Pth. Fisk et al., LASER COOLING OF YB-171(+) IONS IN A LINEAR PAUL TRAP, Applied physics. B, Photophysics and laser chemistry, 57(4), 1993, pp. 287-291
We report laser cooling of trapped Yb-171+ ions. The ions are confined
in a linear Paul trap. Temperatures below 1 K have been achieved. and
evidence of a phase transition to a crystal-like state has been obser
ved. The metastable 2D3/2 level is drained using a transition at 609.1
nm not previously used for this purpose. Laser cooling of Yb-171+ may
be of importance to the development of new microwave frequency standa
rds.