Abstract
Hot electron distribution functions in a magnetic field are investigated in high purity n-type GaAs. The electrons are excited by d.c. electric fields and the resulting Cyclotron emission is analysed with narrowband photoconductive detectors with a resolution of 0.25cm-1. Extremely high interband electron temperatures up to 180K are observed in the E/ /B configeration indicating strong deviations from a Maxwellian type distribution function. The nonparabolicity of the conduction band is found to be considerably stronger than theoretically predicted.
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