Ellen Gleditsch: Pioneer Woman in Radiochemistry

We present the life and work of the Norwegian scientist Ellen Gleditsch (1879-1968) in the early era of radioactivity. From 1907-1912, Gleditsch worked as Marie Curies assistant in the Laboratoire Curie in Paris on the alleged copper-lithium radioactive transformation and on the radiumuranium ratio, as well as studying chemistry and related subjects at the Sorbonne. Later,in 1913-1914, she worked in Bertram Boltwoods laboratory at Yale University on the half-life of radium. Gleditsch also was concerned with academic opportunities for women, and she became the president of the International Federation of University Women. As a professor, the second female professor in Norway, she initiated a research group on radioactivity at the University of Oslo.