Samuel Isaac Weissman

Samuel Isaac Weissman (; June 25, 1912 – June 12, 2007) was an American chemist and professor best known for his work on the application of electron spin resonance (ESR) to chemistry.

Biography Weissman was born in South Bend, Indiana in 1912. He completed a chemistry degree at the University of Chicago in 1933 and his doctorate from the same university in 1938.

Weissman was working on a project on fluorescent energy transfer, which later led to some rare-earth lasers, at the University of California, Berkeley when he was asked to join the Manhattan Project developing atomic weapons in 1943. Weissman retired from Washington University in 1980