Shu Hayama

X-ray emission spectroscopy (XES), Resonat X-ray emission (RXES) and Extended X-ray Absorption Fine Structure (EXAFS) are powerful techniques with which to study the local electronic and geometric structures around the absorbing atom. I am using these techniques to establish the electrical and structural changes that take place around cations and anions in liquids and various materials as a function of pressure and temperature.  In particular I'm interested in using XES to shed new light on the charge transfer process and mixed valence states that exist in liquids & amorphous materials.

1. "Photoluminescence studies of implantation damage centres in 30Si", Hayama S, Davies G., and Itoh KM, Journal of Applied Physics Letters, 96, 1754 (2004)
2. "Liquid-liquid phase separation and microscopic structure in rubidium-ammonia solutions observed using X-ray absorption spectroscopy", Wasse JC, Hayama S, Skipper NT, Morrison D, Bowron DT, Journal of Physical Chemistry B, 107, 14452-14456 (2003)
3. "X-ray diffraction studies of solutions of lithium in ammonia: The structure of the metal-nonmetal transition", Hayama S, Skipper NT, Wasse JC and Thompson H, Journal of Chemical Physics, 116, 2991-2996 (2002)
4. "Structure of a metallic solution of lithium in ammonia", Wasse JC, Hayama S, Skipper NT and Fischer HE. Physical Review B, 61, 11993-11997 (2000)

Shusaku Hayama is Beamline Scientist on the Versatile X-ray Absorption Spectroscopy beamline I20. Before joining Diamond, he was a beamline scientist at the Synchrotron Radiation Source (SRS), UK where he assisted in maintaining and operation of Station 9.3: Fast X-ray Absorption Spectroscopy and Station 16.5: Ultra-dilute X-ray Absorption Spectroscopy. His previous areas of study include semiconductor physics and structure determination of liquid metals and non-aqueous solutions.