MEASUREMENT OF THE HE GROUND-STATE LAMB SHIFT VIA THE 2-PHOTON 1(1)S-2(1)S TRANSITION

Authors
BERGESON SD BALAKRISHNAN A BALDWIN KGH LUCATORTO TB MARANGOS JP MCILRATH TJ OBRIAN TR ROLSTON SL SANSONETTI CJ WEN J WESTBROOK N CHENG CH EYLER EE
Citation
Sd. Bergeson et al., MEASUREMENT OF THE HE GROUND-STATE LAMB SHIFT VIA THE 2-PHOTON 1(1)S-2(1)S TRANSITION, Physical review letters, 80(16), 1998, pp. 3475-3478
Citations number
24
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
16
Year of publication
1998
Pages
3475 - 3478
Database
ISI
SICI code
0031-9007(1998)80:16<3475:MOTHGL>2.0.ZU;2-Y
Abstract
We have extended two-photon Doppler-free spectroscopy to the vacuum ul traviolet spectral region, to accurately measure the He 1 S-1-2 S-1 tr ansition at 120 nm. Our result is 4984872315(48) MHz. This yields a gr ound state Lamb shift of 41104(48) MHz, in fair agreement with theory and other experiments. This approach has the potential for significant ly better accuracy once improvements in the laser and the wavelength m etrology are implemented.