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Production of Mg and Al Auger electrons by noble gas ion bombardment of Mg and Al surfacesRelative production efficiencies of Mg and Al Auger electrons by He, Ne, Ar, Kr, and Xe ion bombardment are reported as a function of ion energy for energies not exceeding 3 keV. The experimental apparatus employed consisted of a LEED-Auger system equipped with an ion gun and a four-grid retarding-potential analyzer. It is found that: (1) the shape of the ion-excited Auger signal was independent of the rare gas and quite symmetric; (2) the Al signal was about an order of magnitude smaller than the Mg signal for a given bombarding species and ion-gun voltage; (3) no signal was observed for He(+) bombardment under any of the experimental conditions; (4) signal strengths were independent of temperature and ion dose; (5) the Auger production efficiencies differed by no more than a factor of two among the different gases - except for He(+) - on a given metal; (6) all the signal strengths increased with increasing ion-gun voltage, with no maximum exhibited; and (7) the apparent threshold energy for the Al signal was higher than that for the Mg signal. The differences between the results for the two metals are attributed to the fact that the Al 2p orbital lies deeper in energy and closer to the nucleus than the corresponding Mg orbital.
Document ID
19770027682
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ferrante, J.
(NASA Lewis Research Center Cleveland, OH, United States)
Pepper, S. V.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
August 1, 1976
Publication Information
Publication: Surface Science
Volume: 58
Issue: 2, Au
Subject Category
Atomic And Molecular Physics
Accession Number
77A10534
Distribution Limits
Public
Copyright
Other

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