The Reflection of Slow-Moving Electrons by Copper
1916; American Institute of Physics; Volume: 7; Issue: 1 Linguagem: Inglês
10.1103/physrev.7.1
ISSN1536-6065
Autores Tópico(s)Molecular Junctions and Nanostructures
ResumoI ^HE following is a report of experiments on the reflection by a rough -*• copper surface-electrons having velocities from 0.4 volt to 50 volts.The copper was originally polished, but when taken out at the end of the experiment had a dull, smooth gray appearance, due probably to a deposit on it of copper distilled from hotter parts of the apparatus during the prolonged heating.This condition of the surface is to be especially borne in mind in interpreting the results.The most striking result of the experiment is the smallness of the reflection observed-only 10 per cent, at 0.4 volt velocity, increasing to 40 per cent, at 50 volts velocity.Interesting evidence is also obtained regarding the cause of the spreading of a beam of slow-moving electrons, and the energy relations in the production of delta rays.
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