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Alan Watson

Watson completed his PhD at the University of Edinburgh in 1964 and moved to Leeds as a lecturer that year, changing his research field from the condensation of water vapour to high energy cosmic rays.  He joined J G Wilson’s group working on the Haverah Park air-shower array which was for some years the largest instrument of its kind in the world.  Watson was promoted to a readership in Particle Cosmic Physics in 1976 and became director of the Haverah Park project in that year upon the retirement of J G Wilson.  He was given a personal chair in 1984.  The Haverah Park work ended in 1987 and Watson then led a group, jointly with a team from the University of Delaware, to search for γ-rays of 1014 eV from the supernova SN1987A at the South Pole.  In 1991 he joined forces with the Nobel Laureate James Cronin to establish the Pierre Auger Observatory in Argentina.  This device is dedicated to the study of the highest energy cosmic rays with unprecedented precision and remains the largest and most effective instrument in the field.  It is located in Western Argentina and covers an area of 3000 km2, roughly the area of West Yorkshire.  One of the major detectors at this Observatory is based on the design used at Haverah Park.  The Pierre Auger Observatory is a collaboration of ~ 300 scientists from 17 countries and is expected to operate until 2023.

Watson was elected to the Royal Society in 2000.

Denis Grieg

Head of Condensed Matter Physics 1987-96, and now Research Professor in Physics.

Denis Greig is a graduate of the University of St Andrews with a degree in Natural Philosophy (the original name for Physics), and a PhD from the University of Aberdeen. After a brief spell as an Assistant Lecturer at Aberdeen he spent two years as a PDRA in the Low Temperature and Solid State Physics Group of the National Research Council of Canada. Thereafter he joined the University of Leeds progressing 'through the ranks' as lecturer, senior lecturer, Reader and Professor. He is currently a member of the Project Management Committee of one of the UK beamlines (XMaS) on the European Synchrotron in Grenoble, and an Adjunct Professor at Michigan State University.

Professor Greig is the author or co-author of over 150 papers on the electrical and thermal properties of a wide variety of materials -- crystalline and amorphous metals and alloys, semiconductors, superconductors and polymers, particularly at low temperatures. Current work includes the study of magnetic materials in the form of bulk amorphous alloys and thin magnetic films.  In addition to basic measurements such as magnetisation, this research has made use of a variety of spectroscopic techniques designed to probe the origins of magnetism in multi-element alloys and ferromagnetic/spin-glass bilayers. Techniques include photoemission (UV and X-ray), magnetic Compton scattering, neutron and X-ray diffraction, magnetic X-ray dichroism (MXCD) and Mossbauer spectroscopy, with collaborations both within the group and with collaborators at the Universities of Liverpool, Salford, Warwick, Western Australia and York.  Recent research of a completely different type has been a series of projects on ophthalmology in collaboration with one of the consultants at St James's University Hospital.