Approximate June 1945 completion of Yalow’s PhD in nuclear physics at the University of Illinois, where she became only the second woman to earn a physics doctorate.
In June 1945, Rosalyn Sussman Yalow completed her PhD in nuclear physics at the University of Illinois. The date in the record is approximate rather than exact, but the accomplishment itself was unmistakable: she became only the second woman to earn a doctorate in physics at that university. That distinction reflected both her personal ability and the long-standing barriers women faced in physics graduate training during the 1940s.
Yalow’s graduate work was accomplished in a period when women in science often had to overcome skepticism, limited institutional support, and expectations that technical research careers were not “proper” careers for women. Her success at Illinois signaled that she had entered the small, still-expanding cohort of women capable of advanced experimental and theoretical work in physics. The degree also provided the foundation for her later medical physics research, where she would apply nuclear techniques to biological problems and help create radioimmunoassay.