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

2003 ◽  
Vol 81 (12) ◽  
pp. 1419-1425 ◽  
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 Rayleigh–Ritz 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

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

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.

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

Open Physics ◽  
2005 ◽  
Vol 3 (3) ◽  
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.

Energies and Auger widths of the high-lying double-excited states for Be-like neon

2011 ◽  
Vol 89 (6) ◽  
pp. 697-702 ◽  
Author(s):  
Lin Zhuo ◽  
Bing-Cong Gou ◽  
Feng Wang
Keyword(s):  
Saddle Point ◽  
Excited States ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Oscillator Strengths ◽  
Doubly Excited States ◽  
Rotation Method ◽  
Resolution Electron ◽  
Doubly Excited ◽  
Theoretical Results

Energies and Auger widths of high-lying doubly-excited states 1s23lnl′ (n = 3–6) for Be-like neon are calculated using a saddle-point variational method and saddle-point complex-rotation method. The relativistic corrections and mass polarization are obtained with first-order perturbation theory. The configuration structure of the high-lying doubly-excited series is checked by relativistic perturbation corrections. The oscillator strengths and radiative transition probabilities are also calculated. Our results of energies and Auger widths are compared with the available theoretical results in the literature. Auger channel energies are compared with those from high-resolution electron spectroscopy. Excellent agreement is obtained in each state.

OBSERVATION OF CIRCULAR–METASTABLE DOUBLY EXCITED STATES OF BARIUM

1991 ◽  
Vol 05 (18) ◽  
pp. 1199-1202 ◽  
Author(s):  
L. CHEN ◽  
T. BOLZINGER ◽  
M. CHERET ◽  
F. ROUSSEL ◽  
G. SPIESS ◽  
...  
Keyword(s):  
Fine Structure ◽  
Excited States ◽  
Rydberg State ◽  
The Other ◽  
Metastable Level ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
Valence Electrons

We report the observation of unusual doubly excited states of barium: Ba (5dj, 21c). One of the valence electrons of Ba is prepared in an oriented circular Rydberg state (n = 21, l = m = 20, denoted 21c) by the adiabatic crossed-fields method. The other electron is excited to a 6pj state which decays radiatively to a 5dj metastable level. The measured autoionization lifetime of Ba (5d5/2, 21c) is T ~ 1 μ s , whereas for Ba (5d3/2, 21c), τ is estimated to be longer than 400 μs. This very large difference of lifetimes between the fine-structure states of the inner electron has been analysed.

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

2004 ◽  
Vol 18 (17n19) ◽  
pp. 2590-2594
Author(s):  
BINGCONG GOU ◽  
YIDONG LIU ◽  
FENG WANG
Keyword(s):  
Excited States ◽  
Potential Method ◽  
Model Potential ◽  
Interaction Method ◽  
Configuration Interaction Method ◽  
Doubly Excited States ◽  
Quantum Numbers ◽  
Doubly Excited ◽  
Core Electrons ◽  
Electron Correlation Effects

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.

scholarly journals FINE STRUCTURE OF THE 1s2s2p 4P0 AND 1s2p2 4P DOUBLY EXCITED STATES OF LITHIUMLIKE Si XII

1988 ◽  
Vol 49 (C1) ◽  
pp. C1-111-C1-114
Author(s):  
J. P. BUCHET ◽  
M. C. BUCHET-POULIZAC ◽  
A. DENIS ◽  
J. DÉSESQUELLES ◽  
M. DRUETTA ◽  
...  
Keyword(s):  
Fine Structure ◽  
Excited States ◽  
Doubly Excited States ◽  
Doubly Excited

ENERGY, OSCILLATOR STRENGTH AND HYPERFINE STRUCTURE OF THE LOW-LYING EXCITED STATES FOR Be-LIKE SYSTEM

2003 ◽  
Vol 14 (05) ◽  
pp. 549-560 ◽  
Author(s):  
FEI WANG ◽  
BINGCONG GOU ◽  
XIAOLI WU ◽  
LIHONG HAN
Keyword(s):  
Experimental Data ◽  
Wave Function ◽  
Variational Method ◽  
Hyperfine Structure ◽  
Oscillator Strength ◽  
Excited States ◽  
Oscillator Strengths ◽  
Transition Rates ◽  
Isoelectronic Sequence ◽  
Relativistic Corrections

The Rayleigh–Ritz variational method is carried out with a multiconfiguration-interaction wave function and restricted variational method to obtain the relativistic energies of the 1s22s2p 1Po , 1s22s2p 3Po , and 1s22p23P states for the beryllium-like isoelectronic sequence (Z=4–10), including the mass polarization and relativistic corrections. The oscillator strengths and transition rates are also calculated. The results are compared with other theoretical and experimental data in the literature. The hyperfine structure of the low-lying excited states for this system is also explored.

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