ar X iv : p hy si cs / 0 41 01 08 v 1 1 5 O ct 2 00 4 Accurate spectroscopy of Sr atoms
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چکیده
We report the frequency measurement with an accuracy in the 100 kHz range of several optical transitions of atomic Sr : 1S0 − 3P1 at 689 nm, 3P1 − 3S1 at 688 nm and 3P0 − 3S1 at 679 nm. Measurements are performed with a frequency chain based on a femtosecond laser referenced to primary frequency standards. They allowed the determination with a 70 kHz uncertainty of the energy of the 5s5p 3P0 state and the direct observation of the doubly forbidden 1S0 − 3P0 transition of Sr at 698 nm. Frequency measurements are performed for Sr and Sr, allowing the determination of 3P0, 3P1 and 3S1 isotope shifts, as well as the 3S1 hyperfine constants.
منابع مشابه
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تاریخ انتشار 2004