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5–11 Jun 2022
McMaster University
America/Toronto timezone
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Relativistic corrections to helium two-photon decay rates

8 Jun 2022, 13:45
15m
MDCL 1008 (McMaster University)

MDCL 1008

McMaster University

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle) Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC) W2-10 DAMOPC I (DAMOPC) | DPAMPC I (DPAMPC)

Speaker

Aaron Bondy

Description

Two-photon transition rates are important in determining astrophysical quantities such as population balance in planetary nebulae. We recently calculated two-photon decay rates in heliumlike ions including the finite nuclear mass effects [1]. We have now perturbatively added relativistic corrections to these results, giving the most precise and accurate calculations to date. We first tested the relativistic corrections to dipole transition integrals for the equivalent one-electron case We derived (and will report on) one-electron Breit-Pauli operators that are equivalent to the corresponding Dirac operators by expanding in powers of the fine-structure constant $\alpha$. A continuous gauge parameter is used, and the operators are compared with the long-wavelength QED operators derived previously for few-electron atoms [2].

[1] A. T. Bondy, D. C. Morton, and G. W. F. Drake. 102, 052807 (2020).
[2] K. Pachucki, Phys. Rev. A 69, 052502 (2004).

Primary authors

Aaron Bondy Gordon Drake (University of Windsor)

Presentation materials

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