| Issue |
EPL
Volume 87, Number 3, August 2009
|
|
|---|---|---|
| Article Number | 32001 | |
| Number of page(s) | 6 | |
| Section | Nuclear Physics | |
| DOI | https://doi.org/10.1209/0295-5075/87/32001 | |
| Published online | 27 August 2009 | |
Search for correlated fluctuations in the 
decay of Na-22
Department of Physics, Trinity College - Hartford, CT 06106, USA
Corresponding author: mark.silverman@trincoll.edu
Received:
15
June
2009
Accepted:
21
July
2009
Claims for a “cosmogenic” force that correlates otherwise independent stochastic processes have been made for at least 10 years, based on visual inspection of histograms whose shapes were interpreted as suggestive of recurrent patterns. Building on our earlier work to test nuclear alpha, beta, and electron-capture decay processes for non-randomness, we searched for correlations in the time series of 
annihilations deriving from the 
decay of 22Na. Coincident gamma photons were counted within narrow time and energy windows over a period of 167 hours leading to a time series of more than 1 million events. Statistical tests for correlated fluctuations in the time series and its histograms were in all cases consistent with statistical control, giving no evidence of a “cosmogenic” force.
PACS: 24.80.+y – Nuclear tests of fundamental interactions and symmetries / 23.40.-s – β decay; double β decay; electron and muon capture / 02.50.Ey – Stochastic processes
© EPLA, 2009
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