AVS 45th International Symposium
    Applied Surface Science Division Tuesday Sessions
       Session AS-TuM

Paper AS-TuM2
Implementation and Application of a Ag L@sub alpha@ Monochromatic Source on a Magnetic Lens Based Spectrometer

Tuesday, November 3, 1998, 8:40 am, Room 307

Session: Sample Preparation and Tricks of the Trade
Presenter: C.J. Blomfield, Kratos Analytical Ltd, United Kingdom
Authors: C.J. Blomfield, Kratos Analytical Ltd, United Kingdom
B.J. Tielsch, Kratos Analytical Ltd, United Kingdom
S.P. Page, Kratos Analytical Ltd, United Kingdom
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High energy Ag L@sub alpha@ X-rays have several advantages over the more commonly employed Al K@sub alpha@ source. A photon energy of 2984.3 eV means that a Ag source can generate higher core levels, Auger series and has a greater excitation volume. A further advantage over other high energy sources is that the Bragg condition may be satisfied via a second order diffraction within the confines of the conventional Al K@sub alpha@ monochromator body with only minor modifications. Such an approach has previously resulted in a workable source although the sensitivity was reduced in comparison to the Al K@sub alpha @source.@footnote 1@ We have now for the first time implemented a Ag monochromator as a modification to the standard Al mono on a modern magnetic lens based electron spectrometer, the Axis Ultra. The great improvements gained in photoelectron collection efficiency by employing magnetic lens technology improves the sensitivity and ultimate usability of the Ag source making it a viable alternative for the measurement of deep 1s core levels and Auger parameters. The functionality will be demonstrated with examples of Auger parameter and high energy core level spectroscopy. @FootnoteText@ @Footnote 1@K Yates RH West Surface and Interface Analysis Vol 5 No 4 1983 133-138