1993 Volume 66 Issue 11 Pages 3253-3258
The mechanism of above-threshold dissociation (ATD) of both hydrogen and deuterium molecular ions has theoretically been investigated. A quantum-mechanical, time-dependent nuclear wave-packet theory has been applied to evaluation of the kinetic energy distributions of H2+ and D2+ photodissociations. The time-dependent shift of the kinetic energy distribution to the low energy side, which is common to both H2+ and D2+ ATD, is interpreted in terms of dynamic Stark shift. The different behavior in the intensity ratio of the kinetic energy distribution between H2+ and D2+ ATD is qualitatively explained by applying the Landau–Zener model to radiative coupling between the ATD channels involved.
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