Laser Spectroscopic Investigations of CaCl. II. Rotational Analysis of the B2Σ- X 2 Σ Transitions

Abstract

Diatomic calcium chloride has been examined by means of laser excitation and fluorescence spectroscopy. A small resistance furnace and a c.w. Rhodamine 6G dye laser were used to produce the spectra. The absorption spectrum of CaCl was also recorded by using a 5 m Jarrel Ash spectrograph. The following rotational and vibrational constants of the B 2Σ and X 2Σ states have been derived (cm-1): B 2Σ+ X 2Σ+ Te 16 856.684(4) 0.0 ωe 367.196(6) 370.201(1) ωexe 1.524(2) 1.3732(1) ωeye 8.6(2) × 10-3 9.3 × 10-3 ωeze -3.8(2) × 10-4 -4.8(2) × 10-4 Be 0.154 704(1) 0.152 233 αe 8.835(3) × 10-4 7.92 × 10-4 De 1.1409(4) × 10-7 1.068 × 10-7 γe -6.531(7) × 10-2 1.38 × 10-3 γD 1.36(6) × 10-7 0.0 αγ -4.0(6) × 10-4 0.0 The figures in parentheses stand for one standard deviation in the last digit for the computed quantity.