中低速C3+与He，Ne，Ar原子相互作用过程中单电子转移绝对截面的测量

实验测量了1.7v₀—4.2v₀(v₀为玻尔速度,v₀=2.19×10⁸cm/s)的C³⁺与He，Ne，Ar原子碰撞过程中单电子转移绝对截面.将实验结果与多体经典轨道蒙特卡罗模拟计算结果做了比较，发现测量结果与多体经典轨道蒙特卡罗模拟计算结果在趋势上相符.当入射离子速度在1.7v₀—2 关键词： 离子-原子碰撞 单电子转移 绝对截面

Measurement of single-electron transfer cross sections in collisions of C3+ with He, Ne, Ar atoms at low to intermediate velocity

Absolute cross sections for single-electron transfer of He， Ne， Ar atoms induced by C³⁺ at low to intermediate velocity (1.7v₀—4.2v₀) were measured and calculated using n-body classical trajectory Monte Carlo (nCTMC) method. Though good overall agreements are achieved between experimental and nCTMC results, certain differences are found. Because of the existence of polarization and the nCTMC being unable to calculate the multi-electron correlation capture cross sections, the experimental results are greater than those of nCTMC at low velocities(1.7v₀—2.0v₀). When the velocity of the projectile is higher(2.2v₀—4.2v₀), the captured electron’s partial screening of the projectile, the electron-electron dynamic correlation and the effective charge are taken into account in interpreting the qualitative differences between theoretical and experimental results. In addition, the cross section rations of transfer ionization to single electron capture are presented and the mechanism of transfer ionization are discussed.