Use of toroidal monochromators in a hybrid XRF system to obtain increased effectiveness ratios

A combination of energy and wavelength dispersive components in a new hybrid XRF system has yielded a tenfold improvement in the effectiveness ratio (number of counts in the region of interest divided by the total number of other counts collected by the detector and eletronics) over the use of a detector directly viewing a specimen illuminated by primary X-rays with or without filters or by secondary targets. Monochromatic illumination of the specimen allows the use of a fundamental parameters technique for quantitative analysis without the need for a multitude of standards. (orig.)