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Medical Applications of a Small Sample X-Ray Fluorescence System†

Published online by Cambridge University Press:  06 March 2019

A. C. Alfrey ,
L. L. Nunnelley ,
H. Rudolph  and
W. R. Smythe
A. C. Alfrey
Affiliation:
Department of Medicine Veterans Administration Hospital University of Colorado Medical Center Denver, Colorado 80220
L. L. Nunnelley
Affiliation:
Department of Physics and Astrophysics University of Colorado Boulder, Colorado 80302
H. Rudolph*
Affiliation:
Department of Physics and Astrophysics University of Colorado Boulder, Colorado 80302
W. R. Smythe
Affiliation:
Department of Physics and Astrophysics University of Colorado Boulder, Colorado 80302
*
*Present address: Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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Abstract

A quantitative x-ray fluorescence (XRF) analytical system has been developed with the emphasis on small sample size. The system employs a two kilowatt tungsten anode x-ray tube, and an 80 mm2 lithium drifted silicon x-ray detector arranged in a compact geometry. Operation at 55 kV and 20 m A give a sensitivity of 153 counts/min/ng at Z=42 (molybdenum). A computer controlled target changer makes it capable of analyzing 32 targets automatically. The sample target is rotated during irradiation, so that the average sample position is defined to 0.2 mm. Several sets of 5 to 9 calibration targets have exhibited a standard deviation of less than 1%.

Type
X-Ray Spectrometry in Biomedical Applications
Information
Advances in X-Ray Analysis , Volume 19: Twenty-Fourth Annual Conference on Applications of X-ray Analysis, August 6-8, 1975 , 1975 , pp. 497 - 510
Copyright
Copyright © International Centre for Diffraction Data 1975

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Footnotes

†

Supported in part by NIH, NSF, and ERDA.

References

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