Precision measurement of the 1s Lamb shift in hydrogenlike argon

Journal Article · Wed Jan 01 00:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.33.774· OSTI ID:6174839

Marmar, E S; Rice, J E; Kallne, K; Kallne, J; LaVilla, R E

Precision measurements of the absolute wavelengths of the Lyman- doublet (2p SP/sub 3/2,1/2/ 1s SS/sub 1/2/) in hydrogenlike argon (Ar X ), as well as those of some strong dielectronic satellites, are reported. The Alcator C tokamak plasma was seeded with trace amounts of argon and the emission spectra were taken with a high-resolution, crystal x-ray spectrometer. In situ wavelength calibration was achieved by utilizing the potassium K lines from a KCl fluorescence source. For the Ly 2 line, a precision of 11 ppm was achieved. Comparisons of these data with QED predicted wavelengths show good agreement, yielding a test of the 1s Lamb shift at the 3% level. The precision of these measurements was limited by uncertainties in the wavelength calibration, with the uncertainties due to the influence of unresolved satellites being of secondary importance.

• Research Organization: MIT Plasma Fusion Center, Cambridge, Massachusetts 02139
• OSTI ID: 6174839
• Journal Information: Phys. Rev. A; (United States), Vol. 33:1
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
LAMB SHIFT
LYMAN LINES
ACCURACY
ALCATOR DEVICE
QUANTUM ELECTRODYNAMICS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
ELECTRODYNAMICS
FIELD THEORIES
IONS
QUANTUM FIELD THEORY
SPECTRAL SHIFT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory