| Autor: |
C. Biedermann, S. B. Elston, R. T. Short, J. P. Gibbons, K. Kimura, L.R. Andersson, Jon C. Levin, H. Andersson, L. Liljeby, Henrik Cederquist, N. Keller, Ivan A. Sellin |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :74-77 |
| ISSN: |
0168-583X |
| Popis: |
We have measured state-resolved angular distributions of one- and two- electron capture in 32 to 800 eV Ar 6+ -Ar collisions. The experimental energy-gain spectra show that single-electron capture mainly populates the 5s, 5p and 4f levels. We observe detailed structures in the corresponding angular distributions, but a final interpretation has to await a quantitative analysis of the collision dynamics. We tentatively ascribe the main features in the angular distribution of true double-electron capture at Q 26 eV (4s4f and 4s5s) and Q 42 eV (3d4d) to processes involving two consecutive one-electron transitions. For the transfer ionization process, we measure a Q -value of ∼ 26 eV, which we assign to autoionizing 4s5s (or 4s4f) levels. The 4s5s, 4s4f, and 3d4d levels all reside above the first ionization limit of Ar 4+ but we find that the 3d4d level stabilizes through radiative decay. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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