Reaction dynamics of the

The Ca(1D2, 3PJ) + RI (R  CH3, C2H5, n-C3H7) → CaI(A,B) + R reaction system has been studied by measuring its chemiluminescence under beam gas conditions. Absolute values of the reaction cross-sections were determined at low collision energy ET ≤ 0.20 eV. In addition, the electronic branching ratio, photon yield and influence of the radical size group on the reaction cross-section have been estimated. The results are discussed in the light of different reaction mechanisms involving the attacking Ca atom into the Cz.sbnd;I bond.