Abstract
THE mean stopping power of liquid water averaged over the whole range has been determined for natural α-particles by Michl1 and by Philipp2. These authors find values for the molecular stopping power which are higher by about 20 and 14 per cent respectively than those predicted by the Bragg law and the accepted atomic stopping powers of hydrogen and oxygen. Philipp (loc. cit.) has also shown that the stopping power of water vapour accords with the Bragg law. The tendency among physicists has, however, been to treat the Bragg law as a more reliable guide to the stopping power of liquid water than the experiments.
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References
Michl, W., Sitz. K. Akcad. Wiss. Wien, 123 (IIA), 1965 (1914).
Philipp, K., Z. Phys., 17, 23 (1923).
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APPLEYARD, R. Stopping Power of Liquid Water for α-Particles. Nature 163, 526 (1949). https://doi.org/10.1038/163526a0
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DOI: https://doi.org/10.1038/163526a0
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