On decay constants and orbital distance to the Sun—part III: beta plus and electron capture decay

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dc.contributor.authorPommé, Sen_AU
dc.contributor.authorStroh, Hen_AU
dc.contributor.authorPaepen, Jen_AU
dc.contributor.authorVan Ammel, Ren_AU
dc.contributor.authorMarouli, Men_AU
dc.contributor.authorAltzitzoglou, Ten_AU
dc.contributor.authorHult, Men_AU
dc.contributor.authorKossert, Ken_AU
dc.contributor.authorNähle, Oen_AU
dc.contributor.authorSchrader, Hen_AU
dc.contributor.authorJuget, Fen_AU
dc.contributor.authorBailat, Cen_AU
dc.contributor.authorNedjadi, Yen_AU
dc.contributor.authorBochud, Fen_AU
dc.contributor.authorBuchillier, Ten_AU
dc.contributor.authorMichotte, Cen_AU
dc.contributor.authorCourte, Sen_AU
dc.contributor.authorvan Rooy, MWen_AU
dc.contributor.authorvan Staden, MJen_AU
dc.contributor.authorLubbe, Jen_AU
dc.contributor.authorSimpson, BRSen_AU
dc.contributor.authorFazio, Aen_AU
dc.contributor.authorDe Felice, Pen_AU
dc.contributor.authorJackson, TWen_AU
dc.contributor.authorvan Wyngaardt, WMen_AU
dc.contributor.authorReinhard, MIen_AU
dc.contributor.authorGolya, Jen_AU
dc.contributor.authorBourke, Sen_AU
dc.contributor.authorRoy, Ten_AU
dc.contributor.authorGalea, Ren_AU
dc.contributor.authorKeightley, JDen_AU
dc.contributor.authorFerreira, KMen_AU
dc.contributor.authorCollins, SMen_AU
dc.contributor.authorCeccatelli, Aen_AU
dc.contributor.authorVerheyen, Len_AU
dc.contributor.authorBruggeman, Men_AU
dc.contributor.authorVodenik, Ben_AU
dc.contributor.authorKorun, Men_AU
dc.contributor.authorChisté, Ven_AU
dc.contributor.authorAmiot, MNen_AU
dc.date.accessioned2021-11-16T01:14:46Zen_AU
dc.date.available2021-11-16T01:14:46Zen_AU
dc.date.issued2016-11-28en_AU
dc.date.statistics2021-11-12en_AU
dc.description.abstractThe hypothesis that seasonal changes in proximity to the Sun cause variation of decay constants at permille level has been tested for radionuclides disintegrating through electron capture and beta plus decay. Activity measurements of 22Na, 54Mn, 55Fe, 57Co, 65Zn, 82+85Sr, 90Sr, 109Cd, 124Sb, 133Ba, 152Eu, and 207Bi sources were repeated over periods from 200 d up to more than four decades at 14 laboratories across the globe. Residuals from the exponential nuclear decay curves were inspected for annual oscillations. Systematic deviations from a purely exponential decay curve differ 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 β+ and EC decaying sources set an upper limit of 0.006% or less 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. © The Authors CC BY 3.0 licenceen_AU
dc.identifier.citationPommé, S., Stroh, H., Paepen, J., Van Ammel, R., Marouli, M., Altzitzoglou, T., Hult, M., Kossert, K., Nähle, O., Schrader, H., Juget, F., Bailat, C., Nedjadi, Y., Bochud, F., Buchillier, T., Michotte, C., Courte, S., van Rooy, M. W., van Staden, M. J., Lubbe, J., Simpson, B. R. S., Fazio, A., De Felice, P., Jackson, T. W., Van Wyngaardt, W. M., Reinhard, M. I., Golya, J., Bourke, S., Roy, T., Galea, R., Keightley, J. D., Ferreira, K. M., Collins, S. M., Ceccatelli, A., Verheyen, L., Bruggeman, M., Vodenik, B., Korun, M., Chisté, V., & Amiot, M.-N. (2016). On decay constants and orbital distance to the Sun—part III: beta plus and electron capture decay. Metrologia, 54(1), 36-50. doi:10.1088/1681-7575/54/1/36en_AU
dc.identifier.issn1681-7575en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleMetrologiaen_AU
dc.identifier.pagination36-50en_AU
dc.identifier.urihttps://iopscience.iop.org/article/10.1088/1681-7575/54/1/36/metaen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12257en_AU
dc.identifier.volume54en_AU
dc.language.isoenen_AU
dc.publisherIOP Publishingen_AU
dc.subjectDecayen_AU
dc.subjectSunen_AU
dc.subjectBeta decayen_AU
dc.subjectIsotopesen_AU
dc.subjectRadionuclide metrologyen_AU
dc.subjectMetrologyen_AU
dc.subjectOscillationsen_AU
dc.subjectEarth planeten_AU
dc.subjectDistanceen_AU
dc.titleOn decay constants and orbital distance to the Sun—part III: beta plus and electron capture decayen_AU
dc.typeJournal Articleen_AU
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