CHEMILUMINESCENT ASSOCIATIVE IONIZAION IN ALKALINE EARTH-METASTABLE ARGON COLLISIONS
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Date
1978
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Energy transfer form metastable Ar, produced in a flowing afterglow, to atomic Ca results in chemiluminescent chemiionization of Ca and chemiluminescent associative ionization, forming $CaAr^{+}(A^{2}\Pi)$. Inversion of the $A^{2}\Pi\rightarrow X^{2}\Sigma^{+}$ spectrum of $BeAr^{+}$ reported by Subbaram, $et al.,^{1}$ yields potential functions which can $be^{2}$ very accurately matched by a model potential of the form $V(R) = Aexp(-\beta R) - Z^{2}e^{2} \alpha/2R^{4}$, where z is the effective charge of the alkaline earth ion. We have used this potential to analyze of the $CaAr^{+}$ emission spectrum. These molecular ions exhibit bonding properties intermediate to chemically bound diatomics and to Van der Waals diatomics. An additional phenomenon, laser-assisted excitive Penning ionization, will be discussed whereby a laser field which is not resonant with either the products or the reactants of a collision but is resonant with the collision itself, can alter the product states.
Description
$^{1}$K. V. Subbaram, J.A. Coxon, and W.E. Jones, Can. J. Phys. 54, 1535 (19750). $^{2}$J. H. Goble, D. C. Hartman, and J. S. Winn, J. Chem. Phys. 67, 4206 (1977).""
Author Institution: Department of Chemistry, University of California
Author Institution: Department of Chemistry, University of California