Physicist; Professor of Experimental Physics at the University of Melbourne, Australia (1973-2000); Professorial Fellow in Physics there after his retirement in 2001; has published widely in the fields of nuclear physics and particle physics. Fulbright Research Associate at the University of Pennsylvania, 1961-64; research associate at Rutherford High Energy Laboratory UK, 1970-71; visiting professor at the University of British Columbia, 1976-77 and the University of Washington Seattle, 1990. Research interests in experimental and theoretical investigations of properties of nuclei, atoms, optics, neutron physics, elementary particles and gravitation.