Photoionization of the 3s23p4 3P and the 3s23p4 1D, 1S states of sulfur: Experiment and theory

被引：13
|
作者：
Barthel, Mathias [1 ]
Flesch, Roman [1 ]
Ruehl, Eckart [1 ]
McLaughlin, Brendan M. [2 ,3 ]
机构：
[1] Free Univ Berlin, D-14195 Berlin, Germany
[2] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim, North Ireland
[3] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138 USA
来源：
PHYSICAL REVIEW A | 2015年 / 91卷 / 01期
基金：
美国国家科学基金会;
关键词：
CROSS-SECTION; ENERGY-LEVELS; 193; NM; ELECTRON-SCATTERING; ABSORPTION-SPECTRUM; MASS-SPECTROMETER; ATOMIC SULFUR; S-I; ULTRAVIOLET; CS2;
D O I：
10.1103/PhysRevA.91.013406
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Photoionization of neutral atomic sulfur in the ground and metastable states was studied experimentally at a photon energy resolution of 44 meV (full width at half maximum). Relative cross section measurements were recorded by using tunable vacuum ultraviolet radiation in the energy range 9-30 eV obtained from a laser-produced plasma and the atomic species were generated by photolysis of molecular precursors. Photoionization of this atom is characterized by multiple Rydberg series of autoionizing resonances superimposed on a direct photoionization continuum. A wealth of resonance features observed in the experimental spectra are spectroscopically assigned and their energies and quantum defects tabulated. The cross section measurements are comparedwith state-of-the-art theoretical cross section calculations obtained from the Dirac Coulomb R-matrix method. Resonance series in the spectra are identified and compared, indicating similar features in both the theoretical and experimental spectra.
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页数：17
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