# Radiative Corrections to One-Photon Decays of Hydrogenic Ions

Source: [Radiative Corrections to One-Photon Decays of Hydrogenic Ions](<https://www.sota2.com/research/paper/68fa263d2c2a3760193b807a>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T11:14:47.912Z

Authors: J. Sapirstein, K. Pachucki, K.T. Cheng

Published: 2003-11-11T03:18:01.000Z

## Abstract

Radiative corrections to the decay rate of n=2 states of hydrogenic ions are calculated. The transitions considered are the M1 decay of the 2s state to the ground state and the E1(M2) decays of the $2p\_{1/2}$ and $2p\_{3/2}$ states to the ground state. The radiative corrections start in order $\\alpha (Z \\alpha)^2$, but the method used sums all orders of $Z\\alpha$. The leading $\\alpha (Z\\alpha)^2$ correction for the E1 decays is calculated and compared with the exact result. The extension of the calculational method to parity nonconserving transitions in neutral atoms is discussed.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ph/0311134>)

[PDF](<https://arxiv.org/pdf/hep-ph/0311134.pdf>)