Two-photon transitions with cascades: Two-photon transition rates and two-photon level widths

被引：10
|
作者：
Zalialiutdinov, T. [1 ]
Solovyev, D. [1 ]
Labzowsky, L. [1 ,2 ]
Plunien, G. [3 ]
机构：
[1] St Petersburg State Univ, Dept Phys, St Petersburg 198504, Russia
[2] Petersburg Nucl Phys Inst, St Petersburg 188300, Russia
[3] Tech Univ Dresden, Inst Theoret Phys, D-10162 Dresden, Germany
来源：
PHYSICAL REVIEW A | 2014年 / 89卷 / 05期
关键词：
RADIATIVE DECAY-RATES; HELIUM-LIKE; 22S1/2; STATE; HYDROGEN; E1M1; RECOMBINATION; LIFETIME;
D O I：
10.1103/PhysRevA.89.052502
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An ambiguity of the separation of cascades from "pure" two-photon decay is confirmed with accurate numerical calculations in a gauge-invariant way. Adirect evaluation of the two-photon decay width of excited states in H-like ions via the imaginary part of two-loop self-energy is presented. We demonstrate that there is a fundamental difference between the level width and the transition probability in the presence of cascades. The two-photon widths are shown to be different from the two-photon decay rates for the transitions including cascades.
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收藏
页数：15
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