Abstract
By using the time-of-flight technique under crossed-beam conditions, the collision energy dependence of the Ca(1D) + HCl → CaCl(A) + H reaction cross-section has been measured over the 0.2−0.5 eV collision energy range and found to have a broad peak at 0.3 eV. An empirical description of entrance covalent channelsincluding orbital alignment effects due to the open-shell nature of calcium atomsand a harpooning mechanism, involving ionic charge-transfer states, account for the observed translational energy dependence of the reaction cross section.
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