| 摘要 |
1,179,894. Photo-electric X-ray fluorescence analysis. MANSFIELD KOMBINAT 'WILHELM PIECK" VEB. Feb. 16, 1967, No. 7404/67. Heading G1A. X-ray fluorescence analysis is carried out on a sample e. g. a liquid 5 by using two X-ray spectrometers, one arranged to measure the characteristic fluorescence radiation of elements in the sample and the other to measure the general background secondary radiation. The apparatus comprises an X-ray tube/the anode of which is designed to produce a beam having two intensity maxima, spaced from one another in a transverse plane parallel to the unit window of the tube 1. A collimator 6 comprising a number of parallel plates, jointed by a central web member (10, Fig.2, not shown) directs the two intensity maxima to the crystals 7, 8 of two Bragg spectrometers. One crystal 7 reflects the wavelength corresponding to the peak of the fluorescence radiation curve towards the detector 9 and the crystal 8 reflects a wavelength just outside the fluorescence curve corresponding to a general background secondary radiation level, Fig. 3 (not shown). The detector 9 is a proportional counter have a communicating chamber and two decoupled counting wires. In another arrangement, Fig. 4 (not shown) two separate collimators are used to direct separate beams to the spectrometer crystals. |
