LINE-SHAPE STUDIES IN HIGH-RESOLUTION STIMULATED RESONANCE RAMAN-SPECTROSCOPY AND APPLICATION TO ACCURATE DETERMINATIONS OF HYPERFINE SPLITTINGS IN I-2

Citation
Cj. Borde et al., LINE-SHAPE STUDIES IN HIGH-RESOLUTION STIMULATED RESONANCE RAMAN-SPECTROSCOPY AND APPLICATION TO ACCURATE DETERMINATIONS OF HYPERFINE SPLITTINGS IN I-2, Journal of the Optical Society of America. B, Optical physics, 13(9), 1996, pp. 1837-1848
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Optics
ISSN journal
0740-3224
Volume
13
Issue
9
Year of publication
1996
Pages
1837 - 1848
Database
ISI
SICI code
0740-3224(1996)13:9<1837:LSIHSR>2.0.ZU;2-#
Abstract
We studied stimulated resonance Raman transitions between hyperfine su blevels of the ground electronic state X(1) Sigma(0+g)(v = 0, J = 13) of I-2. Resonances narrower than 10 kHz (HWHM) were obtained. A detail ed theoretical and experimental analysis of the line shape is presente d. The pressure broadening of Raman resonances was found to be 7 +/- 1 kHz/mTorr. The role of the beam divergence was investigated and shown to yield only a small broadening but some asymmetry of the lines. In the transit-time limit the theory predicts that the slow molecules sho uld play a dominant role, as in saturation spectroscopy. Our experimen tal conditions are very close to that regime, and we discuss the impro vements that should be made in order to reach it in future experiments . Finally, six hyperfine splittings of the ground state of I-2 were de termined with a 0.2-kHz accuracy. (C) 1996 Optical Society of America.