Laser Spectroscopic Investigations of CaCl. II. Rotational Analysis of the B²Σ- X²Σ 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.

Measurement of product alignment in beam–gas chemiluminescent reactions

“…Band heads are formed in the PI and P 2 branches. Their vibrational numbering is based on the recent analysis of Berg et al 34 The R branch lines contribute to the underlying background. The spectrum we have obtained is essentially identical to that observed by Brinkman et al 32 Having verified the identity of the emitter, subsequent experiments were carried out under the same conditions but with the monochromator set to a resolution of 0.1 nm (FWHM) and fixed on the peak found at 593.52 nm (marked by an arrow in Fig.…”

Determination of Branching Ratios in a Kinetic Investigation of the Atomic Resonance Fluorescence and Molecular Chemiluminescence, CaCl(A2Π1/2,3/2, B2Σ+ → X2Σ+), Resulting From the Reaction of Ca[4s4p(3PJ)] With CH3Cl Following Pulsed Dye Laser Excitation of Atomic Calcium

“…r' e' 0.24353 nm) [33,34]. Berg et al [35,36] have characterised the spectroscopic constants for CaCI(A2II, B2] +) from laser spectroscopic investigations of the A-X and B-X systems (A2II'w'e 367.196cm-1, eXe! .524cmr e t 0.24157 nm).…”