The JSX-3222 analyzer is an energy-dispersive fluorescent X-ray spectrometer developed to analyze cadmium (Cd) included in plastic and the electric wire film material, etc. promptly. The elements range that can be measured is from sodium (Na) to uranium (U). Liquid-nitrogen cooling for the high performance detector is needed only during the analyzing time. The vacuum and atmosphere are switched to the measurement atmosphere by the one button operation. When X-rays (primary X-rays) are illuminated from the X-ray tube to the specimen, fluorescence X-rays having wavelengths (energies) peculiar to the constituent elements of the specimen are produced from the elements.
There are two methods to investigate the energies. The first method is Qualitative analysis which can be made by investigating the wavelengths of the fluorescence X-rays and the other method is quantitative analysis by investigating the X-ray dose. One is for optical separation to them and the other is to use the energy separation characteristic of the X-ray detector. The former is called the wavelength dispersive method an: the latter the energy dispersive method. The element analyzer employs the latter method. As seen from the figure, since the energy dispersive X-ray spectrometer has no moving parts uses a simple optical system, its structure is simple and compact. And since the detector can be installed the specimen, the X-ray solid angle of collection can be made large, thus presenting many features such as