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Single and double over-barrier ionization of He, He+ and Ne system by positron impact

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Abstract

The classical over-barrier ionization model (COBI) method and trajectory calculations were utilized to simulate the ionization of He+ impacted by a positron. The calculated ionization cross sections of He+ agree with other theoretical data. Additionally, we found that the double ionization of He has a definite association with the positron-He+ impact. This result can explain why doubly ionized He seemed to be positron-scattered by the rest of the He+ in our previous study. The COBI model was also extended to study the double ionization caused by positron-Ne impacts. Our theoretical results agree with the experimental data.

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Authors and Affiliations

  1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, P.R. China

    Aixiang Yang, Ning Zhang, Binghui Zhu, Xianrong Zou, Ximeng Chen & Jianxiong Shao

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  1. Aixiang Yang
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  2. Ning Zhang
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  3. Binghui Zhu
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  4. Xianrong Zou
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  5. Ximeng Chen
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  6. Jianxiong Shao
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Correspondence to Jianxiong Shao.

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Yang, A., Zhang, N., Zhu, B. et al. Single and double over-barrier ionization of He, He+ and Ne system by positron impact. Eur. Phys. J. D 71, 170 (2017). https://doi.org/10.1140/epjd/e2017-70500-9

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