APPARATUS FOR SELECTING PRODUCTS ON THE BASIS OF THEIR COMPOSITION BY X RAY FLUORESCENT SPECTROSCOPY AND CORRESPONDING SELECTION METHOD

摘要

An apparatus for selecting products on the basis of their composition via X-ray fluorescence spectroscopy comprises an X-ray source (11) that emits an X-ray beam (XB, XBC) towards a product sample (20), and a particle detector (15) for receiving an X-ray beam (XBR) diffused by said product sample (20) and generating a signal received that can be analysed to determine a chemical composition of said product sample (20) and select a type of product corresponding to said chemical composition of the product sample (20). According to the invention, the aforesaid apparatus (10) comprises a first vacuum chamber (13) located between an output (45) of the apparatus (10) facing the product sample (20) and said X-ray source (11), and a second vacuum chamber (14) located between said output (45) of the apparatus (10) facing the product sample (20) and said detector (15), said apparatus (10) further comprising an optical module (12) with polycapillary lens located downstream of said X-ray source (11), which is configured for focusing said X-ray beam (XB) and is moreover associated in a vacuum-tight way to said first vacuum chamber (13).