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- W2032069080 abstract "We have investigated high-density Rb optical pumping in polarized $^{3}mathrm{He}$ targets and present measurements of collisional relaxation rates and studies of diffusion-driven wall relaxation of the Rb polarization. We show that a boundary layer resides in the vicinity of the cell walls within which a polarization gradient is established by diffusion. Absorption of the incident laser radiation within this layer leads to a striking decrease in optical-pumping efficiency for resonant light but has little effect for off-resonant light. Our theory introduces polarization-dependent slowing of optical pumping rates due to the Rb nuclear spin. We have observed a strong frequency dependence of the optical-pumping efficiency, consistent with our theoretical predictions. We report the following rate constants for collisional relaxation of Rb polarization: due to Rb (${mathit{k}}_{mathrm{Rb}mathrm{ensuremath{-}}mathrm{Rb}}$=8ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}13}$ ${mathrm{cm}}^{3}$/s), due to ${mathrm{N}}_{2}$ (${mathit{k}}_{mathrm{N}2mathrm{ensuremath{-}}}$Rb=8ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}18}$ ${mathrm{cm}}^{3}$/s), and due to $^{3}mathrm{He}$, an upper limit of (${mathit{k}}^{3}$He-Rbensuremath{le}2ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}18}$ ${mathrm{cm}}^{3}$/s). The data and model presented are used to predict laser power and intensity requirements for high-density polarized $^{3}mathrm{He}$ targets." @default.
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- W2032069080 date "1994-05-01" @default.
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- W2032069080 title "Laser optical pumping of high-density Rb in polarized<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>targets" @default.
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- W2032069080 doi "https://doi.org/10.1103/physreva.49.3854" @default.
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