Relativistic effects in the photoionization of hydrogen-like ions with screened Coulomb interaction

Journal Article · Sun Jun 15 04:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4882244· OSTI ID:22304243

Xie, L. Y. ^[1]; Wang, J. G. ^[2]; Janev, R. K. ^[3]

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1. Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070 (China)
2. Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-26, Beijing 100088 (China)
3. Macedonian Academy of Sciences and Arts, P.O. Box, 428, 1000 Skopje (Macedonia, The Former Yugoslav Republic of)

The relativistic effects in the photoionization of hydrogen-like ion with screened Coulomb interaction of Yukawa type are studied for a broad range of screening lengths and photoelectron energies. The bound and continuum wave functions have been determined by solving the Dirac equation. The study is focused on the relativistic effects manifested in the characteristic features of photoionization cross section for electric dipole nl→ε,l±1 transitions: shape resonances, Cooper minima and cross section enhancements due to near-zero-energy states. It is shown that the main source of relativistic effects in these cross section features is the fine-structure splitting of bound state energy levels. The relativistic effects are studied in the photoionization of Fe{sup 25+} ion, as an example.

• OSTI ID: 22304243
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 21; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CROSS SECTIONS
DIRAC EQUATION
ELECTRIC DIPOLES
ENERGY LEVELS
FINE STRUCTURE
HYDROGEN
IONS
PHOTOIONIZATION
RELATIVISTIC RANGE
WAVE FUNCTIONS