Comparison of the NIST and BIPM Air-Kerma Standards for Measurements in the Low-Energy X-Ray Range

Published

February 1, 1999

Author(s)

D T. Burns, P J. Lamperti, C M. O'Brien

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 at 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 for 10 kilovolts (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 results at the 80 kV beam quality are less favorable, with agreement at the 1% level.

Citation

Journal of Research (NIST JRES) -

Volume

104 No. 2

NIST Pub Series

Journal of Research (NIST JRES)

Pub Type

NIST Pubs

Keywords

air-kerma, free-air ionization chamber, primary standard, reference radiation qualities

Citation

Burns, D. , Lamperti, P. and O'Brien, C. (1999), Comparison of the NIST and BIPM Air-Kerma Standards for Measurements in the Low-Energy X-Ray Range, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed October 14, 2025)