Multi-Electron Processes in 13C6+ Ions with Neon Collisions in Energy Region 4.15-11.08keV/u

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2006,（1）
• 页码范围: 95-98
• 页数: 4页
• 语种: 英文

摘要

The cross-section ratios of double-, triple-, quadruple-, and the total multi-electron processes to the single electron capture process (σDE/σSC ,σTE/σSC ,σQB/σSC and σME/σSC) as well as the relative ratios among reaction channels in double-electron active, triple-electron active and quadruple-electron active are measured in 13C6+-Ne collision in the energy region of 4.15-11.08 keV/u by employing position-sensitive and time-of-flight coincident techniques. It is determined that the cross-section ratios σDE/σSC ,σTE/σSC ,σQE/σSC and σME/σSC are approximately the constants of 0.20 ±0.03, 0.16±0.04, 0.06±0.02 and 0.42±0.05. These values are obviously smaller than the predictions of the molecular Coulomb over-the-barrier model (MCBM) [J. Phys. B 23 (1990) 4293], the extended classical over-the-barrier model (ECBM) [J. Phys. B 19 (1986) 2925] and the semiempirical scaling laws (SL) [Phys. Rev. A 54 (1996) 4127]. However, the relative ratios among partial processes of DE, TE and QE are found to depend on collision energy, which suggests that the collision dynamics depends on the collision velocity. The limitation of velocity-independent character of ECBM, MCBM and SL is undoubtedly shown.