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The Eu ions confined in an RF quadrupole trap, has been optically detected. Using a tunable dye laser which is pumped by a
Nd-YAG pulsed laser system, the resonance 9S4^9S_4–6p
3/2, J = 5 transition of the Eu ions have been excited and the resulting fluorescence to the metastable 9D4-6^9D_{4-6} state has been detected. In preparation to determine the ground-state hyperfine splitting of the odd isotopes we found the
optimum trapping operating point. We have also observed a number of instabilities inside the region of the stability for an
ideal trap. These non-linear resonances arise from higher-order contributions to the ideal quadrupole potential. 相似文献
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