Theoretical calculation of the partial cross section for first vibrational excitation in He--H₂ (D₂ ,T₂) collisions

In this paper, close-coupling method was applied to the He--H_2(D_2,T_2) system, and the first vibrational excitation cross sections of `00--10, 00--12, 00--14, 00--16' at different incident energy have been calculated．By analyzing the differences of these partial wave cross sections, this paper have obtained the change rules of the partial wave cross sections with increases of quantum number, and with change of reduced mass of system. Based on the calculation, influence on the partial wave cross sections brought by the variations in the reduced mass of systems and in the relative kinetic energy of incident atoms is discussed.