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Relativistic photoionization of H-isoelectronic series including plasma shielding effects

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Abstract

With plasma shielding effects of the Debye–Hückel model, we investigate the relativistic photoionization processes of H, \({{\hbox {Nb}}}^{40+}\) and \({{\hbox {Pb}}}^{81+}\) plasmas in the H-isoelectronic series. The shielded nuclear potential of Yukawa type experienced by the electron is parameterized by Debye length D. To account for relativistic effects non-perturbatively, we solve the Dirac equation for the bound as well as continuum wavefunctions. Contributions from multipole fields are calculated for high incident photon energies, while the angular distribution and spin polarization parameters of photoelectrons are provided in the electric dipole approximation. Our results of photoionization cross sections for the H plasma agree with other available theoretical calculations. The interplay between the relativistic and plasma shielding effects on the photoionization parameters is also studied.

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Acknowledgements

The author Xugen Zheng would like to thank Long Jiang for his assistance at the preliminary stage of this study. The authors acknowledge the support by the National Natural Science Foundation of China under Grant Numbers 11474209 and 11474208.

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Authors and Affiliations

  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610064, Sichuan, China

    Xugen Zheng, Gang Jiang & Keh-Ning Huang

  2. Department of Physics, National Dong Hwa University, Shoufeng, 97401, Hualien, China

    Hsin-Chang Chi

  3. College of Physical Science and Technology, Sichuan University, Chengdu, 610064, Sichuan, China

    Shin-Ted Lin, Chenkai Qiao & Keh-Ning Huang

  4. Department of Physics, National Taiwan University, Taipei, 10617, China

    Keh-Ning Huang

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  1. Xugen Zheng
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  2. Hsin-Chang Chi
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  3. Shin-Ted Lin
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  4. Gang Jiang
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  5. Chenkai Qiao
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  6. Keh-Ning Huang
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Correspondence to Keh-Ning Huang.

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Zheng, X., Chi, HC., Lin, ST. et al. Relativistic photoionization of H-isoelectronic series including plasma shielding effects. Indian J Phys 93, 267–277 (2019). https://doi.org/10.1007/s12648-018-1283-4

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  • DOI: https://doi.org/10.1007/s12648-018-1283-4

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