| Автор | K A Berrington |
| Автор | P G Burke |
| Автор | L C G Freitas |
| Автор | A E Kingston |
| Дата выпуска | 1985-10-28 |
| dc.description | An R-matrix calculation for electron-helium scattering is described in which the eleven lowest target states of helium are included, using configuration interaction wavefunctions. Excitation cross sections are calculated up to 30 eV from the 1<sup>1</sup>S ground state and the metastable 2<sup>3</sup>S and 2<sup>1</sup>S states of helium to the higher n=2 states, and, for the first time in an ab initio calculation, to the n=3 states. The authors confirm their preliminary finding that the explicit coupling of the n=3 channels significantly reduces the cross sections calculated in an earlier five-state approximation, by up to 50% for n=1 to n=2 transitions at energies above the n=3 thresholds. Using the new cross section data, rate coefficients are calculated for temperatures up to 50000K for the transitions considered. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Electron excitation from the 1<sup>1</sup>S, 2<sup>3</sup>S and 2<sup>1</sup>S states of helium. An eleven-state R-matrix calculation |
| Тип | paper |
| DOI | 10.1088/0022-3700/18/20/016 |
| Print ISSN | 0022-3700 |
| Журнал | Journal of Physics B: Atomic and Molecular Physics |
| Том | 18 |
| Первая страница | 4135 |
| Последняя страница | 4147 |
| Аффилиация | K A Berrington; Dept. of Appl. Math. & Theor. Phys., Queen's Univ. of Belfast, UK |
| Аффилиация | P G Burke; Dept. of Appl. Math. & Theor. Phys., Queen's Univ. of Belfast, UK |
| Аффилиация | L C G Freitas; Dept. of Appl. Math. & Theor. Phys., Queen's Univ. of Belfast, UK |
| Аффилиация | A E Kingston; Dept. of Appl. Math. & Theor. Phys., Queen's Univ. of Belfast, UK |
| Выпуск | 20 |
