Experimental test of the time stability of the half-life of alpha-decay 214Po nuclei

• Published in: Astroparticle physics Vol. 46; pp. 23 - 28
• Main Authors: Alexeyev, E.N., Alekseenko, V.V., Gavriljuk, Ju.M., Gangapshev, A.M., Gezhaev, A.M., Kazalov, V.V., Kuzminov, V.V., Panasenko, S.I., Ratkevich, S.S., Yakimenko, S.P.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2013
• Subjects: Alpha decays; Beta decays; Nuclear Decay Fluctuations; Nuclear Decay Lifetimes; Nuclear Decay Lifetimes; Alpha decays; Beta decays; Nuclear Decay Fluctuations
• ISSN: 0927-6505; 1873-2852
• DOI: 10.1016/j.astropartphys.2013.04.005

•A method and results of an experimental test of the time stability of the half-life of alpha-decay Po-214 nuclei are presented.•Two underground installations aimed at monitoring of the time stability were constructed.•Time of the measurement exceeds 1038days for one set up and 562days for the other.•We found that the amplitude of an annual variation of Po-214 half-life does not exceed 0.33% (90% C.L.) of the mean value.•The limit of the decay curve deviation from exponent at 0.034×T1/2<t<0.1×T1/2 range was found. A method and results of an experimental test of the time stability of the half-life of alpha-decay 214Po nuclei are presented. Two underground installations aimed at monitoring the time stability have been constructed. Time of measurement exceeds 1038days for one set up and 562days for the other. It was found that the amplitude of a possible annual variation of 214Po half-life does not exceed 0.33% (90% C.L.) of the mean value. The limit on the deviation of the decay curve from exponent at 0.034×T1/2<t<0.1×T1/2 range has been found.