Benchmark cross sections for electron-impact total single ionization of helium

Benchmark cross sections for electron-impact total single ionization of helium
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氦电子轰击总单次电离的基准截面

DOI:
10.1088/0953-4075/44/6/061001
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发表时间:
2011
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
D. Fursa
D. Fursa
中科院分区:
--
文献类型:
--
作者:
I. Bray;D. Fursa

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我们建立了电子碰撞电离氦的总单电离截面,精度为百分之几,从近阈值到1千电子伏。这是完全从头计算使用收敛的紧耦合方法,而不经常使用的冻结核近似。我们发现与RejouB等人(2002 Phys. Rev. A 65 042713)和Sorokin等人(2004 J. Phys. B:At.摩尔Opt.Phys.373215),比以前使用的标准低约5%。
We establish the total single ionization cross section for electron-impact ionization of helium, to an accuracy of few per cent, from near threshold to 1 keV. This is done fully ab initio using the convergent close-coupling method without the often-used frozen-core approximation. We find excellent agreement with the most recent measurements of Rejoub et al (2002 Phys. Rev. A 65 042713) and Sorokin et al (2004 J. Phys. B: At. Mol. Opt. Phys. 37 3215), which are around 5% less than the previously used standard.