Title: Comparison of the alpha-decay half-life of 210Po implanted in a copper matrix at 4.2 and 293 K
Authors: POEML PHILIPPBELLONI F.D'AGATA ElioCOLINEAU EricMORGENSTERN AlfredGRIVEAU Jean-ChristopheRONDINELLA VincenzoREPNOW RNASSISI V.BENNEKER PLAPETITE Jean-MarcHIMBERT Jerome
Citation: PHYSICAL REVIEW C vol. 89 no. 2 p. 024320
Publisher: AMER PHYSICAL SOC
Publication Year: 2014
JRC N°: JRC86070
ISSN: 0556-2813
URI: http://journals.aps.org/prc/abstract/10.1103/PhysRevC.89.024320
http://publications.jrc.ec.europa.eu/repository/handle/JRC86070
DOI: 10.1103/PhysRevC.89.024320
Type: Articles in periodicals and books
Abstract: In light of recent speculations on a potentially increased speed of the radioactive decay of alpha-emitters embedded in a metallic matrix at very low temperature, four high-purity Cu discs deep- implanted with 209Bi were prepared. The discs were irradiated in a high-flux reactor and the 209Bi transmuted into 210Po. After the irradiation the 210Po-activity was measured for all four discs. While two of the discs were stored at room temperature, the two other discs were stored in a sealed container submerged in liquid helium (T = 4.2 K) for approximately 200 days. After the storage time the 210Po-activity measurements were repeated and the 210Po-half-life calculated for each sample. No difference between the half-lives for the four samples could be detected within the uncertainties of the measurements. In other words, the results of this study show no evidence for an increase of activity for a-emitters embedded in a metallic matrix at very low temperature.
JRC Directorate:Nuclear Safety and Security

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