Abstract
THE mean energy of the β-rays from radium E can be evaluated either by integration of the continuous spectrum of the electrons emitted by the source or by a calorimetric measurement. The calorimetric method permits the determination of the energy of the electrons independently of the secondary processes which take place while they are going through matter, and furthermore with practically the same precision for both slow and fast particles. It is, on the other hand, necessary to know for a given source the number of atoms which disintegrate per second and also the number of electrons emitted by each disintegrating atom.
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LECOIN, M., ZLOTOWSKI, I. Microcalorimetric Measurement of the Mean Energy of Disintegration of Radium E. Nature 144, 440–441 (1939). https://doi.org/10.1038/144440a0
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DOI: https://doi.org/10.1038/144440a0
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