2.7 years of beta-decay-rate ratio measurements in a controlled environment.

Autor: McKnight E; Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602, United States., Bergeson SD; Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602, United States. Electronic address: scott.bergeson@byu.edu., Peatross J; Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602, United States., Ware MJ; Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602, United States.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2018 Dec; Vol. 142, pp. 113-119. Date of Electronic Publication: 2018 Sep 20.
DOI: 10.1016/j.apradiso.2018.09.021
Abstrakt: We report nearly continuous beta-decay-rate measurements of Na-22, Cl-36, Co-60, Sr-90, and Cs-137 over a period of 2.7 years using four Geiger-Müller tubes. We carefully control the ambient pressure and temperature for the detectors, sources, and electronics in order to minimize environmentally-dependent systematic drifts in the measurement chains. We show that the amplitudes of an annual oscillation in the decay rates are consistent with zero to within 0.004%.
(Copyright © 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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