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Cavendish Laboratory : Positive ray parabolae for the isotopes of neon by Thomson and Aston

Cavendish Laboratory

<p style='text-align: justify;'>Black and white photograph of positive ray parabolae including the isotopes of neon by Thomson and Aston. See: Thomson, Phil. Mag. (6), 24, 209, 1912. These images were taken with the positive ray apparatus shown in P47. The slight separation between the parabolae for Ne20 and Ne22 represented the discovery of non-radioactive isotopes. Radioactive isotopes were already known from the work of Rutherford and his colleagues.</p>

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