The classical trajectroy Monte Carlo method is empolyed to calculate the charge transfer cross sections and the n shell distribution of capture electron for the collision of ions with hydrogen.For the collision of partial ionized ions with hydrogen,a q-scaled cross section is obtained by introducing the reduced variables.The present results are in good agreement with experimentally measured results.

A fully relativistic distorted-wave Born theory for calculating electron impact excitational cross sections of highly charged ions is presented. Some calculation results are also given and compared with other calcultions.

Charge transfer cross sections in C^q+ +H, N^q+ + HO ^q+ + H collisions are calculated with the CTMC method. The energy range of incident projectile is from 10keV/amu to 250keV/amu. The ions are partially stripped o rfully. Hamilton's equations of motion are given by the 12 coupled equations. Six pseudo-random parameters are required for the determination of the trajectories. A model potential between A^q+ ion and the active electron is used. The other two interactions are pure Coulombic. In our calculation, more than 2000 trajectories are required. Introducing reduced variables, σ_tr=σ_tr/q, E=E/q^1/2, a q-scaled electron capture cross section curve is obtained, all cross section data are grouped around a single curve. Numerical results are compared with other theoretical calculations. It shows that the resuts are in reasonable agreement with other Ones.

In this paper, we use classical trajectory Monte-Carlo theory to calculate the collision between fully ions and H atom. By solving the Hamiltonian equations of the system, we obtain the cross sections of charge transfer and ionization. Comparison with the ORNL recommended data shows that our results are in good agreement in the intermediate energy range. The method is correct and the results are satisfactory.

The electron impact excitation of He-like ions is studied by distorted wave method. The HFS wave functions of the target are used. We have calculated the transitions between the 1¹S and 2^1,3S, 2^1,3P states for some He-like ions. Results are presented in terms of collision strengths. The incident electron energies are from threshold to x=10. The results are compared with the data avaible. It is shown that the results are satisfied in most cases.

ALADDIN ("A Labelled At.omic Data Interface")has been designed by R.A.Hulse. originally. The basic features of this system are introduced here. The system software, data files and dictionary files are described briefly. Finally we give an example to describe how to link the user 's code.

This paper briefly describes the theoretical deduction of the cross section of electron-ion impact excitation in Coulomb-Born approximation. The LS coupling representation of electron-ion system is used, the exchange effect is taken into account and the angular factors of collision matrix elements are treated in detail. The corresponding code-CBX(9) is programed. The situations of complex ions and incident electrons with lower energy can be computed by the code, which has wide applicability. The computational results are in well agreement with ones obtained from the other methods.