The measurement of the ratio of the repolarization signal to the optical pumping signal of the Rb atoms has been used to determine the ratio χ of the spin rotation coupling constant to the spin exchange coupling constant of the 87 Rb 129 Xe Van der Waals molecule. The value χ=3.4±0.1 is inferred from these studies. The author has also given the magnitudes of the spin rotation and spin exchange interactions.

Chinese Physics LettersJul 1, 19851 citation

Springer series in chemical physics

Spin Repolarization in Interacting Exciton Gas

Th. Amand, D. Robart, X. Marie, M. Brousseau, P. Le Jeune, J. Barrau

Published Jan 1, 1996• 0 citations

Publisher

DOI: 10.1007/978-3-642-80314-7_164

Related papers

Cooling of interacting-exciton gas

R. Baltramiejūnas, ARTŪRAS ŽUKAUSKAS, Gintautas Tamulaitis

Jul 1, 19857 citations

Measurements of 3He spin-exchange rates

Bien Chann, Earl Babcock, L. W. Anderson +1 more

Spin-exchange rate coefficients for Rb- ${}^{3}\mathrm{He}$ are measured using three different methods. Two methods, using Rb repolarization and rate balance, require no assumption about the nature of the ${}^{3}\mathrm{He}$ wall relaxation and agree well; we find spin-exchange rate coefficients of $6.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}$ and $6.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}.$ These results agree with a recent repolarization measurement of Baranga and co-workers [Phys. Rev. Lett. 80, 2801 (1998)]. The third method uses the temperature dependence of the ${}^{3}\mathrm{He}$ relaxation and is 30% larger than the other two, implying a temperature-dependent wall or an unreasonably large value of the anisotropic spin-exchange interaction for $\mathrm{Rb}{\ensuremath{-}}^{3}\mathrm{He}.$ In the course of these measurements we developed and tested a new method for Rb density measurements under high power pumping conditions, and a new variant of Rb EPR polarimetry, both of which are described here.Spin-exchange rate coefficients for Rb-${}^{3}\mathrm{He}$ are measured using three different methods. Two methods, using Rb repolarization and rate balance, require no assumption about the nature of the ${}^{3}\mathrm{He}$ wall relaxation and agree well; we find spin-exchange rate coefficients of $6.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}$ and $6.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}.$ These results agree with a recent repolarization measurement of Baranga and co-workers [Phys. Rev. Lett. 80, 2801 (1998)]. The third method uses the temperature dependence of the ${}^{3}\mathrm{He}$ relaxation and is 30% larger than the other two, implying a temperature-dependent wall or an unreasonably large value of the anisotropic spin-exchange interaction for $\mathrm{Rb}{\ensuremath{-}}^{3}\mathrm{He}.$ In the course of these measurements we developed and tested a new method for Rb density measurements under high power pumping conditions, and a new variant of Rb EPR polarimetry, both of which are described here.

Physical Review ASep 13, 200267 citations

Spin polarization in a two-dimensional electron gas

B. Davoudi, Monica Tosi

arXiv:cond-mat/0107519Physica B Condensed MatterAug 26, 200210 citations

Progress towards trapping {sup 82}Rb in an optical trap

Ralf Guckert, V. D. Sandberg, D. Tupa +2 more

The efficient coupling of an optical trap to a mass separator is being developed to undertake high-precision electroweak interaction measurements. The use of an ion implantation and subsequent heated foil release method is being pursued as a suitable way of introducing radioactive samples into the ultra high vacuum region of the optical trap without gas loading. The batchwise trapping and cooling of one million {sup 82}Rb atoms is envisioned with overall efficiencies of 1% or more. The cloud of cold radioactive atoms ({approximately}1 mm in diameter) will than be spin polarized and transferred to a second optical trap, repolarized, and loaded in a magnetic trap in which a beta-asymmetry measurement will be performed. The latest developments towards undertaking this experiment will be presented.The efficient coupling of an optical trap to a mass separator is being developed to undertake high-precision electroweak interaction measurements. The use of an ion implantation and subsequent heated foil release method is being pursued as a suitable way of introducing radioactive samples into the ultra high vacuum region of the optical trap without gas loading. The batchwise trapping and cooling of one million {sup 82}Rb atoms is envisioned with overall efficiencies of 1% or more. The cloud of cold radioactive atoms ({approximately}1 mm in diameter) will than be spin polarized and transferred to a second optical trap, repolarized, and loaded in a magnetic trap in which a beta-asymmetry measurement will be performed. The latest developments towards undertaking this experiment will be presented.

Dec 31, 19970 citations

of fermion exchanges on the polarization of exciton condensates

Monique Combescot, R. Combescot, Mathieu Alloing

Jan 1, 20140 citations

Determination of the spin coupling constants in the 87 Rb 129 Xe Van der Waals molecule

Zeng Xi-zhi

Chinese Physics LettersJul 1, 19851 citation

Spin-exchange rate coefficients for Rb-

{}^{3}\mathrm{He}

are measured using three different methods. Two methods, using Rb repolarization and rate balance, require no assumption about the nature of the

{}^{3}\mathrm{He}

wall relaxation and agree well; we find spin-exchange rate coefficients of $6.7\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}$ and $6.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}{\mathrm{cm}}^{3}/\mathrm{s}.$ These results agree with a recent repolarization measurement of Baranga and co-workers [Phys. Rev. Lett. 80, 2801 (1998)]. The third method uses the temperature dependence of the

{}^{3}\mathrm{He}

relaxation and is 30% larger than the other two, implying a temperature-dependent wall or an unreasonably large value of the anisotropic spin-exchange interaction for $\mathrm{Rb}{\ensuremath{-}}^{3}\mathrm{He}.$ In the course of these measurements we developed and tested a new method for Rb density measurements under high power pumping conditions, and a new variant of Rb EPR polarimetry, both of which are described here.