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  Item Reference: KCLCAL-1970-1971-458

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Annual Report of the Delegacy lxxxiii Research Considerable activity in all groups continued and there were nearly forty original publications from the department during the year Professor Price continued to develop the new field of photo- electron spectroscopy and his group commissioned new high-reso- lution hemispherical analyser for this work The theoretical group under Professor Domb extended its statistical studies of critical pheno- mena and Dr Martin continued to use computer techniques in the evaluation of various co-operative phenomena Dr Wilkinson made extensive investigations on crystals by laser Raman and far-infra- red techniques and Dr Sherman made infra-red studies on im- purity centres in these materials under extremely high pressures Dr Lightowlers and Dr Collins investigated photoconductivity in GaP SiC and Si and luminescence associated with Zn in GaP They also worked on the electrical transport properties of natural and synthetic diamond cathodoluminescent effects in silicon and the spectroscopic properties of point defects in magnesium oxide At the Rutherford Laboratory Dr Griffiths directed large and very active nuclear physics group part of which he took over from Pro- fessor Burge and part of which he brought with him from West- field College He was assisted on the theoretical side by Dr Edwards They were concerned with elucidating the structure of nuclei by bombarding them with high-energy protons Their work is being transferred from the proton linear accelerator to the Harwell variable-energy cyclotron Dr Chapman's radio physics group developed new methods for locating sources of atmospherics from observations of resonances between the ground and the ionosphere Theoretical studies based on data obtained by the group revealed new information on the propa- gation of and radio waves Simultaneous observations made in Cornwall and Surrey on 'whistlers' generated by lightning using novel techniques led to better understanding of their origin and propagation The investigation of geomagnetic micropulsations revealed strong correlation of their energy density with the plane- tary magnetic index Dr Jones maintained his collaboration with the group during his absence in the United States and continued his studies on ionospheric cavity resonances atmospherics and low- frequency propagation Mr Curling collaborated with the Electrical Engineering department on the automatic focusing of elec- tron microscopes Conferences visits lectures etc These are too numerous to enumerate
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