Ionizing Collisions of the Metastable and Long-lived Highly Excited States of Helium Atoms with Water Vapor

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概要

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• Long-lived excited states of He<SUP>*</SUP>(2<SUP>1</SUP>S and 2<SUP>3</SUP>S)and He<SUP>**</SUP>(in highly excited states), produced by impact of 20-200eV electrons were allowed to collide with H<SUB>2</SUB>O and D<SUB>2</SUB>O molecules. It was confirmed that ions H<SUP>+</SUP>, HeH<SUP>+</SUP>, OH<SUP>+</SUP> and H<SUB>2</SUB>O<SUP>+</SUP> were produced by impact of He<SUP>*</SUP> with H<SUB>2</SUB>O. An ion produced by, a rearrangement chemi-ionization, HeH<SUP>+</SUP>, was identified for the first time in the He<SUP>*</SUP>+H<SUB>2</SUB>O system. Another process, where He<SUP>**</SUP> is ionized into He<SUP>+</SUP> by collision with H<SUB>2</SUB>O, was also observed. These processes were discriminated by the difference in the threshold energies of the electrons used for exciting the helium atoms. The corresponding deuterated ions were observed when D<SUB>2</SUB>O was used for the target.

• 日本質量分析学会の論文

著者

• Kuchitsu Kozo

  Department Of Chemistry Faculty Of Science The University Of Tokyo

• Shibata Takemasa

  Department Of Chemistry And Fuel Research Japan Atomic Energy Research Institute

• Fukuyama Tsutomu

  Department Of Chemistry Faculty Of Science The University Of Tokyo

• SHIBATA TAKEMASA

  Department of Chemistry, Faculty of Science, The University of Tokyo

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