| Zugriffsnummer | 53672 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Bound-Free and Free-Free Pair Production Channels in Forward Delbrück Scattering |
| Autor(in); Institution | |
| Quelle/Jahr | 21st International Conference on the Physics of Highly Charged Ions. Atoms: 13 (2025), 2, 1 - 5 |
| Availability | [online only] |
| ISSN | 2218-2004 (online) |
| DOI | |
| Verlag | Basel: MDPI |
| Freie Schlagworte | Delbrück Scattering ; QED theory ; X-ray scattering ; Pair production ; optical theorem ; quantum electrodynamics ; elastic scattering |
| Zusammenfassung | We present a theoretical study of forward-angle Delbrück scattering of light by the Coulomb field of a target nucleus. Special attention is paid to the Coulomb corrections, which take into account the interaction of the emerging virtual electron–positron pairs with the nucleus to higher orders of 𝛼𝑍. We compare the results from three different computation methods: the direct all-order evaluation of the Delbrück amplitude, the computation from the pair production cross section with the optical theorem and the low-energy limit. We find that the values obtained from the optical theorem are in very good agreement with the all-order calculations and can be used as benchmark data. Moreover, both methods agree with the low-energy limit for photon energies ω<<𝑚𝑒𝑐2 when correctly accounting for the bound-free pair production cross section in the optical theorem calculations, and the discrepancy found in the literature originates from neglecting this contribution. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Zeit und Frequenz |
| Innovationscluster | Quantentechnologie |
| Geschäftsfelder | Grundlagen der Metrologie |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderungsnummer: 546193616 |