Effect of helium on the Raman spectrum of methane in the 2500-3300 cm−1 range
The peak positions and halfwidths of the Q-branch of the ν1 band and the ratios of intensities of the Q-branches of ν3 and 2ν2 bands of methane are measured in a methane-helium mixture at different pressures and concentrations. An empirical model is developed for estimation of the He concentration i...
| Published in: | Atmospheric and oceanic optics Vol. 34, № 5. P. 395-399 |
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| Other Authors: | , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000894436 Перейти в каталог НБ ТГУ |
| Summary: | The peak positions and halfwidths of the Q-branch of the ν1 band and the ratios of intensities of the Q-branches of ν3 and 2ν2 bands of methane are measured in a methane-helium mixture at different pressures and concentrations. An empirical model is developed for estimation of the He concentration in a methane-containing medium from measurements of the above parameters. The error in the He concentration is found to be less than 1% when using the ν1 band halfwidth. The paths of improvement of this technique and enhancement of its accuracy are considered. |
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| Bibliography: | Библиогр.: 21 назв. |
| ISSN: | 1024-8560 |