Contact Info

Adam P. Hitchcock

Canada Research Chair

in Materials Research
CLS-CCRS
B.I.M.R
McMaster University
Hamilton, ON
Canada L8S 4M1
V: +1 905 525-9140
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F: +1 905 521-2773
E: aph@mcmaster.ca
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X-ray standing wave study of Cl/Ge(111)

WHO:  Peter Brodersen, Tolek Tyliszczak, BIMR, McMaster University;
              Zheng Hong Lu (Toronto); Joe Woicik (NIST)

WHERE:  Double Crystal beamine of CSRF, Synchrotron Radiation Centre, Madison, WI

WHEN:   22 Jan 1999    POSTED:  17 Feb. 1999, updated 04-dec-00 (aph)

WHAT:  Monchromated X-rays incident at specific angles on a single crystal, such as electronic grade germanium, establish a standing wave. As the photon energy is scanned the position of the maxima and minima in this standing wave systematically move relative to surface atoms and the X-ray absorption by those atoms is strongly affected. Changes in the energy and the phase of the standing wave signal with different detection (TEY (total electron yield) = surface; FY (fluorescence yield) = bulk) or with changes in the Cl adsorbate position give detailed information about the surface structure. To our knowledge this is the first example of an X-ray standing wave study at SRC.
 

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web site by Christopher Amis. Last updated on 22-Aug-2002 (aph)