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Nature 453, 864-865 (12 June 2008) | doi:10.1038/453864a; Published online 11 June 2008
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Nuclear physics: A neutrino's wobble?
Philip M. Walker1
Abstract
Periodic oscillations have been observed in what should be straightforward exponential decay curves of two radioactive isotopes. An entirely mysterious phenomenon, its proposed cause seems equally exotic.
It is a well-established fact that the rate at which a collection of radioactive atoms decays itself decays exponentially over time. It's easy to see why: the number of decays is directly proportional to the number of radioactive atoms remaining in the sample; so the fewer active atoms there are left, the fewer decays will occur.
- Philip M. Walker is in the Department of Physics, University of Surrey, Guildford GU2 7XH, UK.
Email: p.walker@surrey.ac.uk
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