Analytics' Mixed-Gamma-Ray Standards provide efficiency calibrations for germanium gamma-ray-spectrometer systems over a wide energy range. These radionuclide mixtures provide the most accurate calibrations available for modern, high-efficiency germanium detectors.
All custom-made, gamma-ray calibration standards must pass Analytics' quality-control requirements as follows:

Calibrations utilizing Analytics' standards demonstrate traceability to NIST. Analytics' participation in the NIST/ Nuclear Energy Institute (NIST/NEI) Measurements Assurance Program for the Nuclear Power Industry satisfies the requirements of the United States' Nuclear Regulatory Commission's Regulatory Guide 4.15, Revision 1, 1979, and ANSI N42.22-1995 American National Standard - Traceability of Radioactive Sources to the National Institute of Standards and Technology (NIST) and Associated Instrument Quality Control.

Each standard is prepared gravimetrically with a calibrated balance. After preparation, each standard is counted with a calibrated, germanium spectrometer system.