
Bill Newton
Bill Newton (1928-2005) was a Senior Lecturer in Nuclear Chemistry at the University of Manchester from 1964 until 1988. He was leader of the Radiochemical Methods group and became heavily involved in the application of NAA to ceramics from Roman and Medieval Britain and the Levant. His laboratory produced more that 20 PhDs who used NAA in their research.

Frank Asaro
Frank Asaro (1927-2014) was a Senior Scientist who worked at the Lawrence Berkeley National Laboratory for more than 40 years applying NAA to studies of archaeological materials. His most famous work was in the collaboration with Nobel Prize winning physicist Luis Alvarez to detect the element Iridium in the boundary layer between the Cretaceous and Paleogene periods. This discovery is accepted as proof that an asteroid was responsible for the mass extinction of the dinosaurs about 66 million years ago.
