National Museum of Nuclear Science & History
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.
Alfred Nier (1911 – 1994) was an American physicist. Nier was a pioneer in the field of mass spectrometry.
