| Zugriffsnummer | 45577 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Vacuum polarization and finite-nuclear-size effects in the two-photon decay of hydrogenlike ions |
| Autor(in); Institution |
Sommerfeldt, J.; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische Universität Braunschweig, Braunschweig, GERMANY
Müller, Robert A.; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische Universität Braunschweig, Braunschweig, GERMANY
Volotka, A. V.; Helmholtz Institute Jena, Jena, GERMANY
Fritzsche, S.; Helmholtz Institute Jena, Jena, GERMANY; Friedrich-Schiller-Universität Jena, Theoretisch-Physikalisches Institut, Jena, GERMANY
Surzhykov, Andrey; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische Universität Braunschweig, Braunschweig, GERMANY
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| Quelle/Jahr | Physical Review A: 102 (2020), 4, 1 - 9 |
| Artikelnummer | 042811 |
| ISSN | 2469-9926 (PRINT) ; 2469-9934 (ONLINE) |
| DOI | |
| Verlag | Woodbury, NY: American Physical Society (APS) |
| Freie Schlagworte | Two-photon decay ; Hydrogen-like ions ; finite nuclear size effect ; vacuum polarization |
| Zusammenfassung | The total two-photon decay rate of hydrogenlike ions is studied using relativistic quantum electrodynamics. In particular, we analyze how finite nuclear size and QED vacuum polarization corrections affect the decay rate. To calculate these corrections, a finite basis set method based on B splines is used for the generation of quasicomplete atomic spectra and, hence, of the relativistic Green's function. By making use of this B-spline approach, high precision calculations have been performed for the 2s1/2 → 1s1/2 + 2γ and 2p1/2 → 1s1/2 + 2γ decay of hydrogenlike ions along the entire isoelectronic sequence. The results of these calculations show that both QED and finite nuclear size effects are comparatively weak for the 2s1/2 → 1s1/2 + 2γ transition. In contrast, they are much more pronounced for the 2p1/2 → 1s1/2 + 2γ decay, where, for hydrogenlike uranium, the decay rate is reduced by 0.484% due to the finite nuclear size and enhanced by 0.239% if the vacuum polarization is taken into account. |
| Themenbereich der Metrologie | Zeit und Frequenz |