Alpha-decay half-life of 221Fr in different environments |
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| Authors: | H. B. Jeppesen J. Byskov-Nielsen P. Wright J. G. Correia L. M. Fraile H. O. U. Fynbo K. Johnston K. Riisager |
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| Affiliation: | 1.PH Department, CERN,ISOLDE,Genéve 23,Switzerland;2.Institut for Fysik og Astronomi,Aarhus Universitet,Aarhus C,Denmark;3.Chalmers Tekniska H?gskola,Fundamental Fysik,G?teborg,Sweden |
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| Abstract: | A possible dependence of the alpha decay process on the solid-state environment of the decaying nucleus has been investigated by measuring the alpha-decay half-life of 221Fr at room temperature in different materials ( Au, W, Si and polyethylene). The change in half-life between the insulator Si and the metals Au/ W is found to be 0.30(17)% / 0.42(21)%, respectivly. Furthermore an improved value of 4.79(2)min was found for the absolute half-life of 221Fr. |
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| Keywords: | 23.60.+e Alpha decay 21.10.Tg Lifetimes 27.90.+b 220≤ A |
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