Oral Histories

Philippe Halban is a European biologist. His father, Hans Halban, was an eminent physicist who conducted nuclear research with Frédéric Joliot-Curie in France in the years leading to World War II and then in England and Canada as part of the Anglo-French nuclear effort. In this interview, Philippe provides an account of his father’s life, including Halban’s family, education, and love of science. He discusses his father’s relationships with fellow scientists, including Francis Perrin, Lew Kowarski, and Joliot-Curie. He also describes how his father and Kowarski fled France for England in June 1940 with France’s supply of heavy water to keep it out of the hands of the Nazis.

Lew Kowarski was a Russian-born French physicist who worked as part of the team that discovered that neutrons were emitted in the fission of uranium-235 in the 1930s, setting the groundwork for the use of nuclear chain reactions in the design of the atomic bomb. After the Second World War, Kowarski went on to supervise the first French nuclear reactors and became a staff member of the European Organization for Nuclear Research, or CERN, in 1953. In this interview Kowarski discusses his upbringing in Russia, and the beginnings of his scientific career under Frédéric Joliot-Curie. He also outlines the process through which the splitting of uranium atoms was realized.

In this interview, Alex Wellerstein, a historian of science and founder of “Restricted Data: The Nuclear Secrecy Blog,” discusses the basic science behind the atomic bomb and explains the difference between the uranium “Little Boy” bomb that was dropped on Hiroshima and the plutonium “Fat Man” bomb that was dropped on Nagasaki in August 1945. He also discusses Britain’s contribution to the Manhattan Project and provides a brief history of the German and Soviet atomic programs. Wellerstein also discusses the effects of nuclear fallout, including the short and long-term threats posed by radiation.