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Evidence of Correlations Between Nuclear Decay Rates and Solar Activity

Evidence of Correlations Between Nuclear Decay Rates and Solar Activity. Jere Jenkins Ephraim Fischbach John Buncher Tom Gruenwald Dennis Krause Josh Mattes John Newport. References.

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Evidence of Correlations Between Nuclear Decay Rates and Solar Activity

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  1. Evidence of Correlations Between Nuclear Decay Rates and Solar Activity Jere Jenkins Ephraim Fischbach John Buncher Tom Gruenwald Dennis Krause Josh Mattes John Newport

  2. References • Perturbation of Nuclear Decay Rates During the Solar Flare of 13 December 2006 (Jere H. Jenkins, Ephraim Fischbach) http://arxiv.org/abs/0808.3986 • Evidence for Correlations Between Nuclear Decay Rates and Earth-Sun Distance (Jere H. Jenkins, Ephraim Fischbach, John B. Buncher, John T. Gruenwald, Dennis E. Krause, Joshua J. Mattes ) http://arxiv.org/abs/0808.3283

  3. Outline • Brief history of radioactivity • Brookhaven National Laboratory 32Si data (Alburger, Harbottle, and Norton) • PTB 226Ra data (Siegert, Schrader, and Schötzig) • BNL/PTB correlations • 2006 December solar flare data • Discrepancies in half-life measurements • Possible mechanisms • Spacecraft and other tests

  4. From: Radioactive Substances and Their Radiations, by Rutherford,

  5. 116mIn T1/2=54.2 min

  6. A New Test of Randomness

  7. Pearson Correlation Coefficient r=0.52, N=239, Prob=4.17x10-18 Data from: Alburger, et al., Earth and Planet. Sci. Lett., 78, (1986) 168-176

  8. Pearson Correlation Coefficient r=0.66, N=233, Prob=1.0x10-31 Data from: Alburger, et al., Earth and Planet. Sci. Lett., 78, (1986) 168-176

  9. Pearson Correlation Coefficient r=0.62, N=1974, Prob=5.13x10-210 Data from Siegert, et al., Appl. Radiat. Isot. 49, 1397 (1998) Fig. 1

  10. Pearson Correlation Coefficient r=0.65, N=1968, Prob=3.12x10-246 Data from Siegert, et al., Appl. Radiat. Isot. 49, 1397 (1998) Fig. 1

  11. Pearson Correlation Coefficient r=0.66, N=39, Prob=5.8x10-6

  12. Pearson Correlation Coefficient r=0.87, N=35, Prob=3.78x10-12

  13. Pearson Correlation Coefficient r=0.89, N=33, Prob=1.85x10-12

  14. Motivation for Purdue Experiments • Correlation between BNL and PTB data • Correlation of these data with 1/R2 Earth-Sun distance

  15. Sunspot 930 Source of Dec 06 Flares

  16. (7.51±1.07) x 105 Events missing

  17. Data from Yoo, et al., Phys Rev D 68, 092002 (2003)

  18. H. Schrader, Appl. Rad. & Iso., 60 (2004) 317-323

  19. T1/2=313.5d T1/2=1953d

  20. Possible Mechanisms • Spatial Variation of the Fine Structure Constant α

  21. Spatial Variation of the Fine Structure Constant  For alpha decay (e.g., 226Ra  222Rn + 4He) From our 226Ra data, This may be incompatible with existing WEP and 5th force constraints. References: D. J. Shaw, gr-qc/0702090; J.D. Barrow and D. J. Shaw, arXiv:0806:4317; J.-P. Uzan, Rev. Mod. Phys. 75, 403 (2003)

  22. Possible Mechanisms • Spatial variation of the fine structure constant α • Spin-dependent long range force coupling to neutrinos

  23. Spin-dependent long range force coupling to neutrinos Δ

  24. Variation in Solar Neutrino Flux For -decay, where  is extremely sensitive to small shifts in E0 Assume E0  E0+, where  arises from solar neutrinos, then Next, assume where For an unpolarized sample,

  25. Variation in Solar Neutrino Flux (cont’d) Compare this to the change induced by This may be compatible with current limits on neutrino magnetic dipole moments.

  26. 32Si Launch 8/3/2007 226Ra Arrival 5/25/2008 Chen, Okutsu, and Longuski

  27. Chen, Okutsu, and Longuski

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