Conservation of Energy in Radiation Processes

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AT the beginning of this year, R. Shankland1 reported experiments on the Compton effect which indicated a breakdown of the conservation laws in radiation processes and a reversal to the type of theory put forward by Bohr, Kramers and Slater in 1924. According to the latter, light-quanta have no existence, and energy is only statistically conserved in the interaction of matter and radiation. In view of the difficulties of accepting Shankland's results—it was pointed out by one of the present writers in an earlier note2 that they ” run counter to the Uncertainty Principle”—we have carried out certain experiments with a view of testing further the points at issue.

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  1. 1

    Phys. Rev., 49, 8 (1936).

  2. 2

    NATURE, 137, 614 (1936).

  3. 3

    Bothe and Maier-Leibnitz, Göttingen Nacht., 10, 127 (1936).

  4. 4

    C. Jacobsen, NATURE, 138, 25 (1936). Present results were reported at Physics Conference, Zurich, July 1.

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