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- W2057641103 abstract "Hyperfine quantum-beat spectroscopy has been utilized in a pump-probe configuration to measure magnetic dipole (A) and electric quadrupole (B) coupling constants in the 3d${mathrm{}}^{2}$${mathrm{D}}_{3mathrm{/}2}$ and 3d${mathrm{}}^{2}$${mathrm{D}}_{5mathrm{/}2}$ levels of three isotopes of potassium. For many of these levels, the largest hyperfine splitting is smaller than the natural width, and so a subnatural linewidth technique is required. In the experiments, the 3d levels are excited on the 4d${mathrm{}}^{2}$${mathrm{S}}_{1mathrm{/}2}$ensuremath{rightarrow}3d${mathrm{}}^{2}$${mathrm{D}}_{mathrm{j}}$ quadrupole transition with linearly polarized light. Time evolution of the alignment components in the d levels is probed by time-delayed resonant radiation on the 3d${mathrm{}}^{2}$${mathrm{D}}_{mathrm{j}}$ensuremath{rightarrow}9p${mathrm{}}^{2}$${mathrm{P}}_{mathrm{j}}$ transitions. Comparison of the excitation rate for two orthogonal relative polarization directions of the pump and probe laser at each delay time permits derivation of a linear polarization degree. This quantity contains beats at the various hyperfine frequencies in the d levels. Fitting the experimentally obtained time dependence to theoretical expressions allows extraction of the hyperfine coupling constants. For the 3d${mathrm{}}^{2}$${mathrm{D}}_{3mathrm{/}2}$ level of $^{40}mathrm{K}$ we obtain A=0.96(4) MHz and B=0.37(8) MHz, indicating a typical precision also obtained for the other levels and isotopes." @default.
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- W2057641103 title "Measurement of hyperfine coupling constants in the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mn>3</mml:mn><mml:mi mathvariant=normal>d</mml:mi><mml:mi mathvariant=normal>t</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>D</mml:mi></mml:mrow><mml:mrow><…" @default.
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- W2057641103 doi "https://doi.org/10.1103/physreva.55.3475" @default.
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