Molecular electronic branching ratios of Cal(A(2)II(1/2,3/2),B-2 Sigma(+))resulting from the reaction of Ca[4s4p(P-3(J))] with CH3I following the pulsed dye-laser excitation of atomic calcium.

Molecular electronic branching ratios to yield Cal(A(2)Pi (1/2)), Cal(A(2)P i (3/2)) and Cal(B(2)Sigma (+)) have been determined following the reaction of Ca[4s4p(P-3(J))], 1.888 eV above the 4s(2)(S-1(0)) ground state, with C H3I. These were determined from the combination of time-dependence and cali brated integrated intensity measurements of the atomic resonance fluorescen ce from Ca(4(3)P(1) --> 4(1)S(0)) and the molecular chemiluminescence from Cal(A(2)Pi (1/2),A(2)Pi (3/2),B(2)Sigma (+) -->X(2)Sigma (+)) following pul sed dye-laser generation of Ca(4(3)P(1)). The results were found to be as f ollows: A(1/2) (2.7 +/- 1.1) x 10(-3), A(3/2), (2.6 +/- 1.3) x 10(-3) and 8 , (2.0 +/- 0.8) x 10(-3).