Energy Distribution of Secondary Electrons From Copper-Beryllium Alloy by Positive Ions of Inert Gases. I. Electropolished Surface
The distribution curves of the kinetic energies of the secondary electrons from an electropolished copperberyllium surface bombarded by inert gas ions were measured by the retarding potential method together with the yield of the secondary electron emission. The contact potential difference between the ion target (electropolished copper-beryllium) and the electron collector (gold) was also measured by the retarding potential method for the thermal electrons from tungsten, and the correction of this contact potential difference was made for the kinetic energies of secondary electrons. The contact potential difference between gold and electro-polished copperberyllium (4%) is 0.95 ev. The resuits of the energy distribution curves of secondary electrons indicate that the yield of secondary electrons is increased by increasing the kinetic energy of the primary ions, and that this increment in the yield is mainly contributed from the secondary electrons which have lower kinetic energies than that of the secondary electrons emitted by incident ions of low kinetic energies. The total number of emitted electrons is increased with the increase in the value of the ionization potential of incident ions, and the kinetic energies of emitted electrons become greater by increasing the potential energy of incident ions. In contrast with the singly-charged ions, the doubly-charged ions give rise to the broadening of the energy distribution curves. (auth)
- Research Organization:
- Univ. of Osaka Prefecture
- NSA Number:
- NSA-16-007972
- OSTI ID:
- 4818184
- Journal Information:
- Bull. Chem. Soc. Japan, Journal Name: Bull. Chem. Soc. Japan Vol. Vol: 34
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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