Effects of long-range potentials on polarization of chlorine atoms from photodissociation of ICl.

Autor: Alexander, A. J., Peter Rakitzis, T.
Předmět:
Zdroj: Molecular Physics; 7/10/2005, Vol. 103 Issue 13, p1665-1676, 12p
Abstrakt: The polarization of Cl( 2 P3/2) atoms resulting from photodissociation of ICl in the range 490?nm to 560?nm has been analysed in detail. The most accurate-to-date set of the five O?=?0 + and O?=?1 adiabatic potential energy surfaces that correlate to the ground state Cl( 2 P3/2)?+?I( 2 P3/2) atoms have been constructed from available spectroscopic, ab initio , and long-range perturbation-theory data. Simulations of the photolysis-energy dependence of Cl-atom polarization, show non-adiabatic transitions occurring at R x?~?6.5?Å, with probabilities from B( 3 ?0+) to X( 1 ?0+) ( P ?=?0.96), A( 3 ?1) to a( 3 ?1) ( P ?=?0.12), and A( 3 ?1) to z( 1 ?1) ( P ?=?0.49). The simulations are shown to be sensitive to changes in the potential energy surfaces on the order of ? V ?=?30?cm -1 ?Å, reinforcing that these type of polarization experiments serve as an exceedingly stringent test of theory. [ABSTRACT FROM AUTHOR]
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