Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+

Details Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+ Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+

2006-11-14

arxiv.org/abs/physics/0611134v3

Phys. Rev. A 75, 032506 (2007)

Physics

Atomic Physics

corrected for sign errors in the hyperfine constants. No corrections to were made to the data analysis

Scientific paper

The hyperfine structure of the S1/2-D5/2 quadrupole transition at 729 nm in 43Ca+ has been investigated by laser spectroscopy using a single trapped 43Ca+ ion. We determine the hyperfine structure constants of the metastable level as A=-3.8931(2) MHz and B=-4.241(4) MHz. The isotope shift of the transition with respect to 40Ca+ was measured to be 4134.713(5) MHz. We demonstrate the existence of transitions that become independent of the first-order Zeeman shift at non-zero low magnetic fields. These transitions might be better suited for building a frequency standard than the well-known 'clock transitions' between m=0 levels at zero magnetic field.

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