FOURIER TRANSFORM EMISSION SPECTROSCOPY OF THE E$^{2}\Pi$--X$^{2}\Sigma^{+}$ TRANSITION OF CaH AND CaD
Loading...
Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The emission spectra of CaH and CaD have been recorded at high resolution using a Fourier transform spectrometer and bands belonging to the E$^{2}\Pi$--X$^{2}\Sigma^{+}$ transition have been measured in the 20100--20700 cm$^{-1}$ region. A rotational analysis of 0--0 and 1--1 bands of both the isotopologues has been carried out. The present measurements have been combined with the previously available pure rotation and vibration-rotation data to provide improved spectroscopic constants for the {E}$^{2}\Pi$ state. The constants $\Delta G_{1/2}=1199.8810(32)$ cm$^{-1}$, B$_e$=4.344659(45) cm$^{-1}$, $\alpha_{e}$=0.121869(88) cm$^{-1}$, r$_e$=1.986718 {\AA} for CaH, and $\Delta G_{1/2}$=868.7438(46) cm$^{-1}$, B$_e$=2.212496(51) cm$^{-1}$, $\alpha _e$=0.036509(97) cm$^{-1}$, r$_e$=1.993396(23) {\AA} for CaD have been determined. An analysis of the corresponding transitions of SrH and SrD in the 18600--19300 cm$^{-1}$ region will also be reported.
Description
Author Institution: Department of Chemistry, University of York, Heslington, York YO10 5DD, UK; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA; Department of Physics, University of Toronto, Toronto, Ont., M5S 1A7, Canada