Alfred O. C. Nier (1912–1994)
Article first published online: 3 JUN 2011
©1994. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 75, Issue 22, page 249, 31 May 1994
How to Cite
1994), Alfred O. C. Nier (1912–1994), Eos Trans. AGU, 75(22), 249–249, doi:10.1029/94EO00927.(
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
- Cited By
Alfred O. C. Nier, a well-known geophysicist who is considered one of the founders of isotope geology, geochronology, and isotope geochemistry, died on May 16 after a car accident.
In 1938, Nier, working with a mass spectrometer, measured the isotopes of lead. His results allowed determination of the Earth's age at 5 b.y. In 1940 he used a mass spectrometer in his basement workshop at the University of Minnesota to identify uranium 235, a major step in the evolution of the atomic bomb. In 1943, he went to work on the Manhattan Project in Oak Ridge, Tenn., to develop the first atomic bomb.