In the 1930s, Meitner, Hahn, and Strassmann did experiments irradiating uranium with neutrons. They…

In the 1930s, Meitner, Hahn, and Strassmann did experiments irradiating uranium with neutrons. They predicted three possible outcomes: Production of a new element (if the neutron undergoes beta decay in the nucleus). Production of a heavier isotope of uranium (if the neutron stays in the nucleus). Production of a slightly lighter nucleus (if the neutron captured by the nucleus causes one or two alpha particles to leave). Instead, the nuclei produced in the reaction included isotopes of barium and other nuclei with about half the mass of uranium. How could they explain their findings?

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