Spectral content of 22 Na/ 44 Ti decay data: implications for a solar influence
D. O’Keefe,B. L. Morreale,R. H. Lee,J. B. Buncher,Jere H. Jenkins,Ephraim Fischbach,T. Gruenwald,D. Javorsek,Peter A. Sturrock +8 more
TLDR
In this paper, a more detailed analysis of both the amplitude and phase of the Norman data was carried out, and it was shown that the Sun influences the decay rate of 22Na/44Ti, albeit weakly.Abstract:
We report a reanalysis of data on the measured decay rate ratio 22Na/44Ti which were originally published by Norman et al., and interpreted as supporting the conventional hypothesis that nuclear decay rates are constant and not affected by outside influences. We find upon a more detailed analysis of both the amplitude and the phase of the Norman data that they actually favor the presence of an annual variation in 22Na/44Ti, albeit weakly. Moreover, this conclusion holds for a broad range of parameters describing the amplitude and phase of an annual sinusoidal variation in these data. The results from this and related analyses underscore the growing importance of phase considerations in understanding the possible influence of the Sun on nuclear decays. Our conclusions with respect to the phase of the Norman data are consistent with independent analyses of solar neutrino data obtained at Super-Kamiokande-I and the Sudbury Neutrino Observatory (SNO).read more
Citations
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On decay constants and orbital distance to the Sun—part III: beta plus and electron capture decay
Stefaan Pommé,H. Stroh,J. Paepen,R. Van Ammel,M. Marouli,Timotheos Altzitzoglou,Mikael Hult,Karsten Kossert,Ole Nähle,H. Schrader,Frédéric Juget,Claude Bailat,Youcef Nedjadi,François Bochud,T. Buchillier,C Michotte,S Courte,M.W. van Rooy,M.J. van Staden,J. Lubbe,B.R.S. Simpson,Aldo Fazio,P. De Felice,T. W. Jackson,W.M. van Wyngaardt,M. I. Reinhard,J. Golya,S. Bourke,T. Roy,Raphael Galea,John Keightley,K.M. Ferreira,Sean Collins,A. Ceccatelli,L. Verheyen,M. Bruggeman,Branko Vodenik,Matjaž Korun,V. Chisté,M.-N. Amiot +39 more
TL;DR: The hypothesis that seasonal changes in proximity to the Sun cause variation of decay constants at permille level has been tested for radionuclides disintegrating through electron capture and beta plus decay as mentioned in this paper.
Journal ArticleDOI
Concerning the time dependence of the decay rate of 137Cs.
TL;DR: It is found that the PTB measurements of the decay rate of (137)Cs show no evidence of an annual oscillation, in agreement with the recent report by Bellotti et al., and is consistent with the finding that different nuclides have different sensitivities to whatever external influences are responsible for the observed periodic variations.
Journal ArticleDOI
Analysis of beta-decay data acquired at the Physikalisch-Technische Bundesanstalt: evidence of a solar influence
TL;DR: In this paper, an analysis of radon beta-decay data acquired at the Geological Survey of Israel (GSI) Laboratory for the same time interval yields strong confirmation of this oscillation.
Journal ArticleDOI
Evidence for correlations between fluctuations in 54Mn decay rates and solar storms
T. Mohsinally,S. Fancher,M. Czerny,Ephraim Fischbach,J. T. Gruenwald,J. M. Heim,Jere H. Jenkins,J. M. Nistor,D. O’Keefe,D. O’Keefe +9 more
TL;DR: In this article, a series of signal-detection algorithms determine regions of statistically significant fluctuations in decay behavior from the expected exponential form, and 239 decay flags identified during this interval were compared to daily distributions of multiple solar indices, generated by noaa, which are associated with heightened solar activity.
Journal ArticleDOI
Comparative Analyses of Brookhaven National Laboratory Nuclear Decay Measurements and Super-Kamiokande Solar Neutrino Measurements: Neutrinos and Neutrino-Induced Beta-Decays as Probes of the Deep Solar Interior
TL;DR: In this paper, power spectrum and spectrogram analyses of these datasets show evidence not only of the annual oscillations, but also of transient oscillations with frequencies near 11 and 12.5 year−1.
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