Dynamical approach to the statistical average of atom-diatom collision
【摘要】：正The dynamical Lie algebraic method is used for the description of statistical mechanics of the atom-diatom collision. A main advantage of this method is that it can not only give the expression for evolutian operator in terms of the group parameter, but also provide the expression for the density operator for a given system. The group parameters can be determined by solving a set of coupled nonlinear differential equations. Thus, the expression of the statistical average values is derived in terms of the density operator formalism in statistical mechanics. And we can use the time evolution operator to calculate the transition probability. The method is applied to the collision of H2 with He. Comparing the results with the experimental results, we can see that the dynamical Lie algebraic method is useful for describing the molecule collision.