Relativistic calculation of the two-photon decay rate of highly excited ionic states

Citation data:

Physical Review A - Atomic, Molecular, and Optical Physics, ISSN: 1050-2947, Vol: 77, Issue: 4, Page: 42507-42507

Publication Year:
2008
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Citations 25
Citation Indexes 25
arXiv Id:
0807.0651
DOI:
10.1103/physreva.77.042507
Repository URL:
http://scholarsmine.mst.edu/phys_facwork/973; http://arxiv.org/abs/0807.0651
Author(s):
Jentschura, Ulrich D.; Surzhykov, Andrey S.
Publisher(s):
American Physical Society (APS)
Tags:
Physics and Astronomy; Electrodynamics; Excited States; Quantum Theory; Resonance; Neutral Hydrogen; Quantum Electrodynamics; Two Photon Processes; Electrodynamics; Excited States; Quantum Theory; Resonance; Neutral Hydrogen; Quantum Electrodynamics; Two Photon Processes; Physics; Physics - Atomic Physics
article description
Based on quantum electrodynamics, we reexamine the two-photon decay of one-electron atoms. Special attention is paid to the calculation of the (two-photon) total decay rates which can be viewed as the imaginary part of the two-loop self-energy. We argue that our approach can be easily applied to the cases with a virtual state having an intermediate energy between the initial and the final state of the decay process leading, thus, to the resonance peaks in the two-photon energy distribution. In order to illustrate our approach, we obtain fully relativistic results, resolved into electric and magnetic multipole components, for the two-photon decay rates of the 3 S1/2 →1 S1/2 transition in neutral hydrogen as well as in various hydrogenlike ions. © 2008 The American Physical Society.