Power Spectrum Analysis of Physikalisch-Technische Bundesanstalt Decay-Rate Data: Evidence for Solar Rotational Modulation
| Autor: | J. B. Buncher, J. T. Gruenwald, Ephraim Fischbach, J. J. Mattes, J. R. Newport, Jere H. Jenkins, R. H. Lee, D. Javorsek, Peter A. Sturrock |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Physics - Instrumentation and Detectors 010308 nuclear & particles physics Synodic day Solar neutrino Spectral density FOS: Physical sciences Astronomy and Astrophysics Instrumentation and Detectors (physics.ins-det) Solar physics Rotation 01 natural sciences 7. Clean energy Nuclear physics Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science 0103 physical sciences Radiative transfer Solar rotation Nuclear Experiment (nucl-ex) Nuclear Experiment 010303 astronomy & astrophysics Smoothing Solar and Stellar Astrophysics (astro-ph.SR) |
| DOI: | 10.48550/arxiv.1010.2225 |
| Popis: | Evidence for an anomalous annual periodicity in certain nuclear decay data has led to speculation concerning a possible solar influence on nuclear processes. We have recently analyzed data concerning the decay rates of Cl-36 and Si-32, acquired at the Brookhaven National Laboratory (BNL), to search for evidence that might be indicative of a process involving solar rotation. Smoothing of the power spectrum by weighted-running-mean analysis leads to a significant peak at frequency 11.18/yr, which is lower than the equatorial synodic rotation rates of the convection and radiative zones. This article concerns measurements of the decay rates of Ra-226 acquired at the Physikalisch-Technische Bundesanstalt (PTB) in Germany. We find that a similar (but not identical) analysis yields a significant peak in the PTB dataset at frequency 11.21/yr, and a peak in the BNL dataset at 11.25/yr. The change in the BNL result is not significant since the uncertainties in the BNL and PTB analyses are estimated to be 0.13/yr and 0.07/yr, respectively. Combining the two running means by forming the joint power statistic leads to a highly significant peak at frequency 11.23/yr. We comment briefly on the possible implications of these results for solar physics and for particle physics. Comment: 15 pages, 13 figures |
| Databáze: | OpenAIRE |
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