The half-life of $^{221}$Fr in Si and Au at 4K and at mK temperatures

Details The half-life of $^{221}$Fr in Si and Au at 4K and at mK temperatures The half-life of $^{221}$Fr in Si and Au at 4K and at mK temperatures

2010-10-29

arxiv.org/abs/1010.6250v1

Phys.Rev.C82:064317,2010

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1103/PhysRevC.82.064317

The half-life of the $\alpha$ decaying nucleus $^{221}$Fr was determined in different environments, i.e. embedded in Si at 4 K, and embedded in Au at 4 K and about 20 mK. No differences in half-life for these different conditions were observed within 0.1%. Furthermore, we quote a new value for the absolute half-life of $^{221}$Fr of t$_{1/2}$ = 286.1(10) s, which is of comparable precision to the most precise value available in literature.

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