Compilation of the data-base of symmetric charge-transfer cross section

原子及其位置之间的共振电荷转移的交叉部分已计算在低浓度和中等浓度频率范围内的所有非过渡元素（<la. u.），从1930年代开始，实验性数据被收集起来。这个交叉部分是由影响参数和近距离耦合方法计算的。为了在两个原子系统中解决一个电子时间依赖的、无自旋的电子波功能，该波功能被扩展为一套旅行原子波功能中心的术语，每个核都有。作为每个原子的特征， Hartree Fock Slater的波功能被使用。计算结果是一个公平良好的协议，用精心研究的元素的实验结果汇编，并提供了实验数据的有用干扰/外处理。一个经过修改的交叉光束装置，以计量电荷-转移金属元素的交叉部分在宽影响-能量范围（10- 1000 eV）已经开发。在一个天竺葵原子之间的电荷转移交叉部分及其正离子被测量为一个交叉光束装置，其特征是主离子生产的光离子化与一个可调谐的染料激光器。Gdion的初始状态被调节为在地面状态下的光子能量，被关闭为电离潜能的能量。地面状态的Gd离子与Gd原子在地面和一些激动人心的状态下碰撞。交叉部分作为影响能量的一个功能（30- 1000 eV）是成功的。cross section at 1000 eV was 3.3 x10 ^\-14>cm^2。The obtained cross sections are larger than those of^ハother elements obtained experimentally in the past。

Cross sections for resonant charge transfer between atoms and their positive ions have been calculated for all non-transition elements in the range of low and intermediate collision velocities (<la.u.), and experimental data obtained since the 1930's have been compiled. The cross sections have been calculated by the impact-parameter and close-coupling methods. To solve the one electron time-dependent, spinless electronic wavefunction in a two atom system, the wavefunction was expanded in terms of a set of traveling atomic wavefunctions centered about either nucleus. As the eigenfunction of each atom, Hartree Fock Slater wavefunctions were used. The calculated results are in fairly good agreement with the compiled experimental results for the thoroughly studied elements and, thus, provide a useful interpolation/extrapolation of the experimental data.A modified crossed-beam apparatus to measure charge-transfer cross sections of metallic elements in wide impact-energy range (10-1000eV) has been developed. The charge-transfer cross section between a gadolinium atom and its positive ion has been measured with a crossed-beam apparatus which features primary ion production by photoionization with a tunable dye laser. The initial state of Gd ions were controlled to be in the ground state by tuning the photon energy to be closed to the ionization potential energy. The Gd ions in the ground states were collided with the Gd atoms in the ground and some excited states. The cross sections as a function of impact-energy (30-1000eV) were successfully obtained. The cross section at 1000eV was 3.3x10^<-14>cm^2. The obtained cross sections are larger than those of^ハother elements obtained experimentally in the past.