Liberation of Neutrons from Beryllium by X-Rays: Radioactivity Induced by Means of Electron Tubes

@article{Brasch1934LiberationON,
  title={Liberation of Neutrons from Beryllium by X-Rays: Radioactivity Induced by Means of Electron Tubes},
  author={Arno Brasch and F. Lange and Amira Waly and Thurston E. Banks and T. A. Chalmers and Leo Szilard and F. Ll. Hopwood},
  journal={Nature},
  year={1934},
  volume={134},
  pages={880-880}
}
IT has been recently reported1 that neutrons are liberated from beryllium by γ-rays of radium and that these are able to induce radioactivity in iodine. Following up this work, we have attempted to liberate neutrons from beryllium by means of hard X-rays, produced by high-voltage electron tubes. An electron tube, which could conveniently be operated by a high-voltage impulse generator at several million volts2, is at present in use in the High Tension Laboratory of the A.E.G. in Berlin, and has… 
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Detection of Neutrons Liberated from Beryllium by Gamma Rays: a New Technique for Inducing Radioactivity

We have observed that a radiation emitted from beryllium under the influence of radium gamma rays excites induced radioactivity in iodine, and we conclude that neutrons are liberated from beryllium

Chemical Separation of the Radioactive Element from its Bombarded Isotope in the Fermi Effect

Following the pioneer experiment of Fermi, it has been found by Fermi, Amaldi, D'Agostino, Rasetti and Segrè that many elements up to the atomic number 30, when bombarded by neutrons from a