Detection of Neutrons Liberated from Beryllium by Gamma Rays: a New Technique for Inducing Radioactivity

@article{Szilard1934DetectionON,
  title={Detection of Neutrons Liberated from Beryllium by Gamma Rays: a New Technique for Inducing Radioactivity},
  author={Leo Szilard and T. A. Chalmers},
  journal={Nature},
  year={1934},
  volume={134},
  pages={494-495}
}
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 by gamma rays. 
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