Abstract
A 303-MHz hyperfine transition in the ground state of ‘Be + was used as a basis of a frequency standard. The ions were stored in a Penning ion trap. Linewidths as narrow as 900μ Hz were obtained. The frequency stability was measured to be better than 3 x 10-2T-1/2. The inaccuracy in the second-order Doppler shift was reduced to 5 parts in 1015by laser cooling. An apparent pressure shift with an unexpectedly large value was discovered which limits the accuracy of the current experiment to approximately 1 part in 1013. © 1991 IEEE
Cite
CITATION STYLE
Bollinger, J. J., Heinzen, D. J., Itano, W. M., Gilbert, S. L., & Wineland, D. J. (1991). A 303-mhz frequency standard based on trapped be+ ions. IEEE Transactions on Instrumentation and Measurement, 40(2), 126–128. https://doi.org/10.1109/TIM.1990.1032897
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