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.

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

Electron correlation properties of doubly excited states. Berylliumlike vs heliumlike systems

1991 ◽  
Vol 94 (7) ◽  
pp. 5011-5020 ◽  
Author(s):  
F. Martín ◽  
H. Bachau ◽  
P. Galan ◽  
A. Riera ◽  
M. Yáñez
Keyword(s):  
Excited States ◽  
Electron Correlation ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
Correlation Properties

Electron correlation in doubly excited states of helium and extensions to beryllium and magnesium

1984 ◽  
Vol 87 (3) ◽  
pp. 473-484 ◽  
Author(s):  
Vladimiro Mujica ◽  
Osvaldo Goscinski ◽  
Erland Sangfelt
Keyword(s):  
Excited States ◽  
Electron Correlation ◽  
Doubly Excited States ◽  
Doubly Excited

scholarly journals Electron correlation effects of the ThO and ThS molecules in the spinor basis. A relativistic coupled cluster study of ground and excited states properties

2018 ◽  
Vol 20 (36) ◽  
pp. 23424-23432 ◽  
Author(s):  
Paweł Tecmer ◽  
Cristina E. González-Espinoza
Keyword(s):  
Detailed Analysis ◽  
Excited States ◽  
Electron Correlation ◽  
Coupled Cluster ◽  
Correlation Effects ◽  
Spectroscopic Parameters ◽  
Electron Correlation Effects ◽  
Spinor Basis

Our study provides a reliable set of spectroscopic parameters and a detailed analysis of the electron correlation effects in the ThO and ThS molecules.

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.

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