Two-photon transitions in atomic inner shells: Relativistic and atomic-screening effects

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.1442· OSTI ID:6549165

Tong, X; Li, J ^[1]; Kissel, L; Pratt, R H ^[2]

---

1. Institute of Physics, Academia Sinica, Beijing (China)
2. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA (USA)

We present a relativistic self-consistent-field calculation of two-photon decay rates in atomic inner shells. By comparing our relativistic two-photon decay rates for Mo, Ag, and Xe with results for a series of hydrogenlike ions and existing nonrelativistic results, we identify and clarify the nature of the relativistic effects and atomic screening effects: (1) the relativistic effects reduce the two-photon decay rates compared with the nonrelativistic results; (2) screening reduces the atomic two-photon decay rates compared with the corresponding H-like ions. We also compare our results with recent experiments and with other theoretical calculations. Our results are in reasonable agreement with the experimental measurements, except for the 2{ital s}-1{ital s} transitions, and with other theoretical calculations, except for the {ital nd}-1{ital s} results of Mu and Crasemann (Phys. Rev. Lett. 57, 3039 (1986); Phys. Rev. A 38, 4585 (1988)).

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6549165
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 42:3; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
METALS
MOLYBDENUM
NONMETALS
RARE GASES
RELATIVISTIC RANGE
SCREENING
SELF-CONSISTENT FIELD
SILVER
TRANSITION ELEMENTS
XENON