E-ion Collisions Nl Shell Ionization Cross Sections Of Theoretical Research

Electron-ion collision ionization cross section is one of the critical issues for use in modeling ionization balance in high-temperature plasmas as well as for certain diagnostic application and is the main dynamics cause in maintaining plasma ionization balance and interstage energy balance. Advances in this field will lead to the developments in basic subjects, such as astrophysics, optic, atomic and molecular physics, condensed matter physics, geophysics, laser ineritia fusion, thermodynamics, statistical physics and so on. It is important for weapons physics, explosive mechanics, material science, space technology, energy engineering, and other applied sciences. Calculating out Electron-ion collision ionization cross section for single ionization from the ground state of free atoms are important in Inertial Confinement Fusion physics. And these are discussed in this paper.Based on incident electron energy and electron temperature, a new method is introduced to determine the electron-ion impact cross sections. The total cross sections of electron impact single K-shell ionization of atomic targets C, Al, Ca, Ti, Cu, Ge, Mo, Ag, Pb, and Au with a wide angle of atomic numbers from z=6-92, are evaluated in the energy range up to about 1Mev employing the relativistic correction method, Which incorporates the ionic and relativistic effects. The experimental cross sections for all targets are reproduced satisfactory in the considered energies. Bethe K-shell-ionization cross sections are in good agreement with the experimental data and other theory at high energies. The relativistic effect is found to be significant in Ag, Pb and Au targets. We think the cross sections model is reasonable.Using the formula recently proposed, electron-impact ionization cross-sections for the ground state of free atoms up to Z=1-108 are given for energies of the impact electron between threshoid and lkev. The probable error is estimated to be approximately 20% - 30%, but near threshold the error is large and no fine structures are account for. In order to facilitate the guess work, we made the some assumptions, which should be accepted as working hypotheses, it turned out some measurements can be described by our empirical formula and the experimental constants. Results for single ionzitation atoms agree with 20% - 30% for the measured range of electron energies, I should suggest that some data need reconfirmation.