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The role of X-ray fluorescence spectrometer lines

Release time: 2020-01-13 10:27:45 Click: 453

X 射线结晶学 ,在分析仪器方面的应用也非常好。 X -rays were originally used in medical imaging diagnostics and X -ray crystallography, and they are also very useful in analytical instruments. 。 This is due to the high penetrating power of X -rays, which can penetrate many substances that are opaque to visible light, such as ink paper and wood . This kind of invisible radiation can cause many solid materials to generate visible fluorescence, make photographic films sensitive, and effect air ionization.

X 射线,其光子能量是不同的,频率赿高,波长赿短,光子能量赿大。 X -rays with different frequencies and wavelengths have different photon energies. The frequency is high, the wavelength is short, and the photon energy is large.

X 射线是由大量以光速运动的、具有确定能量的粒子流,这些粒子称为光量子,或简称为光子。 From a particle perspective, X -rays consist of a large stream of particles with a defined energy moving at the speed of light. These particles are called light quanta, or simply photons.

γ 射线之间的电磁波。 X -rays are a stream of particles produced by the transition of electrons in atoms between two energy levels with very different energies, and are electromagnetic waves with wavelengths between ultraviolet and gamma rays. 0.01~100 埃之间。 Its wavelength is very short between about 0.01 and 100 angstroms. WK 伦琴于 1895 年发现,故又称伦琴射线。 Discovered by German physicist WK Roentgen in 1895 , it is also called Roentgen ray.

X荧光光谱仪线的作用

The role of X-ray fluorescence spectrometer lines

1. Penetration effect. 射线因其波长短,能量大,照在物质上时,仅一部分被物质所吸收,大部分经由原子间隙而透过,表现出很强的穿透能力。 Because of its short wavelength and high energy, X -rays are only partially absorbed by the substance and most of them are transmitted through the atomic gap, showing a strong penetrating ability. 射线穿透物质的能力与 X 射线光子的能量有关, X 射线的波长越短,光子的能量越大,穿透力越强。 The ability of X - rays to penetrate matter is related to the energy of X -ray photons. The shorter the wavelength of X -rays, the greater the energy of the photons and the stronger the penetrating power. 射线的穿透力也与物质密度有关,利用差别吸收这种性质可以把密度不同的物质区分开来。 The penetrating power of X -rays is also related to the density of substances. Differential absorption can be used to distinguish substances with different densities.

2. Ionization. X 射线照射时,可使核外电子脱离原子轨道产生电离。 When a substance is irradiated with X -rays, it can cause electrons outside the nucleus to escape from the atomic orbit to produce ionization. X 射线的照射量,根据这个原理制成了 X 射线测量仪器。 The amount of ionizing charge can be used to determine the amount of X -ray exposure. Based on this principle, an X -ray measuring instrument is manufactured. Under ionization, gases can conduct electricity; certain substances can undergo chemical reactions; and various biological effects can be induced in organisms.

3. Fluorescence. 射线波长很短不可见,但它照射到某些化合物如磷、铂氰化钡、硫化锌镉、钨酸钙等时,可使物质发生荧光(可见光或紫外线),荧光的强弱与 X 射线量成正比。 The X -ray wavelength is very short and invisible, but when it irradiates certain compounds such as phosphorus, platinum barium cyanide, zinc cadmium sulfide, calcium tungstate, etc., it can cause the substance to fluoresce (visible light or ultraviolet). The amount of rays is proportional. X 射线应用于透视的基础,利用这种荧光作用可制成荧光屏,用作透视时观察 X 射线通过人体组织的影像,也可制成增感屏,用作摄影时增强胶片的感光量。 This effect is the basis for X -ray application in perspective. This fluorescent effect can be used to make a fluorescent screen, which can be used to observe the image of X -rays passing through human tissues during fluoroscopy . Photosensitivity.

4. Thermal effect. X 射线能大部分被转变成热能,使物体温度升高。 Most of the X -ray energy absorbed by the substance is converted into thermal energy, which raises the temperature of the object.

5. Interference, diffraction, reflection and refraction. X 射线显微镜、波长测定和物质结构分析中都得到应用。 These effects are applied in X -ray microscopy, wavelength measurement and material structure analysis.

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hot key words:

Direct Reading Spectrometer

High frequency infrared carbon and sulfur analyzer

Spark direct reading spectrometer

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Photoelectric direct reading spectrum analyzer


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