| The vector properties and the scalar properties are equally important in atom molecular collision process, and the vector properties have a reflection of some stereo dynamics information in the atom molecular collision process. Only by taking the vector properties and scalar properties together, can we have a full understanding on the atom molecule collision process. In recent decades, with the development of theoretical research and experimental technology, molecular reaction dynamics rapidly becomes a hot field. In many of the atom molecule collision systems, the atom diatom collision, especially the insert reaction He+H2+→HeH++H and its isotopic variants, in recent years have attracted considerable attention both experimentally and theoretically. This reaction system is of great importance in its application to astronomy, astrophysics, particle physics, nuclear physics and nuclear engineering, and it also can be used as a model to test whether a new theory conforms to experimental results or not, since it is a relatively simple collision system. This article will have a detailed study of the dynamic properties of the He+H2+ and its isotopic variants reaction with quasi-classical trajectory calculations, and obtained some meaningful conclusion about atoms diatomic collision.The first chapter of this paper describes the molecular reaction dynamics and stereo molecule reaction dynamics development, and then introduces the current He+H2+ research situation, and finally make a brief description of potential energy surfaces theory.In chapter two, the mathematical theory used in this paper are described.In chapter three, the influence of the collision energy on the stereo dynamics of the reaction He+H2+ has been investigated. The results demonstrate that the anisotropy distribution of rotational angular momentum vectors j′of the products becomes higher when the collision energy increases, The P(φr) distribution which describes the k-k′-j′correlation presents different characteristics for different collision energies, and the P(φr) distribution is not symmetric with respect toφr=πwhich is caused by the repulse energy between atoms. The variation of collision energy has an extremely important influence on polarization differential cross section, and the influence of the collision energy, on the forward scattering, is beyond other factors.In chapter four, the influence of the vibrational number on the stereo dynamics of the reaction He+H2+ has been investigated. The peak of P(θr) distribution which describes the k-j′correlation becomes higher when the collision energy increases, which shows that an increase of collision energy will increase the anisotropic distribution of the product rotational angular momentum vector j′. The P(φr) distribution describes the k-k′-j′correlation, whenυ=0, j′is not only aligned, but also oriented along the positive direction of y-axis, whenυ=1, 2, j′is oriented along the negative direction of y-axis. The polarization differential cross section also presents different characteristics for different vibrational number.In chapter five, the influence of the isotope effect on the stereo dynamics of the reaction He+H2+ has been investigated. The peak of P(θr) distribution which describes the k-j′correlation becomes lower when the mass of the B atom increases, which shows that an increase of mass of the B atom (for the reaction of A+BC→AB+C) will decrease the anisotropic distribution of the product rotational angular momentum vector j′. The P(φr) distribution describes the k-k′-j′correlation, for the three reaction He+H2+→HeH++H,He+DH+→HeD++H,He+TH+→HeT++H, and j′is not only aligned, but also oriented along the negative direction of y-axis. The polarization differential cross section also presents different characteristics for different vibrational number.Finally, a brief summary of the paper and the prospect of molecular dynamics are given in chapter six. |
