1. [1] F. Arbes, O. Becker, H. Knab, K.H. Knöll, and G. Werth, “On the pssible determination of hyperfine anomalies by trapped ion spectroscopy,” Nucl. Instr. Meth. Phys. Res., vol.B70, pp.494-499, 1992.
2. [2] R.B. Warrington, P.T.H. Fisk, M.J. Wouters, M.A. Lawn, J.J. Longdell, and S.J. Park, “Development of a 171Yb+ microwave frequency standard at the national measurement institute Australia,” IEEE Proc. Int. Frequency Control Symp., pp.611-615, Vancouver, Canada, 2005.
3. Laser-Cooled Mercury Ion Frequency Standard
4. [4] J.D. Prestage, S. Chung, T. Le, L. Lim, and L. Maleki, “Liter sized ion clock with 10-15 stability,” IEEE Proc. Int. Frequency Control Symp., pp.472-476, Vancouver, Canada, 2005.
5. [5] G.P. Barwood, C.S. Edwards, P. Gill, H.A. Klein, and W.R.C. Rowley, “Observation of the 5s2S1/2-4d2D5/2 transition in a single laser cooled trapped Sr+ ion by using all-solid-state system lasers,” Opt. Lett., vol.18, pp.732-734, 1993.