Relative counting efficiency

{
  "id": "MLC-T-CHM-010139",
  "term": "Relative counting efficiency",
  "field": "Chemistry",
  "definition": "A comparison of two detectors in which the efficiency of the detector under test, meaning the fraction of emitted radiation it records, is divided by the efficiency of a chosen reference detector. It is dimensionless and often quoted as a percentage. For a germanium gamma-ray detector the reference is conventionally a 3 inch by 3 inch sodium iodide crystal, with both compared for 1332 keV photons from cobalt-60.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "absolute counting efficiency"
  ],
  "references": [
    "PAC, 2021, 93, 69. 'Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)' on page 99 (https://doi.org/10.1515/pac-2019-0302)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/relative-counting-efficiency/"
}