On the surface morphology of thin alkali halide photocathode films

Authors
Boutboul, T Breskin, A Chechik, R Klein, E Braem, A Lion, G Mine, P
Citation
T. Boutboul et al., On the surface morphology of thin alkali halide photocathode films, NUCL INST A, 438(2-3), 1999, pp. 409-414
Citations number
6
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
438
Issue
2-3
Year of publication
1999
Pages
409 - 414
Database
ISI
SICI code
0168-9002(199912)438:2-3<409:OTSMOT>2.0.ZU;2-R
Abstract
Thin alkali halide films are currently used as transmissive UV-photocathode s and as protecting layers for visible photocathodes. The surface morpholog y of 20 and 75 nm thick evaporated CsI, NaI and CsBr films was investigated by means of a scanning electron microscope, to which the samples were tran sferred, under vacuum, with practically no contact with air. It is shown th at the film continuity, in particular that of NaI, is strongly affected by short exposure to moisture. CsI, which is the less hygroscopic material amo ng the three, exhibits the most continuous structure. (C) 1999 Elsevier Sci ence B.V. All rights reserved.