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On decay constants and orbital distance to the Sun—part II: beta minus decay
- Source :
- Metrologia, vol. 54, no. 1, pp. 19-35, Metrologia, Metrologia, IOP Publishing, 2017, 54 (1), pp.19-35. ⟨10.1088/1681-7575/54/1/19⟩, Metrologia, 2017, 54 (1), pp.19-35. ⟨10.1088/1681-7575/54/1/19⟩
- Publication Year :
- 2017
-
Abstract
- International audience; Claims that proximity to the Sun causes variations of decay constants at the permille level have been investigated for beta-minus decaying nuclides. Repeated activity measurements of H-3, C-14, Co-60, Kr-85, Sr-90, Sb-124, Cs-134, Cs-137, and Eu-154 sources were performed over periods of 259 d up to 5 decades at various nuclear metrology institutes. Residuals from the exponential decay curves were inspected for annual oscillations. Systematic deviations from a purely exponential decay curve differ in amplitude and phase from one data set to another and appear attributable to instabilities in the instrumentation and measurement conditions. Oscillations in phase with Earth's orbital distance to the Sun could not be observed within 10(-4)-10(-5) range precision. The most stable activity measurements of beta-decaying sources set an upper limit of 0.003%-0.007% to the amplitude of annual oscillations in the decay rate. There are no apparent indications for systematic oscillations at a level of weeks or months.
- Subjects :
- half-life
non-exponential decay
Instrumentation
Phase (waves)
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
01 natural sciences
UNCERTAINTIES
Nuclear physics
Theoretical physics
neutrino
CS-137
decay constant
Sun
radioactivity
0103 physical sciences
Nuclide
RATES
Exponential decay
010303 astronomy & astrophysics
Engineering(all)
Physics
010308 nuclear & particles physics
IONIZATION-CHAMBER
General Engineering
Half-life
SOLAR INFLUENCE
Beta decay
Amplitude
High Energy Physics::Experiment
Neutrino
Subjects
Details
- Language :
- English
- ISSN :
- 00261394 and 16817575
- Database :
- OpenAIRE
- Journal :
- Metrologia, vol. 54, no. 1, pp. 19-35, Metrologia, Metrologia, IOP Publishing, 2017, 54 (1), pp.19-35. ⟨10.1088/1681-7575/54/1/19⟩, Metrologia, 2017, 54 (1), pp.19-35. ⟨10.1088/1681-7575/54/1/19⟩
- Accession number :
- edsair.doi.dedup.....94503d2796509c8b8f28f233787dbdbf