Soft x-ray spectral analysis of samarium plasmas produced by solid-state laser pulses
| Autor: | John Sheil, Takeshi Higashiguchi, Ellie Floyd Barte, Chihiro Suzuki, Jiri Limpouch, Gerry O'Sullivan, Padraig Dunne, Toshiki Tamura, Hiroyuki Hara, Ragava Lokasani, Takuya Gisuji |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
chemistry.chemical_element Plasma Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Spectral line Ion 010309 optics Samarium Wavelength chemistry Solid-state laser Ab initio quantum chemistry methods Extreme ultraviolet 0103 physical sciences Atomic physics 010306 general physics |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 51:215001 |
| ISSN: | 1361-6455 0953-4075 |
| Popis: | XUV spectra of 150 ps laser-produced samarium (Sm) plasmas in the 1.8–10 nm wavelength region, where Δn = 1, n = 4 − n = 5 and Δn = 0, n = 4 − n = 4 transitions dominate the observed emission, were investigated experimentally and theoretically. Ab initio calculations using the flexible atomic code, as well as consideration of isoelectronic trends, are all employed to identify a number of new features in spectra from Sm16+ to Sm34+. The results show that Δn = 0, n = 4 − n = 4 emission from highly charged ions merge to form an intense unresolved transition arrays in the 7.5 nm region and Δn = 1, n = 4 − n = 5 resonance transitions contribute in the 3–7 nm region of the Sm spectrum. In addition, a number of strong individual lines at shorter wavelengths are seen to arise from Cu- and Zn-like ions and a number of new assignments are made for Zn-like Sm32+. |
| Databáze: | OpenAIRE |
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