Spectroscopic Studies of Highly Ionized Atoms New Results for the Ne, Mg, Mn, Fe, Co, Ga and Ge Isoelectronic Sequences

Abstract

The electron structure of several highly charged ions, belonging to the Mg, Ne, Mn, Fe, Co, Ga and Ge isoelectronic sequences, has been experimentally studied by means of two techniques, beam-foil spectroscopy, BFS, and the spectroscopy of laser-produced plasmas, LPP. The investigations were carried out at Lund University, LU, in 1989-90 and at the China Institute of Atomic Energy, CIAE, Beijing, from 1990 on.



In Lund the spectra Br IX - Br XI (belonging to Co, Fe and Mn sequences, respectively) were studied by BFS, using the 3 MV Pelletron tandem accelerator. The LPP investigations, in which a 1.5 GW Nd(YAG) laser systen was utilized, dealt with highly charged ions belonging to the Ga and Ge isoelectronic sequences. Many previously unknown transitions were observed and new energy levels were established. The observations were corroborated by theoretical calculations with the relativistic Hartree-Fock code, HFR, by R.D. Cowan.



At CIAE a beamline for atomic physics experiments was designed and constructed in the 13 MV tandem accelerator laboratory. The instrumentation includes a high-resolution 2.2 m grazing incidence monochromator for the spectral region 10 - 1000 Å. This monochromator, which compares favorably with commercially available instruments, was designed and built in China.



Spectra of highly charged S, Ni, Cu, Ge and Br have already been recorded at CIAE. The thesis includes detailed reults for Ne-like Br XXVI and Mg-like Br XXIV. In both spectra about 20 previously unknown energy levels were established. Parallel with the experimenal work HFR calculations were performed. Theory and experiment are in very satisfactory agreement. Also, future atomic physics investigations at CIAE are briefly discussed in the thesis.

• author: Zeng, Xiantang
• supervisor: [unknown] [unknown]
• opponent: Professor Curtis, Larry J., University of Toledo, Toledo OH
• publishing date: 1999
• type: Thesis
• publication status: published
• subject: Subatomic Physics
• keywords: Emission Spectra, Highly charged Ions, Beam-Foil spectroscopy, Laser-Produced Plasmas, Atomic and molecular physics, Isoelectronic Sequences, Atom- och molekylärfysik, Fysicumarkivet A:1999:Zeng
• pages: 95 pages
• defense location: Lecture Hall B
• defense date: 1999-12-06 10:15:00
• external identifiers: other:LUNFD6/(NFFA-1027)/1-95(1999)
• ISBN: 91-628-3914-4
• language: English
• LU publication?: no
• additional info: Article: "A 2.2 Meter Grazing Incidence GIM-957 VUV to Soft X-ray Monochromator".Zeng et al.,Chinese J. Atom. Molec. Phys. Suppl. 7, 81 (1998).; Article: "Equilibrium charge State Distribution of 99 MeV Phosphorus Ions Behind a Gold Foil".Li Jingwen et al.,Chinese J. Atom. Molec. Phys.9, 2525 (1992).; Article: "Spectrum and Energy Levels of Mg-like Br XXIV".X.T. Zeng et al.,Physica Scripta, (in press).; Article: "Analysis of the 2p5 3s, 3p and 3d Configurations of Ne-like Br XXVI".C. Jupén et al.,Physica Scripta, (in press).; Article: "The 3d8 4s-3d8 4p Transitions in Br IX".X.T. Zeng et al.,Physica Scripta 42, 223 (1990).; Article: "Identification of the Transition Arrays 3d7 4s-3d7 4p in Br X and 3d6 4s-3d6 4p in Br XI".X.T. Zeng et al.,Physica Scripta 43, 166 (1991).; Article: "The 4s2 4p- 4s4p2 Transition Array and Energy Levels of the Ga-like Ions Ru XIV-In XIX".Ulf Litzén and Xiantang Zeng,Physica Scripta 43, 262 (1991).; Article: "The 4s2 4p2-4s4p3 Transition Array and Energy Levels of the Ge-like Ions Ru XIII-Cd XVII".Ulf Litzén and Xiantang Zeng,J. Phys. B: At. Mol. Opt. Phys. 24, L45 (1991).
• id: 158355fd-3a60-4a3e-b220-2414860f91f0 (old id 40070)
• date added to LUP: 2016-04-04 12:24:12
• date last changed: 2018-11-21 21:10:44