Two-body effects in the decay rate of atomic levels

@article{Karshenboim1997TwobodyEI,
  title={Two-body effects in the decay rate of atomic levels},
  author={Savely G. Karshenboim},
  journal={Physical Review A},
  year={1997},
  volume={56},
  pages={4311-4313}
}
Recoil corrections to the atomic decay rate are considered in the order of Zm/M . The expressions are treated exactly without any expansion over Z alpha. The expressions obtained are valid both for muonic atoms (for which they contribute on the level of a few percent in high Z ions) and for electronic atoms. Explicit results for Lyman-alpha transitions for low-Z of the order (Zm/M)(Z alpha)^2 are also presented. 
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