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Is decay constant?

S Pommé1, H Stroh1, T Altzitzoglou1

  • 1European Commission, Joint Research Centre (JRC), Directorate for Nuclear Safety and Security, Retieseweg 111, B-2440 Geel, Belgium.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
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PubMed
Summary
This summary is machine-generated.

This study investigated claims that neutrinos affect radioactive decay rates. Analysis of 12 datasets found no evidence supporting these claims, refuting the idea of a fifth force influencing nuclear decay.

Keywords:
Cognitive biasDecay constantHalf-lifeNeutrinoRadioactivitySolar cycle

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Area of Science:

  • Nuclear Physics
  • Astroparticle Physics
  • Radioactivity Research

Background:

  • Doubts have been raised regarding the constancy of decay constants, challenging the exponential decay law.
  • Claims suggest a 'fifth force' interaction involving neutrinos could alter decay rates, correlating with solar neutrino flux variations.

Purpose of the Study:

  • To investigate claims of neutrino-induced modulations in radioactive decay rates.
  • To test the hypothesis that solar neutrino flux variations affect nuclear decay constants.

Main Methods:

  • Analyzed 12 high-precision, long-term decay rate datasets.
  • Searched for systematic modulations in decay rates across various frequencies (0.08 to 20 year⁻¹).
  • Examined alpha, beta-minus, beta-plus, and electron capture decay types.

Main Results:

  • No common oscillations were observed across different decay types, beyond minor annual effects.
  • Fitted oscillation amplitudes in decay rate residuals did not exceed 3 times their standard uncertainty.
  • Observed uncertainties ranged from 0.00023% to 0.023%.

Conclusions:

  • The study contradicts assertions that neutrino-induced beta decay offers insights into the solar interior.
  • The invariability of decay constants, fundamental to radioactivity measurement, remains supported by this analysis.