Enhanced effect of temporal variation of the fine structure constant and strong interaction in 229Th
V. V. Flambaum
Abstract
The relative effects of variation of the fine structure constant alpha=e2/hc and dimensionless strong interaction parameter mq/LambdaQCD are enhanced 5-6 orders of magnitude in very narrow ultraviolet transition between the ground and first excited state in 229Th nucleus (energy (3.5 +/- 1) eV). Corresponding experiment has potential of improving sensitivity to the variation of the fundamental constants by 7-10 orders of magnitude (up to 10-23 per year).
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