Referenced Items are not available for this document.
Measurements of quantum efficiency to heavy charged particles, in particular to the proton, in the range of 5 to 2 MeV were made with windowless electron multipliers Qn cathodes of beryllium oxide and aluminum oxide. The effects of oxide thickness on quantum efficiency were determined and some qualitative explanations have been made based on the simple ionization process and escape probability of produced electrons. Using a Van de Graaff accelerator at beam currents of lnA to 5nA, precisions of measurement of better than 10% were obtainable with six different cathodes: three different thicknesses of BeO and three of Al2O3 respectively.
Published in:
Nuclear Science, IEEE Transactions on
(Volume:22
,
Issue:
1
)
Date of Publication: Feb. 1975
- Page(s):
- 121 - 126
- ISSN :
- 0018-9499
- Digital Object Identifier :
- 10.1109/TNS.1975.4327628
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 12 November 2007
- Issue Date :
- Feb. 1975
- Sponsored by :
- IEEE Nuclear and Plasma Sciences Society
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