Soft x-ray spectral analysis of samarium plasmas produced by solid-state laser pulses. (8th October 2018)

• Record Type: Journal Article
• Authors: Lokasani, Ragava; Sheil, John; Barte, Ellie Floyd; Hara, Hiroyuki; Tamura, Toshiki; Gisuji, Takuya; Higashiguchi, Takeshi; Suzuki, Chihiro; Dunne, Padraig; O'Sullivan, Gerry; Limpouch, Jiri
• Is Part Of: Journal of physics. Volume 51:Number 21(2018:Nov. 14)
• Publication Date: 2018-10-08
• Subjects: laser produced plasma -- EUV emission -- unresolved transition arrays -- samarium; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aae12d
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: XUV spectra of 150 ps laser-produced samarium (Sm) plasmas in the 1.8–10 nm wavelength region, where Δ n = 1, n = 4 − n = 5 and Δ n = 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 Sm 16+ to Sm 34+ . The results show that Δ n = 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 Δ n = 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 Sm 32+ .