Photoelectron emission from solid Ne tested by impurity adsorption

• Published in: Физика низких температур
• Date: 2009
• Main Author: Dmitriev, Yu.A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2009
• Subjects: 7th International Conference on Cryocrystals and Quantum Crystals
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117106
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Photoelectron emission from solid Ne tested by impurity adsorption / Yu.A. Dmitriev // Физика низких температур. — 2009. — Т. 35, № 4. — С. 350-354. — Бібліогр.: 12 назв. — англ.

Electron emission was obtained from a solid Ne sample growing from the gas phase on a low temperature substrate. The surface of the sample was irradiated by the light of an open-source microwave discharge running in the gaseous Ne. A second gas flow of CH₄ was, simultaneously, passed onto the substrate avoiding the discharge zone. Free electrons ejected into a vacuum chamber during the sample growth were detected by means of the electron cyclotron resonance (ECR) technique. The electron yield was found to be decrease at increasing CH₄ flow. Fitting curves to the experimental data showed that the surface CH₄ impurities played the major role in emission quenching. Atemperature effect was observed in which a 4.2 K sample was much more sensitive to CH₄ doping than a 1.6 K one. Based on the experimental results, a model was proposed of the surface sites where electrons escape the solid.