Portal:Illinois/Selected biography/17

Leona Woods (August 9, 1919 – November 10, 1986), was an American physicist who helped build the first nuclear reactor and the first atomic bomb. Woods was born on a farm in La Grange, Illinois and earned her BS in chemistry from the University of Chicago in 1938, at the age of 19. At age 23, she was the youngest and only female member of the team which built and experimented with the world's first nuclear reactor (then called a pile ), Chicago Pile-1, in a project led by her mentor Enrico Fermi. In particular, Woods was instrumental in the construction and then utilization of geiger counters for analysis during experimentation. After the war, her research involved high-energy physics, astrophysics and cosmology. In later life she became interested in ecological and environmental issues, and she devised a method of using the isotope ratios in tree rings to study climate change. She was a strong advocate of food irradiation as a means of killing harmful bacteria. (Read more...)