Negative-continuum effects on the two-photon decay rates of hydrogenlike ions

Andrey Surzhykov, José Paulo Santos, Pedro Amaro, and Paul Indelicato
Phys. Rev. A 80, 052511 – Published 30 November 2009

Abstract

Two-photon decay of hydrogenlike ions is studied within the framework of second-order perturbation theory, based on the relativistic Dirac’s equation. Special attention is paid to the effects arising from the summation over the negative-energy (intermediate virtual) states that occur in such a framework. In order to investigate the role of these states, detailed calculations have been carried out for the 2s1/21s1/2 and 2p1/21s1/2 transitions in neutral hydrogen H as well as for hydrogenlike xenon Xe53+ and uranium U91+ ions. We found that for a correct evaluation of the total and energy-differential decay rates, summation over the negative-energy part of Dirac’s spectrum should be properly taken into account both for high-Z and low-Z atomic systems.

  • Figure
  • Figure
  • Figure
  • Received 16 August 2009

DOI:https://doi.org/10.1103/PhysRevA.80.052511

©2009 American Physical Society

Authors & Affiliations

Andrey Surzhykov1,2, José Paulo Santos3, Pedro Amaro3,4, and Paul Indelicato4

  • 1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany
  • 2GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany
  • 3Centro de Física Atómica, CFA, Departamento de Física, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
  • 4Laboratoire Kastler Brossel, École Normale Supérieure, CNRS, Université P. et M. Curie—Paris 6, Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 80, Iss. 5 — November 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×