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固体中氢、氘负离子的形成和电荷交换截面的测量

DETERMINATION OF THE CHARGE EXCHANG CROSS SECTION AND FORMATION OF H- AND D- IN SOLID

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【作者】 杨百方蒋增学师勉恭郝士琢雷晓兰缪竞威

【Author】 Yang Baifang Jiang Zengxue Shi MiangongHao Shizho Lei Xiaolan Miao Jingwei (Institute of Nuclear Science and Technology)

【机构】 四川大学原子核科学技术研究所四川大学原子核科学技术研究所

【摘要】 用电荷交换的观点,分析在束箔离子相互作用中的负离子形成过程.导出了负离子产额与电荷交换截面的关系为:φ-?2/(3σi2).证明φ-与入射核子速度有关,与停留时间无关.报告了在不同入射速度下,H+,D+,H2+,D2+和He+等种离子在碳膜中产生的H-,D-或He-的测量结果.由此得到电子损失截面σl和电子浮获截面σc的观测值.

【Abstract】 Based on the analysis of the atom-solid collision, the formation process of negative ions in the beam-foil interaction by means of the view of the charge exchanging in solids have been analyzed. The relationship between the yield of negative ion and the charge exchanging cross sections and is deduced as: which provids that the depends only on the speed of the bombarding particles and without relation to the dwelltime of the particle in the foil. The measured results of the yields of H, D- or He- produced by the H+, H+, D+ D2+ or H2+ ions with various speeds passing through carbon foil have been reported, separately. The electron loss cross section and electron capture cross section are obtained from the experiments. It is demonstrated that a, is larger than bs and is less than bs. In this paper, the effect of molecular cluster on the charge exchanging process is also discussed.

【基金】 国家自然科学基金资助项目
  • 【文献出处】 四川大学学报(自然科学版) ,Journal of Sichuan University (Natural Science Edition) , 编辑部邮箱 ,1989年03期
  • 【被引频次】4
  • 【下载频次】24
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