Minniti, R.
and Czap, L.
(2011),
Comparison of Air Kerma Standards for Cs137 and Co60 Gamma-Ray Beams between the IAEA and NIST, Metrologia, [online], https://doi.org/10.1088/0026-1394/48/1A/06005, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905889
(Accessed October 13, 2025)
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Comparison of Air Kerma Standards for Cs137 and Co60 Gamma-Ray Beams between the IAEA and NIST
Published
Author(s)
, Ladislav Czap
Abstract
A comparison of the air kerma standard from 137Cs and 60Co gamma ray beams was performed between the NIST and IAEA. Two reference class ionization chambers owned by the IAEA were used as part of this comparison and were calibrated at each facility. The calibration coefficients were determined for both chambers and in both gamma-ray beams. The measurements were performed at the IAEA and NIST facilities during the fall of 2009. The comparison ratios between IAEA and NIST were 0.999 and 0.997 for the 137Cs and 60Co gamma ray beams respectively. The relative standard uncertainty for these ratios is 0.49%.Citation
Metrologia
Volume
48
Pub Type
Journals
Download Paper
Keywords
air kerma, calibration, cesium 137, cobalt 60, ionization chamber, primary standard, gamma-ray
Citation
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Created March 16, 2011, Updated April 2, 2025