ELECTRON CORRELATION EFFECTS FOR DOUBLY-EXCITED STATES OF Be-LIKE Ar14+ ION

The energies, radiative and Auger rates of the doubly excited states of Be-like Ar 14+ ion are studied by using the multi-configuration-interaction method and model potential method. The doubly excited states of Be-like Ar 14+ are labeled by the quantum numbers K, T and A to show the systematic regularity. The results show that the spectroscopy of Be-like ions is different from that of He-like ions because of the polarization and core penetration effects from the 1s2 core electrons.

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Energy, fine structure, and transition rate of the doubly excited 3Pe and 3De states for helium

Canadian Journal of Physics ◽

10.1139/p03-107 ◽

2003 ◽

Vol 81 (12) ◽

pp. 1419-1425 ◽

Cited By ~ 1

Author(s):

X -L Wu ◽

B -C Gou ◽

F Wang

Keyword(s):

Fine Structure ◽

Variational Method ◽

Excited States ◽

Transition Rate ◽

Oscillator Strengths ◽

Transition Rates ◽

Rydberg Series ◽

Doubly Excited States ◽

Quantum Numbers ◽

Doubly Excited

Energies and fine-structure corrections for the doubly excited 3Pe and 3De states of the helium atom are calculated using the RayleighRitz variational method and the saddle-point variational method with a multiconfiguration-interaction function. The relativistic and mass polarization corrections are included. The oscillator strengths, transition rates, and wavelengths are also calculated. The doubly excited states are grouped into Rydberg series labeled by the quantum numbers K, T, and A to display the systematic regularity along the series. The results are compared with the theoretical and experimental data in the literature. PACS Nos.: 31.15.Pf, 31.25.Jf, 32.70.Cs

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The interelectronic angle in doubly excited states and the quality of approximate quantum numbers

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/31/14/016 ◽

1998 ◽

Vol 31 (14) ◽

pp. 3181-3198 ◽

Cited By ~ 10

Author(s):

Andre Bürgers ◽

Nicklas Brandefelt ◽

Eva Lindroth

Keyword(s):

Excited States ◽

Doubly Excited States ◽

Quantum Numbers ◽

Doubly Excited

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Fine Structure of the 1s2s2p 4P0 and 1s2p2 4P Doubly Excited States of Lithiumlike Si XII

International Astronomical Union Colloquium ◽

10.1017/s0252921100107547 ◽

1988 ◽

Vol 102 ◽

pp. 111-114

Author(s):

J.P. Buchet ◽

M.C. Buchet-Poulizac ◽

A. Denis ◽

J. Désesquelles ◽

M. Druetta ◽

...

Keyword(s):

Fine Structure ◽

Excited States ◽

Electron Correlation ◽

Ion Beam ◽

Correlation Effects ◽

Doubly Excited States ◽

Doubly Excited ◽

Electron Correlation Effects ◽

Far Ultraviolet ◽

Fast Ion

AbstractThe ls2s2p4P0- ls2p24P transitions of Si XII have been investigated using fast ion beam spectroscopy in the far ultraviolet. The results for fine structure intervals and term separation represent the highest Z test of electron correlation effects and relativistic contributions in doubly excited states of lithiumlike ions.

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High-lying doubly excited states of He and H−: electron correlations and classification schemes

Open Physics ◽

10.2478/bf02475641 ◽

2005 ◽

Vol 3 (3) ◽

Cited By ~ 2

Author(s):

Spyros Themelis

Keyword(s):

Excited States ◽

Wave Functions ◽

Electron Correlations ◽

Classification Schemes ◽

Doubly Excited States ◽

Quantum Numbers ◽

Doubly Excited

AbstractHigh-lying doubly excited states of He and H− are studied and energies and intrinsic characteristics of their wave-functions are reported. Results for energies of 3Po and 1D doubly excited states associated with the hydrogenic thresholds up to N = 20 are presented and compared to available data from the literature. The classification of these doubly excited states by approximate quantum numbers is reexamined.

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Model potential calculations and spectroscopic observations of some doubly excited states in beryllium-like Ne VII

Journal of Physics B Atomic and Molecular Physics ◽

10.1088/0022-3700/20/19/002 ◽

1987 ◽

Vol 20 (19) ◽

pp. L623-L626 ◽

Cited By ~ 6

Author(s):

M Cornille ◽

J Dubau ◽

F Bely-Dubau ◽

S Bliman ◽

C -A Laberge ◽

...

Keyword(s):

Excited States ◽

Model Potential ◽

Spectroscopic Observations ◽

Doubly Excited States ◽

Doubly Excited

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Doubly-Excited States of Beryllium-Like Ions with Screened Coulomb Potentials

Atoms ◽

10.3390/atoms6030041 ◽

2018 ◽

Vol 6 (3) ◽

pp. 41

Author(s):

Arijit Ghoshal ◽

Yew Ho

Keyword(s):

Excited States ◽

Coulomb Potential ◽

Model Potential ◽

Interaction Potentials ◽

Doubly Excited States ◽

Doubly Excited ◽

Screened Coulomb Potentials ◽

Screened Coulomb Potential ◽

Three Body ◽

Coulomb Potentials

The screening effects of the interaction potentials on the lowest 1S doubly-excited states of beryllium-like ions were investigated by calculating the density of resonance states within the framework of the stabilization method. Two types of screened interaction potentials, namely static screened Coulomb potential and exponential cosine screened Coulomb potential, were taken into consideration. A model potential was used to describe the interaction between the core and outer electrons, and the Be-like ions were treated as being effectively three-body systems. Calculations were performed for Be and B+. It was possible to calculate the energy and width of one doubly-excited state of Be and four doubly-excited states of B+ lying above the 1s22p threshold. Significant changes were found to exist in the behaviour of the width with varying screening parameters. To the best of our knowledge, such an investigation on the doubly-excited states of Be-like ions under screened environments is the first reported calculation of this type in the literature.

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