Gabriel Karl

Gabriel Karl

University Professor Emeritus

Contact Information

Telephone: 519-824-4120 x53852


Office: MacN 433A


  • 1958 - University of Cluj (Romania); Diploma(de merit) in Chemistry
  • 1964 - University of Toronto: PhD in Physical Chemistry.  Supervisor J.C. Polanyi
  • 1964-1966 - University of Toronto: Physics Postgraduate.  Supervisors J. VanKranendonk and J.D. Poll
  • 1966-1969 - Oxford University: High Energy Physics Postgraduate.  Supervisor R.H. Dalitz


  • 1969-2002 - University of Guelph, Department of Physics


  • 1966 - Ramsay Fellow in Chemistry (England) 
  • 1966-1968 - NRC overseas Post Doctoral Scholarship 
  • 1983 - Royal Society of Canada, Fellow 
  • 1991 - Canadian Association of Physicists Medal of Achievement 
  • 1992 - Alexander von Humboldt Prize(Germany) 
  • 2003 - University Professor Emeritus,University of Guelph 

Research Highlights:

  • 1962 - First observation of electronic to vibrational energy transfer;  with J.C. Polanyi
  • 1965 - Computation of the complete vibrational spectrum of Hydrogen;  with J.D. Poll
  • 1969 - Computation of the helicity structure of pion photo-production from nucleons;  with L.A. Copley and E. Obryk
  • 1978-1981 - QCD inspired quark model for baryons;  with Nathan Isgur (these papers are most cited among my publications, two papers with over 1000 citations each, and several other papers with lower citations)
  • 1975 - Energy bounds in electron positron annihilation to pions;  with J.S. Bell and C.H.L. Smith
  • New Classical Variational principles;  with V. Novikov and C. Gray
  • Approximately 100 total refereed publications with 6000 citations (Google Scholar)

Retirement Research:

  • At present, my research is limited to molecular collisions

Spectroscopy of hadrons and especially the spectroscopy of baryons using quark models with input from quantum chromodynamics. The behaviour of chromodynamics and the quark models in the limit of large numbers of colours. The behaviour of baryons and especially nucleons inside nuclear matter. Magnetic moments of baryons when free and when inside nuclear matter. Exotic forms of hadronic matter such as gluonia, multiquark hadrons and hybrid hadrons with quarks and gluons. Simple reaction mechanisms in hadronic physics involving quarks and gluons, especially in exclusive processes. The behaviour of cross sections of simple processes as a function of energy and angular momentum.
More general issues in theoretical physics which are investigated include parity violations in atoms and nuclei, parity violation in the propagation of neutrons through matter, the ground state of magnetic lattices and similar lattices of multipoles, the validity of the adiabatic approximation at short internuclear distances in molecules, Variational Principles in Classical and Quantum Mechanics.

KEYWORDS: Theoretical particle physics, theoretical nuclear physics, general issues in theoretical physics.