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晶体是X射线光谱仪的心脏。一个良好的分析晶体应具备以下主要特点:(1)波长范围应适合于所要测量的分析线;(2)反射强度大;(3)分辨率高——高的色散能力和窄的衍射峰宽度;(4)峰背比高;(5)使用时稳定性好,并能经受X射线的长时间照射。最主要的是晶体要有高的衍射强度和好的分辨率,但在我们常用的晶体TAP,PET Ge,InSb,LiF中,由于晶体的潮解,X射线照射的损伤以及酸碱的化学吸附,使晶体的反射强度大大减弱,以致无法使用。为了使这些价格昂贵的晶体
Crystals are the heart of the X-ray spectrometer. A good analytical crystal should have the following key features: (1) The wavelength range should be suitable for the analytical line to be measured; (2) The reflected intensity is large; (3) High resolution - high dispersion capability and narrow diffraction peak width ; (4) peak to back height; (5) good stability when used, and can withstand prolonged exposure to X-rays. The most important is that the crystal has high diffraction intensity and good resolution, but in our commonly used crystal TAP, PET Ge, InSb, LiF, due to crystal deliquescence, X-ray irradiation damage and acid-base chemical adsorption, The crystal reflection intensity greatly weakened, so can not be used. In order to make these expensive crystals