An analog technique for the measurement of Auger electron currents: Application to sulfur on Ni(110)
作者:
L. C. Isett,
J. M. Blakely,
期刊:
Review of Scientific Instruments
(AIP Available online 1974)
卷期:
Volume 45,
issue 11
页码: 1382-1385
ISSN:0034-6748
年代: 1974
DOI:10.1063/1.1686507
出版商: AIP
数据来源: AIP
摘要:
The conventional potential modulation technique employed in Auger electron spectroscopy measures the derivative of the electron energy distribution (d N / d E). A technique is described for recovering the energy distribution itself and the area under an Auger feature via electronic integration of the measured signal. This integration is conveniently performed using operational amplifier technology. This technique is demonstrated in a retarding field analyzer in the particular case of sulphur in ac(2×2) structure on a Ni(110) surface. The measured area under the sulphur Auger peak follows the square law dependence on oscillator modulation amplitude predicted by Houston. A quantitative comparison is made between the sulphur Auger signal strength, as measured by the area under the Auger peak, and that predicted by the calibration performed by Perdereau for this system. The sulphur (L2,3VV) Auger peak shape in theN(E) spectrum, as obtained by integration, was found to be in good agreement with that observed by other workers.
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