Abstract The charging dynamics of ice particles in plasmas (e.g. for planetary ring dynamics) is highly dependent upon the secondary-electron yields of the ices. To this end, the secondary-electron yields of H2O, CO2, NH3 (ammonia) and CH3OH (methanol) ices have been measured in a scanning electron microscope as a function of the electron-beam energy in the 2–30 keV energy range. Estimates are given for the maximum secondary-electron yield Y max of each ice and the energy E max at which this maximum yield occurs and the implications of these estimates are discussed in terms of solar system ices. Based on these results and a general literature review of Y max values for nonconducting materials, it is suggested that a typical range to quote for the secondary-electron yield of ices should be about 1–10. This is much lower than the range of 1–30 that is presently quoted in the space physics community.
Secondary-electron yields of solar system ICES
Advances in Space Research ; 13 , 10 ; 183-187
1993-01-01
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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