EVALUATION OF HGI2 DETECTORS FOR LEAD DETECTION IN PAINT

Citation
Yj. Wang et al., EVALUATION OF HGI2 DETECTORS FOR LEAD DETECTION IN PAINT, IEEE transactions on nuclear science, 40(4), 1993, pp. 846-850
Citations number
14
Categorie Soggetti
Nuclear Sciences & Tecnology","Engineering, Eletrical & Electronic
ISSN journal
00189499
Volume
40
Issue
4
Year of publication
1993
Part
1
Pages
846 - 850
Database
ISI
SICI code
0018-9499(1993)40:4<846:EOHDFL>2.0.ZU;2-Z
Abstract
We have conducted a laboratory study of HgI2 spectrometers used for in -situ determination of lead on painted surfaces. Cd-109 and Co-57 isot opes have been used to excite lead characteristic x-rays from samples. The energy resolution of HgI2 detectors in the energy region correspo nding to lead K x-rays has been measured. An energy resolution of 880 eV (FWHM) for the 60 keV line from an Am-241 source has been obtained. Measurements using thin film standards ranging from 0.5 mg Pb/cm2 to 2 mg Pb/cm2 have been conducted. Detection limits, accuracy and precis ion of the measurements have been estimated. Based upon a comparison o f the results that we have obtained with the performance of existing d etector technology, the HgI2 detectors seem to be the best solution fo r handheld XRF lead analyzers.