Surface Ionization of Some Rare Earth Elements on Hot Polycrystalline Tungsten Surface

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概要

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• The surface ionization of the rare earth elements Gd, Ho, Dy, Pr and Er has been studied for very low electric field (< 3KV/cm) at the surface and the ionization potentials (I.P.) of these elements have been measured. The values of ionization potentials are: Gd- 6.73±0.09eV, Ho- 6.08±0.09eV, Dy- 5.72±0.10eV, Pr- 5.61±0.11eV and Er- 6.36±0.10eV. A reasonable agreement of these values with the spectroscopically determined ones suggest that the degree of ionization follows the general form of the Saha-Langmuir equation. The measurements, carried out with rare earth chloride molecular beams on the polycrystalline surface, indicate that (1) complete dissociation of the rare earth halides occur for surface temperatures at 〜2000°K, (2) above 2000°K the surface remains free of adsorbed chlorine and (3) the variations of the ratios of the statistical weight factors of the ions and atoms with temperature are small.

• 社団法人日本物理学会の論文
• 1967-08-05

著者

• KARMOHAPATRO S.

  Saha Institute of Nuclear Physics

• DEY S.

  Saha Institute of Nuclear Physics

• Dey S.D.

  Saha Institute of Nuclear Physics

関連論文

• Sputtering of Iron under Molecular Ion Bombardment
• Investigations on the Sputtered Ejection Patterns from Ag (111) Single Crystal
• Charge Exchange of Cl^- Ions witll Atomic Chlorine
• Surface Ionization of Some Rare Earth Elements on Hot Polycrystalline Tungsten Surface
• First Atomic Ionization Potentials of Dysprosium and Praseodymium

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