Solar Physics

, Volume 267, Issue 2, pp 251–265 | Cite as

Power Spectrum Analysis of Physikalisch-Technische Bundesanstalt Decay-Rate Data: Evidence for Solar Rotational Modulation

  • P. A. Sturrock
  • J. B. Buncher
  • E. Fischbach
  • J. T. Gruenwald
  • D. JavorsekII
  • J. H. Jenkins
  • R. H. Lee
  • J. J. Mattes
  • J. R. Newport
Article

Abstract

Evidence for an anomalous annual periodicity in certain nuclear-decay data has led to speculation on a possible solar influence on nuclear processes. We have recently analyzed data concerning the decay rates of 36Cl and 32Si, 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 year−1, which is lower than the equatorial synodic rotation rates of the convection and radiative zones. This article concerns measurements of the decay rates of 226Ra 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 year−1, and a peak in the BNL dataset at 11.25 year−1. The change in the BNL result is not significant, since the uncertainties in the BNL and PTB analyses are estimated to be 0.13 year−1 and 0.07 year−1, respectively. Combining the two running means by forming the joint power statistic leads to a highly significant peak at frequency 11.23 year−1. We will briefly comment on the possible implications of these results for solar physics and for particle physics.

Keywords

Nuclear physics Solar structure Solar neutrinos 

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References

  1. Alburger, D.E., Harbottle, G., Norton, E.F.: 1986, Earth Planet Sci. Lett. 78, 168. CrossRefADSGoogle Scholar
  2. Anselmann, P., Hampel, W., Heusser, G., Kiko, J., Kirsten, T., Laubenstein, M., et al.: 1993, Phys. Lett. B 314, 445. CrossRefADSGoogle Scholar
  3. Anselmann, P., Hampel, W., Heusser, G., Kiko, J., Kirsten, T., Laubenstein, M., et al.: 1995, Phys. Lett. B 357, 237. CrossRefADSGoogle Scholar
  4. Bahcall, J.N., Press, W.H.: 1991, Astrophys. J. 370, 730. CrossRefADSGoogle Scholar
  5. Cleveland, B.T., Daily, T., Davis, R. Jr., Distel, J.R., Lande, K., Lee, C.K., et al.: 1968, Astrophys. J. 496, 505. CrossRefADSGoogle Scholar
  6. Cooper, P.S.: 2009, Astropart. Phys. 31, 267. CrossRefADSGoogle Scholar
  7. Davis, R. Jr., Harmer, D.S., Hoffman, K.C.: 1968, Phys. Rev. Lett. 20, 1205. CrossRefADSGoogle Scholar
  8. Dostal, K.P., Nagel, M., Pabst, D.: 1977, Z. Naturforsch. A 32, 345. ADSGoogle Scholar
  9. Emery, G.T.: 1972, Annu. Rev. Nucl. Sci. 22, 165. CrossRefADSGoogle Scholar
  10. Fischbach, E., Buncher, J.B., Gruenwald, J.T., Jenkins, J.H., Krause, D.E., Mattes, J.J., et al.: 2009, Space Sci. Rev. 145, 285. CrossRefADSGoogle Scholar
  11. Garcia, R.A., Turck-Chiese, S., Jimenez-Reyes, S.J., Ballot, J., Palle, P.L., Eff-Darwich, A., et al.: 2007, Science 316, 1573. CrossRefGoogle Scholar
  12. Hahn, H.P., Born, H.J., Kim, J.: 1976, Radiochim. Acta 23, 23. Google Scholar
  13. Hampel, W., Heusser, G., Kiko, J., Kirsten, T., Laubenstein, M., Pernicka, E., et al.: 1996, Phys. Lett. B 388, 384. CrossRefADSGoogle Scholar
  14. Hampel, W., Handt, J., Heusser, G., Kiko, J., Kirsten, T., Laubenstein, M., et al.: 1999, Phys. Lett. B 447, 127. CrossRefADSGoogle Scholar
