Elastic scattering of electrons by water molecules over the range 100-1000 eV

Akira Katase, Kenji Ishibashi, Yuzuru Matsumoto, Takeji Sakae, Shinya Maezono, Eiji Murakami, Keigo Watanabe, Hideaki Maki

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Abstract

Relative values of differential cross sections (DCS) are measured by the crossed-beam method. Two cylindrical-mirror energy analysers are employed. One of them is moved to detect scattered electrons at every angle, and the other is fixed at an angle to monitor the elastic scattering events. The effects of target gas distributions in a molecular beam flowing out from a multicapillary array are taken account of to correct the relative values. The DCS are also measured at an angle for water molecules and helium atoms by using gas chamber. On the basis of the absolute DCS for He measured by Jansen et al. (1976), the relative DCS for water molecules are converted into absolute values. In addition, the DCS are calculated by the partial-wave method for the double Yukawa potential. The values of its three adjustable parameters are determined by comparison with the experimental DCS. A spherically symmetric realistic potential is also inferred without adjustable parameters from the charge distribution that was derived from molecular-orbital theory. The DCS calculated for this potential reproduce the experimental values fairly well.

Original languageEnglish
Article number020
Pages (from-to)2715-2734
Number of pages20
JournalJournal of Physics B: Atomic and Molecular Physics
Volume19
Issue number17
DOIs
Publication statusPublished - Dec 1 1986

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Katase, A., Ishibashi, K., Matsumoto, Y., Sakae, T., Maezono, S., Murakami, E., Watanabe, K., & Maki, H. (1986). Elastic scattering of electrons by water molecules over the range 100-1000 eV. Journal of Physics B: Atomic and Molecular Physics, 19(17), 2715-2734. [020]. https://doi.org/10.1088/0022-3700/19/17/020