Collision energy dependence of the HD (v'=2) product rotational distribution of the H+D_2 reaction in the range 1.30-1.89 eV

摘要

An experimental and theoretical investigation of the collision energy dependnece of the HD (v'=2,j') rotational product state distribution for the H+D_2 reaction in the collision energy range of E_(col)=1.30-1.89eV has been carried out.Theoretical results based on time-dependent and time-independent quantum mechanical methods agree nearly perfectly with each other,and the agremetn with the experiment is good at low collision energies and very good at high collision energies.This behavior is in marked contrast to a previous report on the HD (v'=3,j') product state rotational distribution [Pomerant et al.,J.Chem.Phys.120,3244 (2004)]where a systematic difference between experiment and theory was observed,especially at the highest collision energies.The reason for this different behavior is not yet understood.In addition,this study employs Doppler-free spectroscopy to resolve an ambiguity in the E,F-X resonantly enhanced multiphoton ionization transition originating from the HD (v'=2,j'=1) state,which is found to be caused by an accidental blending with the transition coming from the HD (v'=1,j'=4) state.