https://doi.org/10.1140/epjp/s13360-023-04751-2
Regular Article
Relativistic atomic structure calculations, plasma and thermodynamic parameters for Ca X
1
School of Physical Sciences, Jawaharlal Nehru University, 110067, New Delhi, India
2
Department of Physics, Deen Dayal Upadhyaya College, University of Delhi, 110078, New Delhi, Delhi, India
3
Department of Physics and Astrophysics, University of Delhi, 110007, New Delhi, Delhi, India
4
Department of Physics, Ramjas College, University of Delhi, 110007, New Delhi, Delhi, India
Received:
26
April
2023
Accepted:
27
November
2023
Published online:
27
December
2023
Excitation energies, lifetimes and radiative data including line strengths, oscillator strengths, transition wavelengths and transition probabilities have been reported for electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2) and magnetic quadrupole (M2) transitions for Na-like Ca X ion. These extensive calculations for 1s22s22p6nl configurations (n = 1 to 7 and l = 0 to 4) of Na like Ca X have been made using multi-configuration Dirac–Fock (MCDF) method. The effect of Breit-interaction and quantum electrodynamics (QED) on energy levels has also been discussed in graphical form. Shift in energy levels due to correlation effects, namely core-valence correlation and valence-valence correlation has also been reported. Further, similar calculations have also been made using the configuration interaction technique (CIV3) and relativistic configuration interaction (RCI) technique to ensure the accuracy of our results. Our calculated results are in good agreement with the available experimental and theoretical data. Plasma parameters like electron density, plasma frequency, coupling parameter and skin depth for the spectral lines 1s22s22p63s 2S1/2 –1s22s22p63p 
(1–3) and 1s22s22p63s 2S1/2–1s22s22p63p 
(1–2) have also been studied for hot dense plasma. We have also reported the line intensity ratio for the spectral lines 1–3 and 1–2. The influence of plasma temperature on the relative population for 1st 2 excited states, partition function and thermodynamic parameters have also been studied. The present results will be helpful in astrophysical plasmas, modelling and characterization of hot dense plasma.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
