The estimation of the G-values for ionization and excitation of ten-electron molecules: Methane, ammonia, and water irradiated bkeV keV electrons.

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概要

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• The binary-encounter collision theory is applied to calculate the <I>G</I>-values for the ionization and excitation of methane, ammonia, and water irradiated by 100 keV electrons. Double collision of the incident electron in a molecule is also taken into account. On the assumption of the occurrence of certain reactions in the systems, the <I>G</I>-values for electrons, various radicals, and several final products were estimated. Some of the results are as follows: the <I>G</I>-values for electrons were 3.60 for methane, 3.56 for ammonia, and 3.00 for water. These values are in fair agreement with the experimental values: 3.6 for methane, 3.8 for ammonia, and 3.3 for water. The calculated <I>G</I>-value for hot hydrogen atoms was about 1.0 for all three compounds. The ratios of the <I>G</I>-value for excitation to that for electrons are 1.1 for methane, 1.5 for ammonia, and 1.7 for water. An estimation was also made of the <I>G</I>-value for the emission of highly-excited hydrogen atoms using reported cross sections. The <I>G</I>-values are 0.1 for methane and ammonia, and 0.2 for water.

• 公益社団法人 日本化学会の論文

著者

• Okazaki Kiyoshi

  Department Of Electrical Engineering The Natinal Defense Academy

• Sato Shin

  Department Of Chemistry School Of Science The University Of Tokyo

• Ohno Shin-ichi

  Japan Atomic Energy Research Institute

• Sato Shin

  Department of Applied Physics, Tokyo Institute of Technology

• Okazaki Kiyoshi

  Department of Applied Physics, Tokyo Institute of Technology

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