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Comparison of the alpha-decay half-life of 210Po implanted in a copper matrix at 4.2 and 293 K

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Repnow,  Roland
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Pöml, P., Belloni, F., D’Agata, E., Colineau, E., Morgenstern, A., Griveau, J.-C., et al. (2014). Comparison of the alpha-decay half-life of 210Po implanted in a copper matrix at 4.2 and 293 K. Physical Review C, 89(2): 024320. doi:10.1103/PhysRevC.89.024320.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-BC3D-7
Abstract
In light of recent speculations on a potentially increased speed of the radioactive decay of α-emitters embedded in a metallic matrix at very low temperature, four high-purity Cu disks deep-implanted with Bi209 were prepared. The disks were irradiated in a high-flux reactor to transmute the Bi209 into Po210. After the irradiation, the Po210 activity was measured for all four disks. While two of the disks were stored at room temperature, the other two disks were stored in a sealed container submerged in liquid helium (T=4.2 K) for approximately 200 days. After the storage time the Po210-activity measurements were repeated and the Po210 half-life was 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 α emitters embedded in a metallic matrix at very low temperature.