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, 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.

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.

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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