Measurement of the He Ground State Lamb Shift via the Two-PhotonTransition
- 20 April 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 80 (16) , 3475-3478
- https://doi.org/10.1103/physrevlett.80.3475
Abstract
We have extended two-photon Doppler-free spectroscopy to the vacuum ultraviolet spectral region, to accurately measure the He transition at 120 nm. Our result is 4 984 872 315(48) MHz. This yields a ground state Lamb shift of 41 104(48) MHz, in fair agreement with theory and other experiments. This approach has the potential for significantly better accuracy once improvements in the laser and the wavelength metrology are implemented.
Keywords
This publication has 17 references indexed in Scilit:
- Phase-Coherent Measurement of the HydrogenTransition Frequency with an Optical Frequency Interval Divider ChainPhysical Review Letters, 1997
- Lamb shift measurement in theS ground state of heliumPhysical Review A, 1997
- Absolute Frequency Measurement of theTransitions in Hydrogen and Deuterium: New Determination of the Rydberg ConstantPhysical Review Letters, 1997
- Precision Measurements in Helium at 58 nm: Ground State Lamb Shift and theS-PTransition Isotope ShiftPhysical Review Letters, 1996
- High Resolution Spectroscopy of the Hydrogen Atom: Determination of theLamb ShiftPhysical Review Letters, 1996
- Theory of the energy levels and precise two-photon spectroscopy of atomic hydrogen and deuteriumJournal of Physics B: Atomic, Molecular and Optical Physics, 1996
- Phase dynamics in nanosecond pulsed dye laser amplificationJournal of the Optical Society of America B, 1994
- First laser excitation of the1S-2Presonance line at 58 nmPhysical Review Letters, 1993
- Optical heterodyne measurement of pulsed lasers: Toward high-precision pulsed spectroscopyPhysical Review A, 1992
- Ionization potentials and Lamb shifts of the ground states of 4 He and 3 HeProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958