John Robert de Laeter (3 May 1933  16 August 2010) researched nuclear physics at McMaster University and his scientific interests were broad he also refined the isotopic composition of elements..
John Robert de Laeter, AO, FTSE, FAIP (3 May 1933  16 August 2010) was an Australian scientist with a distinguished career across several fields in nuclear physics, cosmochemistry, geochronology, isotope geochemistry. After researching nuclear physics at McMaster University in Canada on a National Research Council of Canada Fellowship, de Laeter returned to Australia in 1968 as inaugural head of the Department of Physics at West Australian Institute of Technology (the predecessor of Curtin University). De Laeter's scientific interests were broad, but centred on the application of mass spectrometry techniques in cosmochemistry and nuclear physics. He is credited with refining the isotopic composition and atomic weight measurements of elements, including antimony, barium, tin and ytterbium. 
