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Desorption processes in the measurement of weak currents

机译:弱电流测量中的解吸过程

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It was previously shown that the experimental measurement of the lifetime of gas-phase negative ions formed in autoionization states during resonant electron capture by molecules is inherently fraught with inaccuracy due to adsorption of ions on the walls of the ionization chamber, with some of them surviving there and staying stabilized as 'eternal' till they eventually desorb back into the vacuum and merge with the total ion flow; this leads to an upward distortion of lifetime measurements. This paper describes a technique for removing desorbed ions from the total flow using an ion filter that lets only gas-phase ions pass into the detection system but detains the desorbed ions due to the differences among their kinetic energies.
机译:之前的说明,在分子谐振电子捕获期间在谐振电子捕获期间在谐振电子捕获过程中形成的气相负离子的寿命的实验测量由于电离室壁上的离子吸附而具有不准确的不准确性,其中一些幸存下来 在那里保持稳定为“永恒”,直到它们最终解吸回到真空并与总离子流合并; 这导致寿命测量的向上变形。 本文介绍了一种通过使用离子过滤器从总流动去吸收离子的技术,所述离子过滤器使得气相离子进入检测系统,而是由于其动力学能量之间的差异释放解吸离子。

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