Chin. Phys. Lett.  2006, Vol. 23 Issue (1): 95-98    DOI:
Original Articles |
Multi-Electron Processes in 13C6+ Ions with Neon Collisions in Energy Region 4.15--11.08keV/u
RUAN Fang-Fang1,3;CAI Xiao-Hong1;YU De-Yang1;LU Rong-Chun1,3;SHAO Cao-Jie1;LU Jun1;CUI Ying2;SHAO Jian-Xiong2;XU Xu2;ZHANG Hong-Qiang2;DING Bao-Wei2;YANG Zhi-Hu1;CHEN Xi-Meng2
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 2Department of Modern Physics, Lanzhou University, Lanzhou 730000 3Graduate School of the Chinese Academy of Sciences, Beijing 100049
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RUAN Fang-Fang, CAI Xiao-Hong, YU De-Yang et al  2006 Chin. Phys. Lett. 23 95-98
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Abstract The cross-section ratios of double-, triple-, quadruple-, and the total multi-electron processes to the single electron capture process (σDESC, σTESC, σQESC and σMESC 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--11.08keV/u by employing position-sensitive and time-of-flight coincident techniques. It is determined that the cross-section ratios σDESC, σTESC, σQESC and σMESC 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.
Keywords: 34.70.+e      82.30.Fi     
Published: 01 January 2006
PACS:  34.70.+e (Charge transfer)  
  82.30.Fi (Ion-molecule, ion-ion, and charge-transfer reactions)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I1/095
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RUAN Fang-Fang
CAI Xiao-Hong
YU De-Yang
LU Rong-Chun
SHAO Cao-Jie
LU Jun
CUI Ying
SHAO Jian-Xiong
XU Xu
ZHANG Hong-Qiang
DING Bao-Wei
YANG Zhi-Hu
CHEN Xi-Meng
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