Absolute Measurements of Emission Cross-Sections for Dissociative Excitations of H_2O by Electron-Impact with Crossed-Beam Apparatus and High Sensitive Quartz Spring Balance

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概要

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• Absolute measurements of the emission cross-sections for the A-X band-spectrum of OH and the H_β line in the dissociative excitation processes of H_2O by electron-impact have been carried out by means of the crossed-beam technique, with the aid of a high sensitive spring balance made of fused quartz. The spring has a tiny pan, which is surrounded by a specially designed trap of liquid nitrogen. The spring words well for direct intensity measurements of the water molecular beam, because the condensation coefficient of H_2O on ice is large enough at lower temperatures. The following results have been obtained; (4.2±2.1)×10^<-18>cm^2 for the H_β transition, and (7.1±3.5)×10^<-18>cm^2 for the OH (A, ^2Σ^+-X, ^2II) transition, at 300eV respectively.

• 社団法人日本物理学会の論文
• 1974-02-15

著者

• Iwai Tsuruji

  Physics Department Faculty Of Science Osaka University

• Horie Tadao

  Physics Department Faculty Of Science Osaka University

• Tsurubuchi Seiji

  Physics Department Faculty Of Science Osaka University

• IWAI Tsuruji

  Physics Department, Faculty of Science, Osaka University

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