The special features of the formation of molecular ions on the surface of tantalum

Thermal emission of singly charged positive molecular ions, mass 254, from the surface of a tantalum band was studied. Thermal emission appeared if, first, oxygen acted on a tantalum band at a temperature higher than 600°C, and then the band was held at room temperature. At the time of holding t lon...

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Bibliographic Details
Published inRussian journal of physical chemistry. B Vol. 4; no. 3; pp. 521 - 525
Main Author Savchenko, O. Ya
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.06.2010
Subjects
Chemistry
Chemistry and Materials Science
Physical Chemistry
Surface Reactions
Nichrome Wire
Tantalum
Relative Current
Thermal Emission
Current Amplitude
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Summary:Thermal emission of singly charged positive molecular ions, mass 254, from the surface of a tantalum band was studied. Thermal emission appeared if, first, oxygen acted on a tantalum band at a temperature higher than 600°C, and then the band was held at room temperature. At the time of holding t longer than a minute, thermal emission linearly depended on . The special features of thermal emission were explained by the presence of a critical temperature of tantalum close to 400°C, at which all the molecular ions were emitted from the surface. A new model of their formation was suggested.
ISSN:1990-7931
1990-7923
DOI:10.1134/S1990793110030255