Comment on "Investigation of scandate cathodes: emission, fabrication, and activation processes" by J.W. Gibson et al

Critical comments are made on the experimental results for zero field current density j/sub 0/ and work function obtained by J.W. Gibson et al. (ibid., vol.36, no.1, p.209-14, 1989) on top-layer scandate cathodes and on an emission model proposed for them. It is shown, for example, that the determination of j/sub 0/ gives rise to erroneous results.<
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