Quantal near-threshold ionization of He by electron impact
| Autor: | D S F Crothers, N C Deb |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 33:L623-L628 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/33/17/105 |
| Popis: | A more accurate variant of the semiclassical quantum-mechanical treatment of Crothers (1986 J. Phys. B: At. Mol. Phys. 19 463-83) has been used to reinvestigate the ionization cross sections of He by electron impact at an excess energy of 2 eV above the threshold. All partial wave contributions for singlets and triplets are accounted for up to L = 6. It is found that within the coplanar geometry, both the symmetric and asymmetric triple differential cross sections, peaking at and near the Wannier ridge, are greatly improved when compared to the measurements (Rosel et al 1992 Phys. Rev. A 46 2539-52). However, far away from the Wannier ridge the triple differential cross sections tend to show qualitative differences from the measurements of Rosel et al. |
| Databáze: | OpenAIRE |
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