Searching for modifications to the exponential radioactive decay law with the Cassini spacecraft

Details Searching for modifications to the exponential radioactive decay law with the Cassini spacecraft Searching for modifications to the exponential radioactive decay law with the Cassini spacecraft

2008-09-24

arxiv.org/abs/0809.4248v1

Astropart.Phys.31:267-269,2009

Astronomy and Astrophysics

Astrophysics

3 pages, 3 figures, Latex

Scientific paper

10.1016/j.astropartphys.2009.02.

Data from the power output of the radioisotope thermoelectric generators aboard the Cassini spacecraft are used to test the conjecture that small deviations observed in terrestrial measurements of the exponential radioactive decay law are correlated with the Earth-Sun distance. No significant deviations from exponential decay are observed over a range of 0.7 - 1.6 A.U. A 90% Cl upper limit of 0.84 x 10^-4 is set on a term in the decay rate of Pu-238 proportional to 1/R^2 and 0.99 x 10^-4 for a term proportional to 1/R.

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