Hi,
The results of both papers are addressed, to a certain extent, in
"Power Spectrum Analyses of Nuclear Decay Rates"
http://arxiv.org/abs/1007.0924
Mauro
On 09/06/2010 02:31 PM, Harry Veeder wrote:
> Here are two papers which find no evidence of periodic fluctuations in decay
> rates. Both have been published in journals since being uploaded
>
> to arxiv.org
> Harry
>
> http://arxiv.org/abs/0809.4248
>
> Searching for modifications to the exponential radioactive
> decay law with the Cassini spacecraft
> Authors: Peter S. Cooper
> (Submitted on 24 Sep 2008)
>
> Abstract: 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.
>
>
>
> http://arxiv.org/abs/0810.3265
>
> Evidence against correlations between nuclear decay rates and Earth-Sun
> distance Authors: Eric B. Norman, Edgardo Browne, Howard A. Shugart, Tenzing
> H.
> Joshi, Richard B. Firestone
> (Submitted on 17 Oct 2008)
>
> Abstract: We have reexamined our previously published data to search for
> evidence of correlations between the rates for the alpha, beta-minus,
> beta-plus,
> and electron-capture decays of 22Na, 44Ti, 108Agm, 121Snm, 133Ba, and 241Am
> and
> the Earth-Sun distance. We find no evidence for such correlations and set
> limits
> on the possible amplitudes of such correlations substantially smaller than
> those
> observed in previous experiments.
>
>
>
>
>
