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A detailed evaluation of counting losses of detectors in wavelength‐dispersion x‐ray spectroscopy
Author(s) -
Banerjee Prabuddha
Publication year - 1983
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300120304
Subject(s) - detector , dead time , wavelength , exponential decay , dispersion (optics) , exponential function , photon counting , optics , physics , spectroscopy , computational physics , mathematics , mathematical analysis , nuclear physics , quantum mechanics
Abstract The exponential equation R 0 = R · e R 0τ describes the counting losses in wavelength‐dispersive x‐ray spectroscopic (WDF) detectors up to very high counting rates. The correction error can be considerably lower than 1% for a true counting rate of 7 · 10 5 s −1 . The dead time constant τ has however to be determined very accurately for this. Methods of determining τ with the desired accuracy are also described. And finally, a formula for correcting for dead time losses for two detectors in series, where each detector has a different dead time, is deduced and verified by experiment. Here again, one can calculate the true counting rate with an accuracy of 1% at a true counting rate of about 7 · 10 5 s −1 .