Absolute partial cross sections for electron-impact ionization of H2O and D2O from threshold to 1000 eV
Absolute partial cross sections for electron-impact ionization of H2O and D2O from threshold to 1000 eV
复制标题
H2O 和 D2O 的电子轰击电离从阈值到 1000 eV 的绝对部分横截面
DOI：
10.1063/1.475367
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发表时间：
1998
影响因子：
4.4
通讯作者：
R. Stebbings
中科院分区：
文献类型：
--
作者：
H. C. Straub;B. Lindsay;K. A. Smith;R. Stebbings
电子碰撞电离的H2O和D2O的绝对部分截面的电子能量从阈值到1000 eV的报告。提供了从H2O产生H2O ++ OH ++ O+、O2+、H2+和H+以及从D2O产生D2O+、OD+、O+、O2+、D2+和D+的数据。使用飞行时间质谱仪对产物离子进行质量分析，并使用位置敏感检测器进行检测，位置敏感检测器的输出表明所有产物离子都被完全收集。对于单电荷母离子，绝对截面值的总体不确定度为± 4.5%，对于碎片离子，总体不确定度略高。发现H2O和D2O的截面在实验不确定性范围内是相同的，除了H2+截面比D2+截面大约大2倍。以前的结果进行了比较，目前的测量。
Absolute partial cross sections for electron-impact ionization of H2O and D2O are reported for electron energies from threshold to 1000 eV. Data are presented for the production of H2O++OH++O+, O2+, H2+, and H+ from H2O and for the production of D2O+, OD+, O+, O2+, D2+, and D+ from D2O. The product ions are mass analyzed using a time-of-flight mass spectrometer and detected with a position-sensitive detector whose output demonstrates that all product ions are completely collected. The overall uncertainty in the absolute cross section values is ±4.5% for singly charged parent ions and is slightly greater for fragment ions. The cross sections for H2O and D2O are found to be the same to within experimental uncertainties except for the H2+ cross section which is approximately a factor of 2 greater than the D2+ cross section. Previous results are compared to the present measurements.