For his pivotal role in the application of neutron reflectivity and small angle neutron scattering to polymer science and his important work on behalf of the neutron scattering community.

For his seminal contributions to the observation of the fundamental quantum- mechanical nature of spins through the effects of rotation and the gravitational field, using neutron interferometry, including the observation of the Aharonov- Casher effect, for his extensive work with neutron scattering on the magnetic properties of transition metals and their alloys, for his critical

For leadership in the development, application and establishment of neutron reflectometry as an essential measurement tool for nanoscale materials