Novel graphite crystal derivation device

Abstract

The invention relates to a novel graphite crystal derivation device. The novel graphite crystal derivation device comprises a graphite crystal cylinder, a tungsten shielding core and a shielding-coreinstalling cap; the graphite crystal cylinder is integrally formed through graphite and a crystal; the shielding-core installing cap is detachably connected with the graphite crystal cylinder; the tungsten shielding core is fixedly connected with the shielding-core installing cap through a shielding-core support line, and after the shielding-core installing cap is connected with the graphite crystal cylinder, the tungsten shielding core is located in the center of the graphite crystal cylinder. The novel graphite crystal derivation device has the advantages that the derivation device adopts the graphite crystal cylinder directly precipitated inside a metal cylinder, a graphite cutting bonding procedure is omitted, and losses are reduced; a derivation device body is changed into an integrally-formed structure from a two-section structure, the integrality of a graphite crystal is kept, the installing mode of the shielding core is changed into a mode of one-end installation, the optimum state of the graphite is kept, and installation of the shielding core is also convenient.

Description

technical field [0001] The invention belongs to the field of material analysis, in particular to a novel graphite crystal derivative. Background technique [0002] Graphite crystal pre-diffraction X-ray fluorescence instrument is a special analytical instrument in post-processing production and research. [0003] A conventional energy dispersive X-ray fluorescence analyzer (XRF) generally consists of an X-ray tube, a detector, a spectrometer system and a data processing system. When measuring post-processing samples with strong radioactivity, the radioactivity of the sample itself will greatly increase the background of the spectrum and seriously affect the sensitivity of the measurement. [0004] The earliest Russian scientists developed a graphite crystal pre-diffraction X-ray fluorescence instrument, which solved the problem of the radioactivity of the sample. The Institute of Atomic Energy developed a graphite crystal pre-diffraction X-ray fluorescence instrument in 20...

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Problems solved by technology

In this way, there is a graphite slit 5 in the middle of the diffractometer, and the slit is in the best geometrical position for diffraction, which will adversely affect the diffraction effect

The first generation of diffractive devices use graphite flat plates, which are cut into thin strips with a width of 2mm and spliced ​​into brass cylinders. The cutting and bonding need to be very fine. Because graphite is fragile, there is often a loss of about 10%.

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