| Автор | M Allan |
| Автор | I I Fabrikant |
| Дата выпуска | 2002-02-28 |
| dc.description | Electron energy loss spectra in CH<sub>3</sub>I reveal the excitation of the nν<sub>3</sub> and ν<sub>1</sub> + nν<sub>3</sub> progressions near threshold, where ν<sub>3</sub> is the C-I stretch and ν<sub>1</sub> the symmetric CH<sub>3</sub> stretch. Relative elastic and vibrationally inelastic cross sections have been measured as a function of electron energy at 135°. They exhibit many sharp structures at the nν<sub>3</sub>, 1ν<sub>1</sub> and 2ν<sub>1</sub> thresholds. A threshold peak is observed for the excitation of the fundamental 1ν<sub>3</sub>, but only weak threshold peaks are observed for the higher overtones. The shapes of the cross sections including the sharp structures are well reproduced by a quasiclassical R-matrix resonance theory with non-local potentials. Thermal population of the 1ν<sub>3</sub> level permitted the measurement of the superelastic cross section. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Threshold peaks and structures in vibrational excitation of CH<sub>3</sub>I by electron impact |
| Тип | paper |
| DOI | 10.1088/0953-4075/35/4/324 |
| Electronic ISSN | 1361-6455 |
| Print ISSN | 0953-4075 |
| Журнал | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Том | 35 |
| Первая страница | 1025 |
| Последняя страница | 1034 |
| Выпуск | 4 |
