ISSN:
0049-8246
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
A new geometry for a radioactive source was developed for the XRF determination of trace elements in the range 0.1-50 μg in samples with diameters from 2-5 mm. The new set-up was constructed with five 241Am (45mCi each) point sources. The shielding and configuration of the source, as well as the choice of appropriate collimators in the optimal shapes and dimensions, were investigated in detail. The study was carried out to establish the conditions for obtaining maximum sensitivity. The count rates and signal-to-background ratios were compared with those obtained with an annular source and showed an improvement of a factor of ∼2 in the signal-to-background ratio and of a factor of 2-9 in the peak intensity for the elements studied (29≤ Z ≤ 47).
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/xrs.1300120205
