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

1998 ◽  
Vol 31 (14) ◽  
pp. 3181-3198 ◽  
Author(s):  
Andre Bürgers ◽  
Nicklas Brandefelt ◽  
Eva Lindroth
Keyword(s):  
Excited States ◽  
Doubly Excited States ◽  
Quantum Numbers ◽  
Doubly Excited

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

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.

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.

Excitation ofS1andS3Metastable Helium Atoms to Doubly Excited States

2009 ◽  
Vol 102 (15) ◽  
Author(s):  
M. Alagia ◽  
M. Coreno ◽  
H. Farrokhpour ◽  
P. Franceschi ◽  
A. Mihelič ◽  
...  
Keyword(s):  
Excited States ◽  
Helium Atoms ◽  
Doubly Excited States ◽  
Doubly Excited

Lasing of extreme ultraviolet light with nitrogen plasma in a recombining phase—Roles of doubly excited states

2012 ◽  
Vol 19 (6) ◽  
pp. 063302 ◽  
Author(s):  
Takuya Ozawa ◽  
Shuhei Yamamura ◽  
Nao Tatsumura ◽  
Kazuhiko Horioka ◽  
Tohru Kawamura
Keyword(s):  
Excited States ◽  
Ultraviolet Light ◽  
Extreme Ultraviolet ◽  
Nitrogen Plasma ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
Extreme Ultraviolet Light
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