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Ab initio calculations of Ca III Stark broadening parameters,transition probabilities and radiative lifetimes
Alonso Medina, Aurelia and Colón Hernández, Cristobal
Ab initio calculations of Ca III Stark broadening parameters,transition probabilities and radiative lifetimes.
"Monthly Notices of the Royal Astronomical Society", v. 431
||Ab initio calculations of Ca III Stark broadening parameters,transition probabilities and radiative lifetimes
Alonso Medina, Aurelia
Colón Hernández, Cristobal
|Título de Revista/Publicación:
||Monthly Notices of the Royal Astronomical Society
||Atomic data, Atomic processes
||E.U.I.T. Industrial (UPM)
||Física Aplicada [hasta 2014]
|Creative Commons Licenses:
||Recognition - No derivative works - Non commercial
We have determined matrix elements for all experimental configurations of Ca III, including
the 3s3p63d configuration. These values have been obtained using intermediate coupling (IC).
For these IC calculations, we have used the standard method of least-squares fitting from
the experimental energy levels, using the computer code developed by Robert Cowan. In this
paper, using these matrix elements, we report the calculated values of the Ca III Stark widths
and shifts for 148 spectral lines, of 56 Ca III spectral line transition probabilities and of eight
radiative lifetimes of Ca III levels. The Stark widths and shifts, calculated using the Griem
semi-empirical approach, correspond to the spectral lines of Ca III and are presented for an
electron density of 1017 cm?3 and temperatures T = 1.0?10.0 (×104 K). The theoretical trends
of the Stark broadening parameter versus the temperature are presented for transitions that
are of astrophysical interest. There is good agreement between our calculations, for transition
probabilities and radiative lifetimes, and the experimental values presented in the literature.
We have not been able to find any values for the Stark parameters in the references.
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