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Extreme ultraviolet and soft x-ray spectral lines in Rb ⅩⅩⅨ

Chinese Physics B 2016年第3期25卷 134-144页

作者： Indu Khatri Arun Goyal Sunny Aggarwal A K Singh Man Mohan Department of Physics and Astrophysics University of DelhiDelhi 110007India Department of Physics D.D.U.CollegeUniversity of DelhiDelhi 110015India Department of Physics Shyamlal CollegeUniversity of DelhiDelhi 110032India

An extensive theoretical set of atomic data for Rb XXIX in a wide range with L-shell electron excitations to the M-shell has been reported. We have computed energy levels for the lowest 113 fine structure levels of Rb XXIX. The fully relativistic multiconfigurational Dirac-Fock method （MCDF） within the framework of Dirac-Coulomb Hamiltonian taking quantum electrodynamics （QED） and Breit corrections into account has been adopted for calculations. Radiative data are reported for electric dipole （El）, magnetic dipole （MI）, electric quadrupole （E2）, and magnetic quadrupole （M2） transitions from the ground level, although calculations have been performed for a much larger number of levels. To assess the accuracy of results, we performed analogous calculations using flexible atomic code （FAC）. Comparisons are made with existing available results and a good agreement has been achieved. Most of the wavelengths calculated lie in the soft x-ray （SXR） region. Lifetimes for all 113 levels have also been provided for the first time. Additionally, we have provided the spectra for allowed transitions from n = 2 to n = 3 within the x-ray region and also compared our SXR photon wavelengths with experimentally recognized wavelengths. We hope that our results will be beneficial in fusion plasma research and astrophysical applications.

关键词： energy levels wavelengths radiative rates spectral lines

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Intensities and shifts of Lyman and Balmer lines of hydrogen-like ions in high density plasmas

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Matter and Radiation at Extremes 2018年第6期3卷 300-311页

作者： G.P.Zhao L.Liu J.G.Wang R.K.Janev J.Yan Institute of Applied Physics and Computational Mathematics P.O.Box 8009-26Beijing 100088China Macedonian Academy of Sciences and Arts P.O.Box 4281000 SkopjeMacedonia

The spectral line intensities and line shifts of Lyman and Balmer series for transitions up to n=5 of hydrogen-like ion are studied in plasmas with densities and temperatures in the ranges n_(c)~10^(18)-10^(21)cm^(-3),T_(e)=0.3e1.2 eV *** screened potential used to describe the interaction between charged particles includes the electron exchange-correlation and finite-temperature gradient effects and is valid for both weakly and strongly coupled *** dependencies of alpha,beta and gamma line shifts of Lyman and Balmer series on plasma density(for fixed temperature)and temperature(for fixed density)are *** results for the H_(a)line shifts are compared with the available high-density experimental data.

关键词： Screened coulomb interaction Hydrogen-like ion spectral lines High density plasmas

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