Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-23T14:53:47.343Z Has data issue: false hasContentIssue false
  • English
  • Français

Window Area Effects in the Detector Efficiency for Source Excited EDXRF Geometries

Published online by Cambridge University Press:  06 March 2019

J.M.F. dos Santos  and
Benilde E.O. Costa
J.M.F. dos Santos
Affiliation:
Physics Department University of Coimbra 3000 Coimbra Portugal
Benilde E.O. Costa
Affiliation:
Physics Department University of Coimbra 3000 Coimbra Portugal
Get access

Abstract

The efficiency dependence on detector window area for three different geometries of source excited energy dispersive X-ray fluorescence (EDXRF) analysis systems are calculated using the Monte Carlo method. Two typical samples (coal and oil) are considered for discussion. The results show that the efficiency is affected mainly by geometric factors: source-to-sample distance and absorption of the exciting X-rays; fluorescent photon self-absorption has a much smaller effect.

Type
VII. XRF Techniques, Instrumentation and Mathematical Models
Information
Advances in X-Ray Analysis , Volume 31: Thirty-Sixth Annual Conference on Applications of X-ray Analysis, August 3-7, 1987 , 1987 , pp. 455 - 459
Copyright
Copyright © International Centre for Diffraction Data 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. dos Santos, J.M.F. and H, C.A.. Conde, A comparative study of efficiencies for different detector geometries for source excited EDXRF systems, Nucl, Instr. Meth. A242: 563 (1986).Google Scholar
2. Conde, C.A.N. and F, J.M.. dos Santos, The recessed source geometry for source excited X-ray fluorescence analysis, Adv. X-Ray Anal. 29: 545 (1986).Google Scholar
3. P, A.J.. Policarpo, L., Charge and scintillation gaseous detectors for low energy X-rays, in: “X-Ray Microscopy,” Schumal, G. and Rudolph, D., eds., Springer-Verlag, Berlin (1984).Google Scholar
4. Simons, D.G., de Korte, P.A.J., Peacock, A. and J, Eleeker, A.M., Energy resolution limitations in a gas scintillation proportional counter, paper presented at the SPIE-Symposium on X-Say Instrumentation in ’ Astronomy, Cannes (1985).Google Scholar
5. Conde, C.A.N., Requicha, L.F. Ferreira and A, A.J.. de Campos, The gas proportional scintillation counter as a room-temperature detector for energy dispersive X-ray fluorescence analysis, Adv. X-Ray Anal. 25: 39 (1982).Google Scholar
6. dos Santoa, J. M.F. and Conde, C. A. N., Opt imiaat ion of g domes try for radioisotope excited X-ray fluorescence spectrometry, to be published in X-Ray Spectroin. (1987).Google Scholar