Static electric dipole polarizability of lithium atom in Debye plasmas

doi:10.1088/1674-1056/21/12/123201

Abstract The static electric dipole polarizabilities of the ground state and n ≤ 3 excited states of lithium atom embedded in a weekly coupled plasma environment are investigated as a function of the plasma screening radium. The plasma screening of the Coulomb interaction is described by the Debye-Hückel potential and the interaction between the valence electron and the atomic core is described by a model potential. The electron energies and wave functions for both the bound and continuum states are calculated by solving the Schrödinger equation numerically using the symplectic integrator. The oscillator strengths, partial-wave, and total static dipole polarizabilities of the ground state and n ≤ 3 excited states of lithium atom are calculated. Comparison of present results with those of other authors, when available, is made. The results for the 2s ground state demonstrated that the oscillator strengths and the static dipole polatizabilities from np orbitals do not always increase or decrease with the plasma screening effect increasing, not like that for hydrogen-like ions, especially for 2s → 3p transition there is a zero value for both the oscillator strength and the static dipole polatizability for screening length D=10.3106a₀, which is associated with the Cooper minima.

Keywords: static electric dipole polarizability Debye plasmas lithium atom

Received: 18 June 2012
Revised: 16 August 2012
Accepted manuscript online:

PACS:	32.10.Dk	(Electric and magnetic moments, polarizabilities)
	32.80.Fb	(Photoionization of atoms and ions)
	52.20.-j	(Elementary processes in plasmas)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11005049, 10979007, and 10974021).

Corresponding Authors: Ning Li-Na
E-mail: cherrynln@163.com

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Ning Li-Na (宁丽娜), Qi Yue-Ying (祁月盈) Static electric dipole polarizability of lithium atom in Debye plasmas 2012 Chin. Phys. B 21 123201

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