Skip to Main content Skip to Navigation
Journal articles

On decay constants and orbital distance to the Sun—part II: beta minus decay

Abstract : 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.
Complete list of metadatas

Cited literature [47 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01881367
Contributor : Marie-France Robbe <>
Submitted on : Friday, March 27, 2020 - 11:52:40 PM
Last modification on : Monday, March 30, 2020 - 4:04:04 PM

File

article_SPommé_Metrologia_par...
Publication funded by an institution

Identifiers

Collections

Citation

S. Pomme, S Stroh, J. Paepen, V van Ammel, M. Marouli, et al.. On decay constants and orbital distance to the Sun—part II: beta minus decay. Metrologia, IOP Publishing, 2017, 54 (1), pp.19 - 35. ⟨10.1088/1681-7575/54/1/19⟩. ⟨hal-01881367⟩

Share

Metrics

Record views

217

Files downloads

123