Delayed-detection measurement of atomic Na 3phyperfine structure using polarization quantum-beat spectroscopy
- 1 September 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 48 (3) , 1909-1915
- https://doi.org/10.1103/physreva.48.1909
Abstract
A subnatural linewidth measurement of magnetic-dipole and electric-quadrupole hyperfine coupling constants in the atomic Na 3p level are reported. The measurements are made using a pump–delayed-probe method, with delays ranging to 135 ns, more than eight times the natural lifetime of the 3p level. A measurement of hyperfine-induced beats in the time evolution of the electronic alignment permitted determination of the hyperfine frequencies to well beyond the natural width in that level. Hyperfine coupling constants A=18.534(15) MHz and B=2.724(30) MHz are obtained, these being more than 2 times more precise than any previous determination of those quantities.
Keywords
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