National Museum of Nuclear Science & History
Thomas Braswell worked on the assembly line for Mallinckrodt Chemical, a civilian contractor for the Manhattan Project in St.
Hans von Halban (1908-1964) was an Austrian born French physicist. He finished his studies in 1934. He joined nuclear physicist Niels Bohr in Copenhagen, where he and Otto Frisch discovered that heavy water had very little neutron absorption compared to normal water.
