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Parametric study of Xe2 * dimer in high-pressure electrical discharges |
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| Authors: | SK Lam D Lo CE Zheng CL Yuan C Shangguan TL Yang IV Kochetov |
| Institution: | (1) Physics Department, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P.R. China, CN;(2) EL. EN. Spa, 50 041 Calenzano, Florence, Italy, IT;(3) Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai, P.R. China, CN;(4) Troitsk Institute for Innovation and Thermonuclear Research, Troitsk, Moscow Region, 142 190 Russia, RU |
| Abstract: | Optical and electrical properties of a high-pressure discharge of pure xenon and xenon-helium and xenon-neon mixtures are studied experimentally. Uniform discharge at total gas pressure as high as 10 atm is achieved in xenon-lean mixtures. Vacuum ultraviolet emissions due to the first and second continua of Xe2 * are examined spectroscopically. The vibrational relaxation rate constant kHe of Xe2 * by helium is determined to be of the order of 10-11 cm3 s-1 from spectroscopic data. Laser oscillation for the 172-nm band was attempted without success. Discharge instability at high gas pressures is considered to the cause of the unsuccessful laser experiments. Some issues related to discharge instability in a high-pressure rare-gas discharge are discussed. Received: 1 October 2001 / Revised version: 11 June 2002 / Published online: 25 October 2002 RID="*" ID="*"Corresponding author. Fax: +852-2603/5204, E-mail: dlo@phy.mhk.edu.hk |
| Keywords: | PACS: 34 80 42 55 Gp 52 65 |
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