Abstract
Cold electron emission was measured from untreated and heat-treated nickel electrodes in dry, oxygen-free nitrogen. The electron currents were measured in the range 103 to 4 × 104 elect/sec for electric field strengths between 9 × 104 v/cm and 3 × 105 v/cm and gas pressures of 500 to 700 torr. The results are discussed in relation to the interaction of photons, metastable molecules and positive ions with the cathode surface. It is concluded that the emission was produced by positive ions liberating electrons from the cathode, subsequent to their neutralization in Auger processes.
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