1990: Jointly to Jerome I. Freidman, Henry W. Kendall, and Canadian Richard E. Taylor for their pioneering investigations concerning deep inelastic scattering of electrons on protons and bound neutrons, which have been of essential importance for the development of the quark model in particle physics.;

1991: No American winner.

1992: No American winner.

1993: Russell A. Hulse and Joseph H. Taylor Jr. for the discovery of a new type of pulsar, a discovery that has opened up new possibilities for the study of gravitation.

1994: For pioneering contributions to the development of neutron scattering techniques for studies of condensed matter, Canadian Bertram N. Brockhouse for the development of neutron spectroscopy, and Clifford G. Shull for the development of the neutron diffraction technique.

1995: For pioneering experimental contributions to lepton physics, Martin L. Perl for the discovery of the tau lepton, and Frederick Reines, for the detection of the neutrino.

1996: David M. Lee, Douglas D...