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Wigner–Eisenbud–Smith photoionization time delay due to autoioinization resonances

Journal Article · · Journal of Physics. B, Atomic, Molecular and Optical Physics
 [1];  [2];  [2];  [3];  [4];  [5];
  1. Indian Inst. of Technology (IIT), Tirupati (India); Indian Institute of Science Education and Research, Tirupati (India); Georgia State University
  2. Indian Institute of Technology Mandi, Kamand (India)
  3. Indian Institute of Technology Madras, Chennai (India)
  4. Georgia State University, Atlanta, GA (United States)
  5. University of North Alabama, Florence, AL (United States)
We report an empiric ansatz for the complex photoionization amplitude and Wigner-Eisenbud-Smith time delay in the vicinity of a Fano autoionization resonance are proposed to evaluate and interpret the time delay in the resonant region. The utility of this expression is evaluated in comparison with accurate numerical calculations employing the ab initio relativistic random phase approximation and relativistic multichannel quantum defect theory. The indisputably good agreement between corresponding results of the proposed model and results produced by the ab initio theories proves the usability of the model. In addition, the phenomenology of the time delay in the vicinity of multichannel autoionizing resonances is detailed.
Research Organization:
Georgia State University, Atlanta, GA (United States)
Sponsoring Organization:
Government of India; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-03ER15428
OSTI ID:
1540386
Alternate ID(s):
OSTI ID: 22981319
Journal Information:
Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Journal Issue: 6 Vol. 51; ISSN 0953-4075
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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