William Aaron Nierenberg (February 13, 1919 – September 10, 2000) was an American physicist who worked on the Manhattan Project and was director of the Scripps Institution of Oceanography from 1965 through 1986. He was a co-founder of the George C. Marshall Institute in 1984.
Nierenberg was born on February 13, 1919, at 213 E. 13th Street, on the Lower East Side of New York, the son of very poor Jewish immigrants from Austro-Hungary. He went to Townsend Harris High School and then the City College of New York (CCNY), where he won a scholarship to spend his junior year abroad in France at the University of Paris. In 1939 he participated in research at Columbia University, where he took a course in statistical mechanics from his future mentor, I. I. Rabi. He went on to graduate work at Columbia, but from 1941 spent the war years seconded to the Manhattan Project, working on isotope separation, before returning to Columbia to complete his PhD.
In 1948 Nierenberg took up his first academic staff position, as Assistant Professor of Physics at the University of Michigan. From 1950 to 1965 he was Associate and then Professor of Physics at the University of California, Berkeley, where he had a very large and productive low energy nuclear physics laboratory, graduating 40 PhD’s during this time and publishing about 100 papers. He was responsible for the determination of more nuclear moments than any other single individual. This work was cited when he was elected to the National Academy of Sciences in 1971.