Radiative and inner-shell dielectronic recombination in a highly charged barium ion
| Autor: | Endre Takacs, Daniel J. McLaughlin, Yukap Hahn, E. S. Meyer, John D. Gillaspy |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Physical Review A. 54:2040-2049 |
| ISSN: | 1094-1622 1050-2947 |
| Popis: | The direct radiative recombination (RR) to n=3, 4, and 5 levels and the resonant dielectronic recombination (DR) cross section involving 2p\ensuremath{\rightarrow}3d excitation of Sc-like barium ${\mathrm{Ba}}^{35+}$ and Ti-like barium ${\mathrm{Ba}}^{34+}$ are calculated and compared with a recent electron beam ion trap experiment at the National Institute of Standards and Technology. Assuming a fractional population of ${\mathrm{Ba}}^{35+}$ in the trap of about 30%, we obtain good agreement between theory and experiment for the cross section ratio \ensuremath{\sigma}(DR)/\ensuremath{\sigma}(RR)(n=4), as well as for \ensuremath{\sigma}(RR)(n=5)/\ensuremath{\sigma}(RR)(n=4). The result confirms again that the simple angular momentum averaged procedure can be effective in treating DR for heavy open-shell ions when the energy resolution is not high. A large, broad peak below 2 keV in the x-ray spectrum is being theoretically examined. \textcopyright{} 1996 The American Physical Society. |
| Databáze: | OpenAIRE |
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