Abstract
A new calculation method was developed in this paper. With the natural collision coordinate, the core translational equation along the reactive coordinate was solved by the numerical propagation method on the partial potential energy surface. Then the resonance lifetime matrix of reactive system was constructed by the eigen-phase shift of the wave function of transient collision complex. So it was a direct calculation method on the lifetime of scattering resonance states. The lifetime of first scattering resonance state of the I+HI(ν)→IH(ν′)+I reaction has been calculated by our method, which is in good agreement with Neumark′s experimental results of the high-resolved-threshold-photodetachment spectroscopy of this reaction.
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