Angular correlations in the two-photon decay of heliumlike heavy ions

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.042510· OSTI ID:21408599

Surzhykov, A; Fratini, F ^[1]; Volotka, A ^[2]; Santos, J P ^[3]; Indelicato, P ^[4]; Plunien, G ^[2]; Stoehlker, Th ^[1]; Fritzsche, S ^[5]

---

1. Physikalisches Institut, Universitaet Heidelberg, D-69120 Heidelberg (Germany)
2. Institut fuer Theoretische Physik, Technische Universitaet Dresden, D-01062 Dresden (Germany)
3. Centro de Fisica Atomica, Departamento de Fisica, Faculdade de Ciencias e Tecnologia, FCT, Universidade Nova de Lisboa, P-2829-516 Caparica (Portugal)
4. Laboratoire Kastler Brossel, Ecole Normale Superieure, CNRS, Universite P. et M. Curie - Paris 6, Case 74, 4 place Jussieu, F-75252 Paris Cedex 05 (France)
5. GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany)

The two-photon decay of heavy, helium-like ions is investigated based on second-order perturbation theory and Dirac's relativistic equation. Special attention has been paid to the angular emission of the two photons (i.e., how the angular correlation function depends on the shell structure of the ions in their initial and final states). Moreover, the effects from the (electric and magnetic) nondipole terms in the expansion of the electron-photon interaction are discussed. Detailed calculations have been carried out for the two-photon decay of the 1s2s {sup 1}S{sub 0}, 1s2s {sup 3}S{sub 1}, and 1s2p {sup 3}P{sub 0} states of helium-like Xe{sup 52+}, Au{sup 77+}, and U{sup 90+} ions.

• OSTI ID: 21408599
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR CORRELATION
BOSONS
CHARGED PARTICLES
CORRELATIONS
DECAY
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
EQUATIONS
FLUIDS
GASES
HEAVY IONS
HELIUM
INTERACTIONS
IONS
MASSLESS PARTICLES
NONMETALS
PARTICLE INTERACTIONS
PERTURBATION THEORY
PHOTON-ELECTRON INTERACTIONS
PHOTON-LEPTON INTERACTIONS
PHOTONS
RARE GASES
RELATIVISTIC RANGE