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Evaluation of HgI2 detectors for lead detection in paint

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3 Author(s)
Wang, Y.J. ; Xsirius Inc., Marina del Rey, CA, USA ; Iwanczyk, J.S. ; Graham, W.R.

A laboratory study of HgI2 spectrometers used for in situ determination of lead on painted surfaces was conducted. 109 Cd and 57Co isotopes were used to excite lead characteristic X-rays from samples. The energy resolution of HgI2 detectors in the energy region corresponding to lead K X-rays was measured. An energy resolution of 880 eV full-width half-maximum (FWHM) for the 60-keV line from a 241Am source was obtained. Measurements using thin film standards ranging from 0.5 mg Pb/cm2 to 2 mg Pb/cm2 were conducted. The detection limits the accuracy and the precision of the measurements were estimated. Based upon a comparison of the results obtained with the performance of existing detector technology, HgI2 detectors seem to be the best solution for hand-held X-ray fluorescence (XRF) lead analyzers

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Nuclear Science, IEEE Transactions on  (Volume:40 ,  Issue: 4 )