THE FINE-STRUCTURE CONSTANT-ALPHA - LASER SPECTROSCOPY OF HELIUM AND ELECTROMAGNETICALLY INDUCED TRANSPARENCY

Authors
INGUSCIO M GIUSFREDI G PAVONE FS PREVEDELLI M
Citation
M. Inguscio et al., THE FINE-STRUCTURE CONSTANT-ALPHA - LASER SPECTROSCOPY OF HELIUM AND ELECTROMAGNETICALLY INDUCED TRANSPARENCY, Physica scripta. T, T70, 1997, pp. 42-47
Citations number
25
Categorie Soggetti
Physics
Journal title
Physica scripta. T → ACNP
ISSN journal
02811847
Volume
T70
Year of publication
1997
Pages
42 - 47
Database
ISI
SICI code
0281-1847(1997)T70:<42:TFC-LS>2.0.ZU;2-N
Abstract
Spectroscopy of helium is discussed in the context of methods to deter mine the fine structure constant a. Resonances corresponding to the fi ne structure separation are observed in the coherent excitation of a H e-4 metastable beam by two laser fields. A quantitative analysis of th e Lineshapes is performed for the three level model (''V'' scheme). A comparison with similar Doppler free line-center determinations from s aturation spectroscopy is discussed. This work provides a modern demon stration in the field of coherent phenomena pioneered by George Series .