Angevaare, J.R., Baudis, L., Breur, P.A. orcid.org/0000-0001-5397-5299 et al. (8 more authors) (2018) No correlation between solar flares and the decay rate of several β-decaying isotopes. Astroparticle Physics, 103. pp. 62-66. ISSN: 0927-6505
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 109 h around the Solar flare. No excess or deficit exceeds the 2σ global significance. We set a conservative lower limit on the decay rate deviation over an 84 h period around the two correlated Solar flares in September 2017 to 0.062% with 2σ confidence. A fractional change of ∼0.1% in the decay rate of 54Mn over a period of 84 h was claimed with 7σ significance during multiple Solar flares in December 2006. We exclude such an effect at 4.7σ significance.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier. This is an author produced version of a paper subsequently published in Astroparticle Physics. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Astronomical Sciences; Physical Sciences |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences |
Funding Information: | Funder Grant number Swiss National Science Foundation 175863 Swiss National Science Foundation 162501 |
Date Deposited: | 03 Oct 2025 09:16 |
Last Modified: | 03 Oct 2025 12:25 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.astropartphys.2018.07.003 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:232519 |