The investigation of inelastic scattering between helium atom and lithium molecule

In this thesis, time dependent wave packet method has been applied to the He+Li2 (?,j)?He+Li2 (??,j?) reaction in three dimensional (3D). The method used is based on the solution of time dependent Schrodinger equation. The Time Dependent Schrodinger equation which is an initial value problem is solved by means of Fourier Grid methods. However, the time dependent propagation of the wave packet on a potential energy surface is accomplished by an expansion in terms of modified complex chebychev polynomials. The propagation requires repeatedly operation of the Hamiltonian operator on the wave function. Transition probabilities among the state-to-state Quantum levels and distributions in the production channel have been calculated for total angular momentum J=0 in a broad range ofcollision energies. For the calculation of integral cross-sections, the transition possibilities forall J?0 reaction probabilities have been determined by the means of simple J-Shifting Approach and the reaction rate constans have been obtained J-Shifting and Uniform-JShifting Approximations.Keywords: Inelastic Scattering, Hamiltonian Operation, Transition Probabilities, Cross SectionsRate Constant.