  15. Javorsek, D. II, Sturrock, P.A., Lasenby, R.N., Lasenby, A.N., Buncher, J.B., Fischbach, E., et al.: 2010, Astropart. Phys. 34, 173. CrossRefADSGoogle Scholar
  16. Jenkins, J.H., Fischbach, E.: 2009, Astropart. Phys. 31, 407. CrossRefADSGoogle Scholar
  17. Jenkins, J.H., Mundy, D.W., Fischbach, E.: 2010, Nucl. Instrum. Methods Phys. Res. A 620, 332. CrossRefADSGoogle Scholar
  18. Jenkins, J.H., Fischbach, E., Buncher, J.B., Gruenwald, J.T., Krause, D.E., Mattes, J.J.: 2009, Astropart. Phys. 32, 42. CrossRefADSGoogle Scholar
  19. Krause, F., Radler, K.H., Rudiger, G. (eds.): 1993, The Cosmic Dynamo. Proc. 157th IAU Symp., Potsdam, 7 – 11 September 1992, Kluwer Academic, Dordrecht. Google Scholar
  20. Lomb, N.: 1976, Astrophys. Space Sci. 39, 447. CrossRefADSGoogle Scholar
  21. Norman, E.B., Browne, E., Shugart, H.A., Joshi, T.H., Firestone, R.B.: 2009, Astropart. Phys. 31, 135. CrossRefADSGoogle Scholar
  22. Rutherford, E., Chadwick, J., Ellis, C.: 1930, Radioactive Substances and Their Radiations, Cambridge University Press, New York, 161. Google Scholar
  23. Scargle, J.D.: 1982, Astrophys. J. 263, 835. CrossRefADSGoogle Scholar
  24. Schou, J., Antia, H.M., Basu, S., Bogart, R.S., Bush, R.I., Chitre, S.M., et al.: 1998, Astrophys. J. 505, 390. CrossRefADSGoogle Scholar
  25. Schrader, H.: 1992, Nucl. Inst. Phys. Res. A 312, 34. CrossRefADSGoogle Scholar
  26. Schrader, H.: 2010, Appl. Radiat. Isot. 68, 1583. CrossRefGoogle Scholar
  27. Semkow, T.M., Haines, D.K., Beach, S.E., Kilpatrick, B.J., Khan, A.J., O’Brien, K.: 2009, Phys. Lett. B 675, 415. CrossRefADSGoogle Scholar
  28. Siegert, H., Schrader, H., Schotzig, U.: 1998, Appl. Radiat. Isot. 79, 1397. CrossRefGoogle Scholar
  29. Sturrock, P.A.: 2008, Astrophys. J. 706, L53. CrossRefADSGoogle Scholar
  30. Sturrock, P.A.: 2009, Solar Phys. 254, 227. CrossRefADSGoogle Scholar
  31. Sturrock, P.A., Scargle, J.D.: 2010, Astrophys. J. 718, 527. CrossRefADSGoogle Scholar
  32. Sturrock, P.A., Caldwell, D.O., Scargle, J.D., Wheatland, M.S.: 2005a, Phys. Rev. D 72, 113004. CrossRefADSGoogle Scholar
  33. Sturrock, P.A., Scargle, J.D., Walther, G., Wheatland, M.S.: 2005b, Solar Phys. 227, 137. CrossRefADSGoogle Scholar
  34. Sturrock, P.A., Buncher, J.B., Fischbach, E., Gruenwald, J.T., Javorsek, D. II, Jenkins, J.H., et al.: 2010, Astropart. Phys. 34, 121. CrossRefADSGoogle Scholar
  35. Willson, R.C.: 1979, J. Appl. Opt. 18, 179. CrossRefADSGoogle Scholar
  36. Willson, R.C.: 2001, Earth Obs. 13(3), 14. Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • P. A. Sturrock
    • 1
  • J. B. Buncher
    • 2
  • E. Fischbach
    • 2
  • J. T. Gruenwald
    • 2
  • D. JavorsekII
    • 3
  • J. H. Jenkins
    • 2
    • 4
  • R. H. Lee
    • 5
  • J. J. Mattes
    • 2
  • J. R. Newport
    • 2
  1. 1.Center for Space Science and AstrophysicsStanford UniversityStanfordUSA
  2. 2.Department of PhysicsPurdue UniversityWest LafayetteUSA
  3. 3.416th Flight Test Squadron412th Test WingEdwards AFBUSA
  4. 4.Purdue University Nuclear EngineeringWest LafayetteUSA
  5. 5.Department of PhysicsUnited States Air Force AcademyColorado SpringsUSA

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