Enhanced orbital electron-capture nuclear decay rate in compact medium

Details Enhanced orbital electron-capture nuclear decay rate in compact medium Enhanced orbital electron-capture nuclear decay rate in compact medium

2009-04-02

arxiv.org/abs/0904.0326v1

Physics

Nuclear Physics

Nuclear Experiment

30 pages, 3 Figures, 2 Tables

Scientific paper

The eigenstate energies of an atom increase under spatial confinement and this effect should also increase the electron density of the orbital electrons at the nucleus thus increasing the decay rate of an electron-capturing radioactive nucleus. We have observed that the orbital electron capture rates of 109In and 110Sn increased by (1.00+-0.17)% and (0.48+-0.25)% respectively when implanted in the small Au lattice versus large Pb lattice. These results have been understood because of the higher compression experienced by the large radioactive atoms due to the spatial confinement in the smaller Au lattice.

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