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Jenkins JH, Fischbach E, Javorsek D, et al. Concerning the time dependence of the decay rate of 137Cs. Appl Radiat Isot. 2012;74:50-5doi: 10.1016/j.apradiso.2012.12.010.
Jenkins, J. H., Fischbach, E., Javorsek, D., Lee, R. H., & Sturrock, P. A. (2013). Concerning the time dependence of the decay rate of 137Cs. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 7450-5. https://doi.org/10.1016/j.apradiso.2012.12.010
Jenkins, J H, et al. "Concerning the time dependence of the decay rate of 137Cs." Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine vol. 74 (2013): 50-5. doi: https://doi.org/10.1016/j.apradiso.2012.12.010
Jenkins JH, Fischbach E, Javorsek D, Lee RH, Sturrock PA. Concerning the time dependence of the decay rate of 137Cs. Appl Radiat Isot. 2013 Apr;74:50-5. doi: 10.1016/j.apradiso.2012.12.010. Epub 2012 Dec 31. PMID: 23353092.
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Appl Radiat Isot. 2013 Apr;74:50-5. doi: 10.1016/j.apradiso.2012.12.010. Epub 2012 Dec 31.

Concerning the time dependence of the decay rate of 137Cs.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

J H Jenkins, E Fischbach, D Javorsek, R H Lee, P A Sturrock

Affiliations

  1. School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907, USA. [email protected]

PMID: 23353092 DOI: 10.1016/j.apradiso.2012.12.010

Abstract

The decay rates of eight nuclides ((85)Kr, (90)Sr, (108)Ag, (133)Ba, (137)Cs, (152)Eu, (154)Eu, and (226)Ra) were monitored by the standards group at the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany, over the time frame June 1999 to November 2008. We find 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. However, power spectrum analysis of PTB measurements of a (133)Ba standard, measured in the same detector system, does show such evidence. This result is consistent with our finding that different nuclides have different sensitivities to whatever external influences are responsible for the observed periodic variations.

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