Mark Oliphant

Sir Marcus 'Mark' Laurence Elwin Oliphant (October 8, 1901 - July 14, 2000), Australian physicist and politician.

Born in Kent Town, a suburb of Adelaide, South Australia. He attended the University of Adelaide in 1919 studying physics after being inspired by a particularly good lecturer.

In 1925 he heard a speech given by phyicist Ernest Rutherford and decided there and then that he would work for him an ambition he fulfilled by gaining a position the Cavendish Laboratory in Cambridge in 1927 which was at the time carrying out the most advanced research into nuclear physics in the world. It was at Cavendish, for example, that the atom was first split in 1932.

Oliphant's contribution to this work was his discovery of helium 3 and tritium. He was also the first to discover heavy hydrogen nuclei could be made to react with each other. This reaction is the basis of a hydrogen bomb. Ten years later American scientist Edward Teller would press to use Oliphant's discovery in order to build one.

Oliphant too worked on the Manhattan Project as part of the British delegation. At the outbreak of war Oliphant was sent to the United States as part of the British team that helped to set up the Radiation Lab at Berkeley which eventually devised a system of microwave radar, improving on the work of Robert Watson-Watt in England. In 1943 he went to Los Alamos to assist on the bomb project but the work made him uneasy and he preferred to concentrate on processes for refining Uranium 235 at Berkeley with his friend Ernest Lawrence; a vital but less overtly military part of the project. After the war Oliphant was a harsh critic of nuclear weapons and a member of the Pugwash Conferences on Science and World Affairs. His wartime work would have earned him a Congressional Medal of Freedom with Gold Palm but the Australian government vetoed the honour.

He returned to England in April 1945 and after VE-Day took up a post as Professor of Physics at the University of Birmingham but in 1950 he returned to Australia as first Director of the ANU Research School of Physical Sciences at the new Australian National University where first designed what is now known as the rail gun as a scientific instrument. He established the Australian Academy of Sciences in 1954 and was its first President until 1956. After retiring from the University in 1967, Oliphant was invited to become State Governor of South Australia, a position he held from 1971 to 1976.

He died in Canberra in 2000 at the age of 99. Both the Mark Oliphant Conservation Park and the Oliphant wing of the Physics Building at the University of Adelaide are named in his honour.

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