Comparison of the NIST and BIPM Air-Kerma Standards for Measurements in the Low-Energy X-Ray Range |
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Authors: | D T Burns P Lamperti M O’Brien |
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Affiliation: | Bureau International des Poids et Mesures, F-92312 Sèvres Cedex France;National Institute of Standards and Technology, Gaithersburg, MD 20899-0001, USA |
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Abstract: | A direct comparison was made between the air-kerma standards used for the measurement of low-energy x rays at the National Institute of Standards and Technology (NIST) and the Bureau International des Poids et Mesures (BIPM). The comparison was carried out at the BIPM using the BIPM reference beam qualities in the range from 10 kV to 100 kV. The results show the standards to be in agreement to around 0.5 % at reference beam qualities up to 50 kV and at 100 kV. The result at the 80 kV beam quality is less favorable, with agreement at the 1 % level. |
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Keywords: | air kerma free-air ionization chamber primary standard reference radiation qualities |
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