Transfer ionization of the isocharge sequence ion and Ar collisions |
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Authors: | Cai Xiao-Hong Yu De-Yang Cao Zhu-Rong Lu Rong-Chun Yang Wei Shao Cao-Jie and Chen Xi-Meng |
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Institution: | Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Department of Modern Physics, Lanzhou University, Lanzhou 730000, China |
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Abstract: | The ratios of transfer ionization to single capture for isocharge C^{q+}, N^{q+}, O^{q+}, Ne^{q+} ions on Ar atoms are measured by using position-sensitive and time-of-flight techniques. It is found that the ratio R_{1} increases with nuclear charge Z in a q=4 sequence, and the ratio R_{1} sequences have the minimum values at Z=7 and Z=8 in q=5 and q=6 sequences, respectively, and the ratio R_{1} decreases with the increase in the nuclear charge Z in a q=7 sequence. The results may be explained within the frame of the statistical model. It may be concluded that the transfer ionization depends remarkably upon the electronic structure of the projectile. The projectiles used in this study have the same charge state and velocity, but different electronic structures. The dependence of the ratio R_{1} on q is studied for Ne^{q+}-Ar collisions. The ratio R_{1} is found to increase as q increases for Ne^{q+}-Ar collisions. The measured dependence of the ratio R_{1} on q is compared with the calculation using the molecular Coulomb over-barrier model. |
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Keywords: | charge transfer transfer ionization |
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