Luminescence characteristics of Xe2Cl excimer molecules under pumping the dense Xe—CCl4gas mixtures with a pulsed electron beam
Autor: | A I Mis'kevich, Guo Jinbo |
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Rok vydání: | 2013 |
Předmět: |
Materials science
chemistry.chemical_element Statistical and Nonlinear Physics Electron Excimer Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion Xenon chemistry Excited state Torr Content (measure theory) Electrical and Electronic Engineering Atomic physics Luminescence |
Zdroj: | Quantum Electronics. 43:489-495 |
ISSN: | 1468-4799 1063-7818 |
DOI: | 10.1070/qe2013v043n05abeh015022 |
Popis: | Temporal and spectral characteristics of the luminescence of dense Xe-CCl{sub 4} gas mixtures of different composition, excited by a 5-ns pulsed electron beam, were measured. The energy of the electrons amounted to 150 keV and the electron beam current pulse amplitude was 5 A. The gas mixtures were used containing Xe (38-700 Torr) and CCl{sub 4} (0.03-0.3 Torr). The studies were performed within the wavelength range 200-1200 nm using a MAYA-2000Pro diffraction grating spectrometer and a RIGOL DS 5022 ME fast digital oscilloscope. The luminescence lifetimes of the excimer molecules XeCl* (band with {lambda}{sub max} = 308 nm) and Xe{sub 2}Cl* (band with {lambda}{sub max} = 486 nm) were measured, as well as the constants of quenching by the components of the gas mixture for Xe{sub 2}Cl* molecules. A model of plasma-chemical processes for dense Xe-CCl{sub 4} gas mixtures with a very low content of the CCl{sub 4} donor is proposed. It is shown that in such 'poor' mixtures Xe{sub 2}Cl* molecules are mainly produced as a result of recombination of the Xe{sub 2}{sup +} and Cl{sup -} ions. (active media) |
Databáze: | OpenAIRE |
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