Model-QED operator for superheavy elements
| Autor: | Vladimir Shabaev, Ilya Tupitsyn, Vladimir Yerokhin, Dmitry Glazov, Vladimir Zaytsev, Aleksei Malyshev |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical Review A. 106 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.106.012806 |
| Popis: | The model-QED-operator approach [Phys. Rev. A 88, 012513 (2013)] to calculations of the radiative corrections to binding and transition energies in atomic systems is extended to the range of nuclear charges $110 \leqslant Z \leqslant 170$. The self-energy part of the model operator is represented by a nonlocal potential based on diagonal and off-diagonal matrix elements of the ab initio self-energy operator with the Dirac-Coulomb wave functions. The vacuum-polarization part consists of the Uehling contribution which is readily computed for an arbitrary nuclear-charge distribution and the Wichmann-Kroll contribution represented in terms of matrix elements similarly to the self-energy part. Performance of the method is studied by comparing the model-QED-operator predictions with the results of ab initio calculations. The model-QED operator can be conveniently incorporated in any numerical approach based on the Dirac-Coulomb-Breit Hamiltonian to account for the QED effects in a wide variety of superheavy elements. Comment: 14 pages, 2 figures, 15 tables |
| Databáze: | OpenAIRE |
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