Absolute partial and total cross sections for electron-impact ionization of argon from threshold to 1000 eV.
Absolute partial and total cross sections for electron-impact ionization of argon from threshold to 1000 eV.
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DOI：
10.1103/physreva.52.1115
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发表时间：
1995-08
期刊：
影响因子：
--
通讯作者：
Straub;Renault;Lindsay;Smith;Stebbings
中科院分区：
文献类型：
--
作者：
Straub;Renault;Lindsay;Smith;Stebbings
报道了用电子轰击Ar电离产生~1000 eV的绝对部分截面。文中还报告了由部分截面的适当加权和得到的总截面。这些结果是通过一种结合了飞行时间质谱仪和对产物离子进行位置敏感检测的设备获得的。简单的仪器设计体现了压力测量和颗粒检测的最新发展，并被认为产生了比以前报道的更可靠的结果。对于单电荷离子，这里报告的绝对截面值的总不确定度为\ifmmod\pm\Else\TextPM\fi{}3.5%。回顾了前人对绝对部分截面和总截面的测量，并与目前的结果进行了比较。
Absolute partial cross sections from threshold to 1000 eV are reported for the production of ${\mathrm{Ar}}^{\mathit{n}+}$ (n=1\char21{}4) by electron-impact ionization of argon. The total cross sections, obtained from an appropriately weighted sum of the partial cross sections, are also reported. These results are obtained with an apparatus incorporating a time-of-flight mass spectrometer with position-sensitive detection of the product ions. The simple apparatus design embodies recent developments in pressure measurement and particle detection and is believed to yield more reliable results than those previously reported. For singly charged ions, the overall uncertainty in the absolute cross section values reported here is \ifmmode\pm\else\textpm\fi{}3.5%. Previous measurements of absolute partial and total cross sections are reviewed and compared with the present results.