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Figure 4
The counter efficiency (i.e. the ratio between counting rates and photon rates) as a function of the normalized photon rate 2λτ; an ideal counter would have an efficiency of 1 over the entire range. The usual models [equations (1)[link] and (2)[link]], depicted with dashed lines, fail to describe the counter behavior of the two counters at higher photon rates. An improved approximation [equations (19)[link] and (20)[link]], indicated by the solid black lines, yields much better results and forms the basis of the semi-empirical model described in Section 3.4[link]. Systematic deviations are expected, due to the apparent baseline shift at high photon rates.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 5| September 2019| Pages 1621-1630
https://doi.org/10.1107/S1600577519007409
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