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X-Ray Fluorescence Analysis Capability of HGI2 Detector Systems

  • Y.J. Wang (a1) and J.S. IWANCZYK (a1)

Abstract

A laboratory XRF analysis system employing an HgI2 spectrometer detector has been built. The system consists of an x-ray generator tube, a rotating carousel holding multiple XRF targets, and a probe head containing the HgI2 detector. Tests have been performed on several samples, under vacuum, helium and nitrogen ambient atmospheric conditions. This is of particular interest, since the applications for such an XRF system include operation under different ambient conditions. For applications in terrestrial and space planetary exploration, the expected temperatures and gas ambient will vary widely. Comparative analyses using the various gases were made on spectra obtained from standard geological samples.

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[1] Bertin, E.P., “Principles and Practice of X-ray Spectrometric Analysis,” Plenum Press, New York, 1975.
[2] Iwanczyk, J.S., “Advances in Mercuric Iodide X-ray Detectors and Low Noise Preamplification Systems,” Nucl. Inst. and Meth, Vol. A283, No. 2, Nov. 1, 1989, pp. 208214.
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[4] Iwanczyk, J.S., Wang, Y.J., Bradley, J.G., Conley, J.M., Albee, A.L., and Economou, T.E., “Performance and Durability of HgI 2 X-ray Detectors for Space Missions,” IEEE Trans. Nucl. Sci., Vol. 37, No. 1 (1989), pp. 841845.
[5] Iwanczyk, J.S., Wang, Y.J., Bradley, J.G., Albee, A.L., and Schnepple, W.F., “Advances in the Development of Encapsulants for Mercuric Iodide X-ray Detectors,” To be published in IEEE Trans. Nucl. Sci., Dec., 1990.
[6] Economou, T.E., and Iwanczyk, J.S., “Development of Mercuric Iodide X-ray and Alpha Backscattering Spectrometers for Space Applications,” Nucl. Inst. and Meth., Vol. A283, No. 2, Nov. 1, 1989, pp. 352354.
[7] Iwanczyk, J.S., Wang, Y.J., Dorri, N., Dabrowski, A.J., Economou, T.E. and Turkevich, A.L., “Use of Mercuric Iodide X-ray Detectors with Alpha Backscattering Spectrometers for Space Applications,” IEEE Trans. Nucl. Sci. Vol. 38, No. 2 (1991), pp. 574579.
[8] Iwanczyk, J.S., Wang, Y.J. and Graham, W.R., “Use of HgI2 X-ray Detectors for the Detection of Lead in Paint,” Proceeding of 8th Annual Waste Testing and Quality Assurance Symposium, pp. 2842, Crystal City, Arlington, VA, July 13-17, 1992.
[9] Wang, Y.J., Iwanczyk, J.S. and Graham, W.R., “Evaluation of HgI2 Detectors for Lead Detection in Paint,” Presented at IEEE Nuclear Science Symposium, Orlando, Florida, Oct. 25-31, 1992. To be published in IEEE Transactions on Nuclear Science.
[10] Iwanczyk, J.S., Dorri, N., Wang, M., Szczbiot, R. W., Dabrowski, A.J., Hedman, B., Hodgson, K.O. and Patt, B.E., “20-Element HgI2 Energy Dispersive X-ray Array Detector System,” IEEE Trans. Nucl. Sci. Vol. 39, No. 5 (1992), pp. 12751280.

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