ISSN:
0040-5744
Keywords:
Key words: Functional sensitivity densities
;
Nonadiabatic collisions
;
Diabatic potential energy curves
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary. The functional sensitivity densities δ ln σ12(E)/δ ln V ii (R) for He++Ne(2p 6)→He++Ne(2p 53s) reveal that the collisional excitation cross section σ12(E) is insensitive to the additional diabatic curve V 33 included in some models. The negligi ble sensitivity of σ12(E) to V 33 offers a quantitative validation of the more popular two state model for collisional excitation of Ne by He+. The sensitivity profiles for the collisional ionization Li+I→Li++I- modeled by crossing diabatic curves V 11 (covalent) and V 22 (ionic) shows that the ionization cross section does not depend on inner crossings even when these stem from large disto rtions in the underlying potential energy curves. The lack of sensitivity to inner crossings establishes the predominant role of the outermost crossing in triggering nonadiabatic transitions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01113539
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