Nonthermal and screening effects on photoionizations in Lorentzian plasmas
- Title
- Nonthermal and screening effects on photoionizations in Lorentzian plasmas
- Author
- 신동수
- Issue Date
- 2009-05
- Publisher
- Institute of Physics Publishing
- Citation
- Plasma Physics and Controlled Fusion, v. 51, NO. 5, article no. 055007, Page. 1-9
- Abstract
- The nonthermal and plasma screening effects on the x-ray photoionization process are investigated in astrophysical Lorentzian plasmas. The screened atomic wave function and energy eigenvalue of the target ion in Lorentzian plasmas are obtained by the Rayleigh-Ritz variational method. The x-ray retardation and screened Coulomb corrections are considered to obtain a photoionization cross section as a function of the spectral index and plasma parameters. It is shown that the nonthermal character of the Lorentzian plasma suppresses the photoionization cross section. Hence, the photoionization cross sections in nonthermal plasmas are found to be always smaller than those in thermal plasmas. It is also shown that the plasma screening effect is more significant for small spectral indices. In addition, the nonthermal effect on the photoionization cross section is found to be decreased with an increase in the Debye length.
- URI
- https://iopscience.iop.org/article/10.1088/0741-3335/51/5/055007https://repository.hanyang.ac.kr/handle/20.500.11754/181918
- ISSN
- 0741-3335;1361-6587
- DOI
- 10.1088/0741-3335/51/5/055007
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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