High‐lying core‐excited quartet states in Li‐like N4+ and F6+ ions

Lin, Zhiping; Chen, Feng; Gou, Bing Cong

doi:10.1002/qua.22470

Int J of Quantum Chemistry

2009

DOI: 10.1002/qua.22470

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High‐lying core‐excited quartet states in Li‐like N⁴⁺ and F⁶⁺ ions

Zhiping Lin

Feng Chen

Bing Cong Gou

Abstract: ABSTRACT:The variational method with mutilconfiguration interaction wave function is used to obtain the energies, fine structures, and hyperfine structures of highlying core-excited quartet states 1s2lnl'and F 6þ ions, including the mass polarization and relativistic corrections. Restricted variational method is carried out to extrapolate a better energy. The oscillator strengths, lifetime, wavelengths, fine structure, and hyperfine structure for this system are also investigated to compare with other theoreti… Show more

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High precision calculations of Fermi contact term for lithium-like ions

Wei¹,

Sun²,

Wang³

et al. 2022

Acta Phys. Sin.

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The Fermi contact term has a close relationship with the atomic hyperfine constants. It often dominates the hyperfine splittings. The quality of the wave function near the origin and the correlation effect between electrons are two main factors which affect the numerical accuracy of the Fermi contact term. It is not an easy task to compute the Fermi contact term to high precision for a general atom. In the present paper, the Schrödinger equation of the , 1s2s3s4S、1s2s3s4S and 1s2s2p4P states of lithium atom and lithium-like ions (Z=4-10) are solved using Rayleigh-Ritz variational method in Hylleraas coordinates. The variational energies converge to an accuracy of 10-13. Then the Fermi contact terms for these states are calculated based on the high precision variation wave functions. In particular, the Drachman global method are resorted in order to improve the convergence of the Fermi contact term. The effect of finite nuclear mass on Fermi contact term, i.e., the first-order mass polarization coefficients are also calculated. The Fermi contact terms converge to an accuracy of 10-10, which are the most accurate results at present. Our results can be used as a reference for other theoretical methods or relevant experimental studies.

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High precision calculations of Fermi contact term for lithium-like ions

Wei¹,

Sun²,

Wang³

et al. 2022

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

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High‐lying core‐excited quartet states in Li‐like N⁴⁺ and F⁶⁺ ions

Cited by 1 publication

References 24 publications

High precision calculations of Fermi contact term for lithium-like ions

High precision calculations of Fermi contact term for lithium-like ions

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