We report the direct frequency measurement of the visible [Formula presented] intercombination line of strontium that is considered a possible candidate for a future optical-frequency standard. The frequency of a cavity-stabilized laser is locked to the saturated fluorescence in a thermal Sr atomic beam and is measured with an optical-frequency comb generator referenced to the SI second through a global positioning system signal. The [Formula presented] transition is measured to be at 434829121311 (10) kHz. We measure also the [Formula presented] isotope shift to be 163817.4 (0.2) kHz. © 2003 The American Physical Society.
Precision frequency measurement of visible intercombination lines of strontium / Ferrari, G.; Cancio, P.; Drullinger, R.; Giusfredi, G.; Poli, N.; Prevedelli, M.; Toninelli, C.; Tino, G. M.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 91:24(2003). [10.1103/PhysRevLett.91.243002]
Precision frequency measurement of visible intercombination lines of strontium
Ferrari G.;
2003-01-01
Abstract
We report the direct frequency measurement of the visible [Formula presented] intercombination line of strontium that is considered a possible candidate for a future optical-frequency standard. The frequency of a cavity-stabilized laser is locked to the saturated fluorescence in a thermal Sr atomic beam and is measured with an optical-frequency comb generator referenced to the SI second through a global positioning system signal. The [Formula presented] transition is measured to be at 434829121311 (10) kHz. We measure also the [Formula presented] isotope shift to be 163817.4 (0.2) kHz. © 2003 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
