more information, please contact Rob Shives
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