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公开(公告)号：US4264814A
公开(公告)日：1981-04-28
申请号：US62372
申请日：1979-07-31
CPC分类号： G01N33/0011 , G01N21/3504
摘要： A technique for considerably improving the sensitivity and specificity of infrared spectrometry as applied to quantitative determination of trace impurities in various carrier or solvent gases is presented. A gas to be examined for impurities is liquefied and infrared absorption spectra of the liquid are obtained. Spectral simplification and number densities of impurities in the optical path are substantially higher than are obtainable in similar gas-phase analyses. Carbon dioxide impurity (.about.2 ppm) present in commercial Xe and ppm levels of Freon 12 and vinyl chloride added to liquefied air are used to illustrate the method.
摘要翻译： 提出了一种用于显着提高红外光谱法灵敏度和特异性的技术，用于定量测定各种载体或溶剂气体中的微量杂质。 要检查杂质的气体是液化的，并且获得液体的红外吸收光谱。 光路中的光谱简化和杂质数密度明显高于类似气相分析中可获得的。 使用商业Xe中存在的二氧化碳杂质（DIFFERENCE 2ppm）和添加到液化空气中的氟利昂12和氯乙烯的ppm水平来说明该方法。
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公开(公告)号：US4554060A
公开(公告)日：1985-11-19
申请号：US69151
申请日：1979-08-23
CPC分类号： B01D59/34
摘要： Separation of carbon isotopes by photolysis of CS.sub.2 in cryogenic solutions of nitrogen, krypton and argon with 206 nm light from an iodine resonance lamp is reported. The spectral distribution of the ultraviolet absorption depends on solvent. Thus, in liquid nitrogen the photolytic decomposition rate of .sup.13 CS.sub.2 is greater than that of .sup.12 CS.sub.2 (because the absorption of 206 nm radiation is greater for .sup.13 CS.sub.2), whereas in liquid krypton and liquid argon the reverse is true. The shift in ultraviolet spectrum is a general phenomenon readily characterized as a function of solvent polarizability, and exhibits behavior similar to that for vibrational transitions occurring in the infrared.
摘要翻译： 据报道，通过使用来自碘共振灯的206nm光从氮，氪和氩的低温溶液中CS2的光解作用分离碳同位素。 紫外吸收的光谱分布取决于溶剂。 因此，在液氮中，13CS2的光解分解速率大于12CS2（由于对于13CS2的206nm辐射的吸收较大），而在液态氪气和液态氩中，反之亦然。 紫外光谱的变化是容易被表征为溶剂极化率的函数的一般现象，并且表现出类似于在红外线中发生的振动跃迁的行为。
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公开(公告)号：US4213836A
公开(公告)日：1980-07-22
申请号：US839238
申请日：1977-10-04
CPC分类号： B01J19/121 , B01D59/34 , C01B4/00
摘要： Hydrogen isotope separation is achieved by either (a) dissolving a hydrogen-bearing feedstock compound in a liquid solvent, or (b) liquefying a hydrogen-bearing feedstock compound, the liquid phase thus resulting being kept at a temperature at which spectral features of the feedstock relating to a particular hydrogen isotope are resolved, i.e., a clear-cut isotope shift is delineated, irradiating the liquid phase with monochromatic radiation of a wavelength which at least preferentially excites those molecules of the feedstock containing a first hydrogen isotope, inducing photochemical reaction in the excited molecules, and separating the reaction product containing the first isotope from the liquid phase.
摘要翻译： 氢同位素分离通过以下方式实现：（a）将含氢原料化合物溶解在液体溶剂中，或（b）液化含氢原料化合物，由此得到的液相保持在温度为 与特定氢同位素相关的原料被分解，即清晰的同位素位移被描绘，用至少优先激发含有第一氢同位素的原料的那些分子的波长的单色辐射照射液相，诱导光化学反应 在激发的分子中，并将含有第一同位素的反应产物与液相分离。
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公开(公告)号：US5043574A
公开(公告)日：1991-08-27
申请号：US574979
申请日：1990-08-30
IPC分类号： H05H3/00
CPC分类号： H05H3/00
摘要： The direction of a neutral particle beam (NPB) is determined by detecting Ly.alpha. radiation emitted during motional quenching of excited H(2S) atoms in the beam during movement of the atoms through a magnetic field. At least one detector is placed adjacent the beam exit to define an optical axis that intercepts the beam at a viewing angle to include a volume generating a selected number of photons for detection. The detection system includes a lens having an area that is small relative to the NPB area and a pixel array located in the focal plane of the lens. The lens viewing angle and area pixel array are selected to optimize the beam tilt sensitivity. In one embodiment, two detectors are placed coplanar with the beam axis to generate a difference signal that is insensitive to beam variations other than beam tilt.
摘要翻译： 中性粒子束（NPB）的方向通过在原子通过磁场运动期间检测在激发的H（2S）原子在运动淬灭期间发射的Lyα辐射来确定。 至少一个检测器被放置在与光束出口相邻的位置，以限定以观察角截取光束的光轴，以包括产生用于检测的选定数量的光子的体积。 检测系统包括具有相对于NPB区域小的区域的透镜和位于透镜的焦平面中的像素阵列。 选择透镜视角和面积像素阵列以优化光束倾斜灵敏度。 在一个实施例中，两个检测器被放置成与波束轴共面，以产生对波束偏移以外的波束变化不敏感的差分信号。
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