Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8132644 | Astroparticle Physics | 2018 | 5 Pages |
Abstract
We report on finding no correlation between the two strongest observed Solar flares in September 2017 and the decay rates of 60Co, 44Ti and 137Cs sources, which are continuously measured by two independent NaI(Tl) detector setups. We test for variations in the number of observed counts with respect to the number of expected counts over multiple periods with timescales varying from 1 to 109Â h around the Solar flare. No excess or deficit exceeds the 2Ï global significance. We set a conservative lower limit on the decay rate deviation over an 84Â h period around the two correlated Solar flares in September 2017 to 0.062% with 2Ï confidence. A fractional change of â¼0.1% in the decay rate of 54Mn over a period of 84Â h was claimed with 7Ï significance during multiple Solar flares in December 2006. We exclude such an effect at 4.7Ï significance.
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Authors
J.R. Angevaare, L. Baudis, P.A. Breur, A. Brown, A.P. Colijn, R.F. Lang, A. Massafferri, J.C.P.Y. Nobelen, R. Perci, C. Reuter, M. Schumann,