ESTRO PT 2018

1903 Sir William Henry Bragg (2 July 1862 – 12 March1942)

• Experiments done for a speech • α-particle radiation from radium • Unexpected ionization pattern in-air

W.H. Bragg, R. Kleeman. On the ionization curves of radium. Philos Mag, S.6 (1904), pp. 726-738

Not the least remarkable fact about the 1904 paper was that it represented Bragg's first original experimental research after nearly two decades occupying the chair in Adelaide. The immediate stimulus for the experiment was the need to generate original material for his presidential address to the Australasian Association for the advancement of science. Brown A, Suit H. The centenary of the discovery of the Bragg peak. Radiother Oncol. 2004 Dec;73(3):265-8.