Doubly-Excited States of Two-Electron Systems in Lorentzian Astrophysical Plasmas

2013 ◽  
Vol 54 (11) ◽  
pp. 1911-1919 ◽  
Author(s):  
Pinghui Jiang ◽  
Sabyasachi Kar ◽  
Y. Zhou
Keyword(s):  
Excited States ◽  
Electron Systems ◽  
Astrophysical Plasmas ◽  
Doubly Excited States ◽  
Doubly Excited

Time-dependent perturbation calculation for the doubly excited states in two-electron systems

1989 ◽  
Vol 136 (7-8) ◽  
pp. 423-427 ◽  
Author(s):  
D. Ray ◽  
B. Kundu ◽  
P.K. Mukjerjee ◽  
K. Ohtsuki ◽  
Kimio Ohno
Keyword(s):  
Excited States ◽  
Time Dependent ◽  
Electron Systems ◽  
Perturbation Calculation ◽  
Doubly Excited States ◽  
Doubly Excited

Z-DEPENDENCE OF THE ENERGY LEVELS AND AUTOIONIZATION PROBABILITIES FOR DOUBLY EXCITED STATES 2l 3l' OF THE TWO-ELECTRON SYSTEMS

1989 ◽  
Vol 50 (C1) ◽  
pp. C1-583-C1-588
Author(s):  
M. CORNILLE ◽  
J. DUBAU ◽  
F. BELY-DUBAU ◽  
P. FAUCHER ◽  
U. I. SAFRONOVA
Keyword(s):  
Excited States ◽  
Energy Levels ◽  
Electron Systems ◽  
Doubly Excited States ◽  
Doubly Excited

scholarly journals Resonances in Systems Involving Positrons

Atoms ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 20 ◽  
Author(s):  
Anand K. Bhatia
Keyword(s):  
Excited States ◽  
Cross Section ◽  
Incident Particle ◽  
Feshbach Resonances ◽  
Astrophysical Plasmas ◽  
Resonance Parameters ◽  
Doubly Excited States ◽  
Doubly Excited ◽  
The Cross ◽  
Shape Resonances

When an incident particle on a target gets attached to the target, the cross-section at that energy could be much larger compared to those at other energies. This is a short-lived state and decays by emitting an electron. Such states can also be formed by the absorption of a photon. Such states are below the higher thresholds and are called autoionization states, doubly excited states, or Feshbach resonances. There is also a possibility of such states to form above the thresholds. Then they are called shape resonances. Resonances are important in the diagnostic of solar and astrophysical plasmas. Some methods of calculating the resonance parameters are described and resonance parameters occurring in various systems are given.

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