Measurement of 1[ital s]2[ital s] [sup 3][ital S][sub 1]--1[ital s]2[ital p] [sup 3][ital P][sub 2,0] wavelengths in heliumlike silicon

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.4390· OSTI ID:7049517

Howie, D J.H.; Hallett, W A; Myers, E G; Dietrich, D D; Silver, J D ^[1]

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1. Clarendon Laboratory, University of Oxford, Oxford OX13PU (United Kingdom) Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States) High Temperature Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

We have measured the vacuum-ultraviolet 1[ital s]2[ital s] [sup 3][ital S][sub 1-]1[ital s]2[ital p] [sup 3][ital P][sub 2,0] transition wavelengths in heliumlike silicon by photographic spectroscopy of a beam-foil source. The results are 814.71[plus minus]0.02 A and 878.68[plus minus]0.03 A, respectively, and represent a sensitive test of present relativistic and quantum electrodynamic calculations. Comparisons are made between our results, previous measurements of these transitions, and the current theories. Good agreement is obtained, particularly with recent relativistic many-body perturbation calculations. A discussion of future measurements of this interval is also presented.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7049517
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:6; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXTREME ULTRAVIOLET RADIATION
FLUIDS
FREQUENCY MEASUREMENT
GASES
HELIUM
ION SPECTROSCOPY
MEV RANGE
NONMETALS
RADIATIONS
RARE GASES
SEMIMETALS
SILICON
SPECTRA
SPECTROSCOPY
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA