Optical and optical Stark spectra of the 000 Ã2E-X̃2A1 band system of a supersonic molecular beam sample of calcium monomethyl, CaCH3, have been recorded. Field free spectroscopic parameters were obtained on fitting the (|KR′| = 1, |K′|=0 and 2)-(|KR″| = 1) and the (|KR′| = 0, |K′|=1)-(|KRPrime;| = 0) subbands. The branch features were reassigned and a resulting new set of spectroscopic parameters determined. The value of the a-principal axis component of the spin-rotation parameter, εaa(Ã2E), is now consistent with the assumed nature of the low-lying excited electronic states, Dipole moments of 2.62±0.03 D and 1.69±0.02 D were determined for the X̃2A1 and Ã2E states, respectively. A simple electrostatic model was adapted to predict dipole moments for CaCH3 and MgCH3.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry