Steinberger, Jack (1921-...), is a German-born American physicist who made a career of studying the reactions of subatomic particles. In 1960, Steinberger collaborated with a team of physicists, including Leon Lederman and Melvin Schwartz, trying to detect elusive particles known as neutrinos. Their aim was to further their study of the "weak" nuclear force that creates certain kinds of radioactivity. At the Brookhaven National Accelerator Laboratory on Long Island, New York, the team used a particle accelerator to create a high-intensity beam of neutrinos. As a result of their experiments, they discovered a second type of neutrino which is produced in reactions involving a particle called the muon. For this work, Schwartz, Lederman, and Steinberger shared the 1988 Nobel Prize for physics.