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Pseudostate effects on positron-helium excitation cross sections at intermediate energies
| Content Provider | Scilit |
|---|---|
| Author | Willis, S. L. McDowell, M. R. C. |
| Copyright Year | 1982 |
| Description | Journal: Journal of Physics B: Atomic and Molecular Physics Results of two five-state close-coupling (5CC) calculations of positron excitation of helium $(1^{1}$S to $2^{1}S,2^{1}$P) at energies from 40 to 200 eV are presented and compared with an earlier 3CC calculation. In contrast to the $e^{-}$ case, inclusion of $k^{1}$P and $4^{1}$S pseudostates increases the cross sections (by 40% at 60 eV). For the $2^{1}$P excitation the effect is almost entirely due to the $k^{1}$P pseudostate. The $e^{+}$ cross sections are substantially larger than those for $e^{-}$. Total cross sections are given, but are poor below 100 eV due to neglect of positronium formation. |
| Related Links | http://iopscience.iop.org/article/10.1088/0022-3700/15/1/007/pdf |
| Ending Page | L35 |
| Page Count | 5 |
| Starting Page | L31 |
| ISSN | 00223700 |
| DOI | 10.1088/0022-3700/15/1/007 |
| Journal | Journal of Physics B: Atomic and Molecular Physics |
| Issue Number | 1 |
| Volume Number | 15 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1982-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics B: Atomic and Molecular Physics Nuclear Physics Cross Section |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics |
