An improved test of the exponential decay law

We have compared the decay rate of freshly prepared 40K to that of 40K that is >4.5 × 10 9 years old. We find that to within the experimental uncertainly of ± 11%, the decay rates are the same. This indicates that the exponential nature of the decay law is valid down to time-scales of approximate...

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Bibliographic Details
Published in:Physics letters. B 1995-09, Vol.357 (4), p.521-525
Main Authors: Norman, Eric B., Sur, Bhaskar, Lesko, K.T., Larimer, Ruth-Mary, DePaolo, Donald J., Owens, Thomas L.
Format: Article
Language:English
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Summary:We have compared the decay rate of freshly prepared 40K to that of 40K that is >4.5 × 10 9 years old. We find that to within the experimental uncertainly of ± 11%, the decay rates are the same. This indicates that the exponential nature of the decay law is valid down to time-scales of approximately 10 −10 t 1 2 .
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(95)00818-6