Recent positron-atom cross section measurements and calculations
Recent positron-atom cross section measurements and calculations
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DOI：
10.1140/epjd/e2014-50436-4
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发表时间：
2014-10
期刊：
影响因子：
--
通讯作者：
L. Chiari;A. Zecca
中科院分区：
文献类型：
--
作者：
L. Chiari;A. Zecca
我们回顾了最近的低能正电子从原子靶散射截面的结果。比较了正电子与惰性气体碰撞的最新测量和计算，并简要更新了其他原子的最新研究。特别是，我们提供了一个概述的横截面的弹性散射，电子偶素形成，直接和总电离，以及总散射，通常在约0.1和几百电子伏特之间的能量。我们讨论了当前实验数据集的差异，并将这些结果与现有的理论模型进行了比较。还报告了每种惰性气体总截面的建议数据集。最后，对氢原子、碱金属和碱土金属原子以及双电子体系的散射研究的最新进展作了总结。
We review recent cross section results for low-energy positron scattering from atomic targets. A comparison of the latest measurements and calculations for positron collisions with the noble gases and a brief update of the newest studies on other atoms is presented. In particular, we provide an overview of the cross sections for elastic scattering, positronium formation, direct and total ionisation, as well as total scattering, at energies typically between about 0.1 and a few hundred eV. We discuss the differences in the current experimental data sets and compare those results to the available theoretical models. Recommended data sets for the total cross section are also reported for each noble gas. A summary of the recent developments in the scattering from other atoms, such as atomic hydrogen, the alkali and alkaline-earth metals, and two-electron systems is finally provided.