A dense grid of reference iodine lines for optical frequency calibration in the range 595-655 nm

Citation
Sc. Xu et al., A dense grid of reference iodine lines for optical frequency calibration in the range 595-655 nm, J MOL SPECT, 201(2), 2000, pp. 256-266
Citations number
13
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF MOLECULAR SPECTROSCOPY
ISSN journal
00222852 → ACNP
Volume
201
Issue
2
Year of publication
2000
Pages
256 - 266
Database
ISI
SICI code
0022-2852(200006)201:2<256:ADGORI>2.0.ZU;2-N
Abstract
A dense grid of reference lines in the hyperfine structure of the B-X trans itions of molecular iodine (I-127(2)) is presented. Frequencies of 481 "t"- hyperfine components in 15 vibrational bands covering the wavelength range 595-655 nm were determined with an absolute accuracy of 1.0 MHz (1 sigma un certainty). Spectra were obtained by Doppler-free saturation spectroscopy u sing a cw ring-dye laser of 1-MHz bandwidth. Center-of-gravity frequencies of rovibronic lines, determined by correcting for the calculated hyperfine shift, are included separately in a least-squares parametrization for each band. From the obtained molecular constants a prediction is made for all t- hyperfine components of the 15 bands covering 595-655 nm. Hence a dense gri d of reference lines of 1 MHz (1 sigma) absolute accuracy is created, with a Line in each interval of 1 cm(-1) in the entire range. This spectral atla s of about 3400 lines may provide a useful calibration tool in many laborat ories. (C) 2000 Academic Press.