# Revision of the ANSI N42.14 performance standard for Ge gamma-ray spectrometry (2023)

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## Abstract

A major revision of the American National Standards Institute (ANSI) Standard N42.14, “Calibration and Use of Germanium Detectors for the Measurement of Gamma-Ray Emission Rates of Radionuclides”, is in process. The revised standard is more detailed and addresses aspects of Ge gamma-ray spectrometry not covered in the previous standard. Instructions are provided for initial setup, energy calibration, efficiency measurement, and measurement or calculation of corrections for pulse pileup, radioactive decay and absorption. Performance tests are provided (1) to evaluate the peak-finding algorithm, (2) to verify the independence of the net-peak area with respect to the base-line height, (3) to evaluate the doublet-fitting algorithm, and (4) to verify the accuracy of pulse pileup corrections. A simple procedure to assess the magnitude of cascade-coincidence summing is presented. The assignment of uncertainties, averaging of multiple measurements and propagation of uncertainties are discussed. Appendices to the standard contain procedures for optional use in the (1) setup and characterization of a Ge gamma-ray spectrometer, (2) preparation of working standards or QC samples, (3) measurement of the peak position and area, (4) correction for cascade gamma-ray summing, and (5) construction of a detector shield.

## References (2)

• R.J. Gehrke, D.D. Hoppes, F.J. Schima, D.M. Montgomery and J.E. Cline (Writing Group), Calibration and use of germanium...
• P. Giacomo

(1981)

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