| Автор | A F J van Raan |
| Автор | J van Eck |
| Дата выпуска | 1974-10-21 |
| dc.description | Absolute apparent cross sections for electron-impact excitation of helium to the 4<sup>3</sup>D level measured as a function of target-cross pressure (3*10<sup>-5</sup><p<3*10<sup>-3</sup> Torr) have been analysed by means of the 'F-cascade model'. proposed by St John and Fowler, (1961), in order to study the process of collisional transfer in helium. Special attention is paid to imprisonment of resonance radiation. It is found that scaling of the collisional transfer cross sections with a power of the principal quantum number n leads to results which are inconsistent with the experimental findings. By extrapolation of the apparent 4<sup>3</sup>D cross section to zero pressure we are able to estimate electron-impact excitation cross sections for the 4<sup>1</sup>F level. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The influence of collisional transfer of excitation energy in helium on the electron-impact excitation of the 4<sup>3</sup>D level |
| Тип | paper |
| DOI | 10.1088/0022-3700/7/15/009 |
| Print ISSN | 0022-3700 |
| Журнал | Journal of Physics B: Atomic and Molecular Physics |
| Том | 7 |
| Первая страница | 2003 |
| Последняя страница | 2020 |
| Аффилиация | A F J van Raan; Univ. Utrecht, Netherlands |
| Аффилиация | J van Eck; Univ. Utrecht, Netherlands |
| Выпуск | 15 |
