Accurate He polarimetry using the Rb Zeeman frequency shift due to the Rb-He spin-exchange collisions

He polarization-dependent EPR frequency shifts of alkali-metal–He pairs

We present temperature-dependent measurements of the EPR frequency shifts for Na, K, and Rb interacting with polarized He. K and Na frequency shifts were measured via comparison with Rb frequency shifts swell known at low temperaturesd in Na-RbHe and K-RbHe spin-exchange cells. The lowered Rb vapor pressure of these “hybrid” spin-exchange cells also allowed us to extend the measured temperature...

Anisotropic relaxation in spin-exchange collisions of alkali atoms

Spin-exchange optical pumping [1] uses spin-exchange collisions between He atoms and optically pumped Rb atoms to produce large quantities of highly spin-polarized He for a variety of applications, including medical imaging [2] and spin-polarized targets [3]. The efficiency of polarized He production is determined by two fundamental rates: the Rb-He spin-exchange rate and the Rb spinrelaxation ...

Collision-induced spin exchange of alkali-metal atoms with He: An ab initio study

We present a rigorous quantum study of spin-exchange transitions in collisions of the alkali-metal atoms with He in the presence of an external magnetic field. Using accurate ab initio interaction potentials, we obtain refined estimates for the Fermi contact interaction constants for complexes of Na, K, and Rb atoms with He. Ab initio calculations show that the Fermi contact interaction in Li-H...

Measurement of the 21 Ne Zeeman frequency shift due to Rb- 21 Ne collisions

^{3}He-^{129}Xe Comagnetometery using ^{87}Rb Detection and Decoupling.

We describe a ^{3}He-^{129}Xe comagnetometer using ^{87}Rb atoms for noble-gas spin polarization and detection. We use a train of ^{87}Rb π pulses and σ^{+}/σ^{-} optical pumping to realize a finite-field Rb magnetometer with suppression of spin-exchange relaxation. We suppress frequency shifts from polarized Rb by measuring the ^{3}He and ^{129}Xe spin precession frequencies in the dark, while...