A semi-empirical derivation of thin-film sensitivities for EDXRF spectrometers

✍ Scribed by Robert B. Kellogg

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 60 KB
• Volume: 28
• Category: Article
• ISSN: 0049-8246
• DOI: 10.1002/(sici)1097-4539(199909/10)28:5<406::aid-xrs376>3.0.co;2-q

✦ Synopsis

A semi-empirical calibration method for single-layer thin films is described which is based on measured standards and cross-sections generated by the National Institute of Standards and Technology database XGAM. A Fortran program, XRFCAL, fits the ratio of measured sensitivity to the relative excitation and detection efficiency to a second-order polynomial in atomic number. The approach is intended not only to provide sensitivities for elements that have no reliable standards but also to improve on the calibration for elements that do. It is applicable only to K-line radiation and silicon detector energy-dispersive XRF spectrometers with secondary or monochromatic excitation.