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Photoemission from thin-film lanthanum hexaboride (1990)

May, P. G. ; Petkie, R. R. ; Harper, J. M. E. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 57 (1990), S. 1584-1585

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: Lanthanum hexaboride (LaB6) is investigated for its potential as a low work-function photocathode for high brightness e-beam applications. Thin films of LaB6 at room temperature are shown to have quantum efficiencies of 0.2×10−3 at 442 nm excitation but readily form an inhibiting oxide. This oxide is easily removed by in situ 500 eV Ar+ ion sputtering, which restores photoemission for over 30 min at an oxygen partial pressure of 10−9 Torr.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.104131

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