Abstract
IN previous papers we have shown that hydrogen nuclei are ejected from the elements boron, nitrogen, fluorine, sodium, aluminium, and phosphorus by bombardment with particles. In these experiments the material subjected to the bombardment was placed immediately in front of the source of particles and observations of the ejected particles were made on a zinc sulphide screen placed in a direct line a few centimetres away. The ranges of the H particles were in all the above cases greater than the range (30 cm. in air) of free H nuclei set in motion by particles, so that, by inserting absorbing screens of 30 cm. air equivalent in front of the zinc sulphide screen, the results were made independent of the presence of hydrogen as an impurity in the bombarded material.
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RUTHERFORD, E., CHADWICK, J. The Bombardment of Elements by -Particles. Nature 113, 457 (1924). https://doi.org/10.1038/113457a0
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DOI: https://doi.org/10.1038/113457a0
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