Dt. Burns et al., Comparison of the NIST and BIPM air-kerma standards for measurements in the low-energy x-ray range, J RES NAT I, 104(2), 1999, pp. 135-140
A direct comparison was made between the air-kerma standards used for the m
easurement 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 q
ualities 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.