Free accessResearch articleFirst published online 2000-9
Molecular electronic branching ratios of CaI(A 2 Π 1/2,3/2,B 2 Σ + ) resulting from the reaction of Ca[4s4p( 3 PJ)] with CH 3 I following the pulsed dye-laser excitation of atomic calcium
Molecular electronic branching ratios to yield CaI(A2Π1/2), CaI(A2Π3/2) and CaI(B2Σ+) have been determined following the reaction of Ca[4s4p(3PJ)], 1.888 eV above the 4s2(1S0) ground state, with CH3I. These were determined from the combination of time-dependence and calibrated integrated intensity measurements of the atomic resonance fluorescence from Ca(43P1 → 41S0) and the molecular chemiluminescence from CaI(A2Π1/2,A2Π3/2,B2Σ+ → ×2Σ+) following pulsed dye-laser generation of Ca(43P1). The results were found to be as follows: A1/2 (2.7 ± 1.1) × 10−3, A3/2 (2.6 ± 1.3) × 10−3 and B, (2.0 ± 0.8) × 10−3.
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