Frederick Reines, American Physicist
Frederick Reines (March 16, 1918 - August 26, 1998) was an American physicist. A graduate of the Stevens Institute of Technology and NYU, Reines joined the Manhattan Project's Los Alamos Laboratory in 1944, working in the Theoretical Division. He participated in a number of nuclear tests, culminating in his becoming the director of the Operation Greenhouse test series in the Pacific. In 1951 he met Clyde Cowan and they began their search for the neutrino. The Cowan-Reines neutrino experiment confirmed the existence of the antineutrino - a neutrally charged subatomic particle with very low mass. After months of data collection, they had accumulated data on about three neutrinos per hour in their detector. To be absolutely sure that they were seeing neutrino events from the detection scheme described above, they shut down the reactor to show that there was a difference in the number of detected events. Reines dedicated the major part of his career to the study of the neutrino's properties and interactions, which work would influence study of the neutrino for many researchers to come. He was awarded the 1995 Nobel Prize in Physics for his co-detection of the neutrino. He died after a long illness in 1998 at the age of 80. No photographer credited, undated
