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- W1964539144 abstract "Applying the cw laser absorption and fluorescence method the cross sections for the fine-structure mixing and quenching of the caesium 5DJ states have been measured in pure caesium vapour. Caesium atoms were optically excited to the 5D5/2 state via the quadrupole-allowed 6S1/2→5D5/2 transition. The ground-state caesium density N0, obtained from the absorption at the pumped quadrupole transition, and the fluorescence intensity I689 of the sensitized 5D3/2→6S1/2 emission were measured simultaneously in the range 3×1014 cm-3⩽N0⩽1×1016 cm-3 at constant temperature T = 585 K. It was found that the quantity N02/I689 exhibited a parabolic dependence on N0, confirming that the quenching of the Cs 5DJ states is due to collisions with Cs ground-state atoms, not molecules. The coefficients of the second-order polynomial fitted through the measured data yielded the cross sections σ5/2→3/2 = (57±19)×10-16 cm2 and σD = (35±10)×10-16 cm2 for the Cs 5DJ fine-structure mixing and quenching, respectively, due to collisions with caesium ground-state atoms. Using recently calculated Cs*+Cs potentials we performed an analysis which shows good agreement between the measured values and the theoretical predictions." @default.
- W1964539144 created "2016-06-24" @default.
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- W1964539144 date "2000-07-27" @default.
- W1964539144 modified "2023-10-18" @default.
- W1964539144 title "Mixing and quenching of the Cs 5DJstates induced by collisions with caesium ground-state atoms" @default.
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- W1964539144 doi "https://doi.org/10.1088/0953-4075/33/16/305" @default.
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