Commun. Comput. Phys., 2 (2007), pp. 795-805.

A Numerical Study for Dielectronic Recombination Processes in He-Like Argon

Hong Zhang 1*, Yueming Li 1, Jun Yan 1, Jianguo Wang 1

1 The Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China.

Received 3 May 2006; Accepted (in revised version) 16 November 2006
Available online 15 February 2007


{\it Ab initio} calculations of dielectronic recombination (DR) processes from the ground state $1s^2$ of He-like argon ion through doubly excited states $1s2snl$, $1s2pnl$ ($n$=2 to 9) of Li-like argon ions are performed using the multi-configuration Hatree-Fock method with relativistic correction. The theoretical method and its corresponding computation will be outlined. For higher doubly excited states with $n>9$, the scaling law is used to extrapolate the Auger and radiative transition rates. The total and state-to-state cross sections with corresponding rate coefficients in the temperature from $10^2$ eV to $10^6$ eV are presented, as well as the DR strengths for all the separate resonances. Moreover, peculiarities of the DR from doubly excited $1s2s3l'$ configurations are analyzed and the contributions of two-electron-one-photo (TEOP) radiative transitions to the DR cross sections are also investigated, such as $1s2s^2\rightarrow 1s^22p$, due to the strong configuration interactions. Our theoretical results appear to be in excellent agreement with the previous and recent experimental measurements.

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PACS: 34.80.Lx
Key words: Multi-configuration Hatree-Fock method, dielectronic recombination, TEOP.

*Corresponding author.
Email: (H. Zhang), (Y. Li), (J. Yan), (J. Wang)

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