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首页> 外文期刊>Journal of Physics, B. Atomic, Molecular and Optical Physics: An Institute of Physics Journal >Absolute cross sections for multiple ionization of noble gases by swift proton impact
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Absolute cross sections for multiple ionization of noble gases by swift proton impact

机译:质子快速碰撞使稀有气体多重电离的绝对截面

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摘要

Absolute cross sections, sigma(q+), for multiple ionization of He (q = 1), Ne (q = 1, 2, and 3), Ar (q = 1, 2, 3, and 4), Kr (q = 1, 2, 3, and 4), and Xe (q = 1, 2, 3, 4, and 5) atoms by protons in the 0.75-3.5 MeV impact energy range have been measured. The present results are in good agreement with the previously published data in the case of the single- and double-ionization cross sections, but some non-systematic discrepancies appear for higher charge states. A detailed comparison with electron impact cross sections in these gases is performed, and it shows that the cross sections for single ionization by high-velocity protons are substantially smaller than those corresponding to equi-velocity electrons for heavier targets. [References: 32]
机译:He(q = 1),Ne(q = 1、2和3),Ar(q = 1、2、3和4),Kr(q =多次电离的绝对截面sigma(q +)已经测量了在0.75-3.5 MeV冲击能范围内质子的1,1,2,3,4)和Xe(q = 1,2,3,4,5)原子。在单电离和双电离横截面的情况下,当前结果与先前发表的数据非常吻合,但是对于较高电荷状态,会出现一些非系统性差异。与这些气体中的电子碰撞截面进行了详细的比较,结果表明,通过高速质子进行单次电离的截面明显小于对应于较重目标的等速电子的截面。 [参考:32]

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