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This article is cited in 6 scientific papers (total in 6 papers)
INSTRUMENTS AND METHODS OF INVESTIGATION
Desorption processes in the measurement of weak currents
V. G. Lukin, O. G. Khvostenko Institute of Molecular and Crystal Physics — Subdivision of the Ufa Federal Research Center, Russian Academy of Sciences
Abstract:
It was previously shown that the experimental meas„urement 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 de„sorbed ions due to the differences among their kinetic energies.
Received: April 11, 2019 Revised: June 19, 2019 Accepted: July 11, 2019
Citation:
V. G. Lukin, O. G. Khvostenko, “Desorption processes in the measurement of weak currents”, UFN, 190:5 (2020), 525–538; Phys. Usp., 63:5 (2020), 487–499
Linking options:
https://www.mathnet.ru/eng/ufn6528 https://www.mathnet.ru/eng/ufn/v190/i5/p525
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Abstract page: | 161 | Full-text PDF : | 15 | References: | 18 | First page: | 7 |
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