First high-resolution spectroscopy of 201Hg+ hyperfine structure: a sensitive probe of nuclear structure and the hyperfine anomaly

Details First high-resolution spectroscopy of 201Hg+ hyperfine structure: a sensitive probe of nuclear structure and the hyperfine anomaly First high-resolution spectroscopy of 201Hg+ hyperfine structure: a sensitive probe of nuclear structure and the hyperfine anomaly

2009-04-15

arxiv.org/abs/0904.2224v1

Physics

Atomic Physics

20 pages, 6 figures, submitted to Physical Review A

Scientific paper

Using 201Hg+ contained within a linear quadrupole rf ion trap that is part of an atomic clock, we report the first high-resolution spectroscopy on the hyperfine structure of 201Hg+. We measure the absolute ground state hyperfine interval to be 29.954365821130(171)(62)(10) GHz, more than 8 orders of magnitude improvement over the previous measurement. The first error estimate in parentheses is the statistical error in the shifted line center measurement, the second is systematic uncertainty, and the third is calibration uncertainty in the hydrogen maser reference standard. By comparison to the already accurately known ground state hyperfine interval for 199Hg+, we are able to derive a new value for the hyperfine anomaly in singly ionized mercury, Delta(S1/2, 199Hg+, 201Hg+) = -0.0016257(5), now limited by knowledge of the nuclear magnetic moment ratio.

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