Measurement of {sup 129}Xe-Cs binary spin-exchange rate coefficient
- Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
We report the first measurement of the spin-exchange rate coefficient for binary collisions between Cs and {sup 129}Xe atoms in the temperature range 110<T<150 deg. C at a 9.4-T magnetic field. Under these conditions, binary spin-exchange collisions dominate the longitudinal nuclear spin-relaxation rate 1/T{sub 1} of {sup 129}Xe gas. We measured 1/T{sub 1} of a thermally polarized Xe gas using the saturation-recovery of conventional nuclear magnetic resonance. We also directly measured the Cs atomic number density [Cs] by using Faraday rotation of the linear polarization of a probing laser beam passing through the sample. The measured rate coefficient is {kappa}(9.4 T)=d(1/T{sub 1})/d[Cs]=(2.81{+-}0.2)x10{sup -16} cm{sup 3}/s, which is about a factor of 1.6 higher than the previously measured spin-exchange rate coefficient of {sup 129}Xe-Rb binary collisions. Using a calculated magnetic decoupling factor, we extrapolate our result to zero magnetic field: {kappa}(0 T)=(4.1{+-}0.3)x10{sup -16} cm{sup 3}/s.
- OSTI ID:
- 20643710
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic decoupling of {sup 129}Xe-Rb and {sup 129}Xe-Cs binary spin exchange
{sup 129}Xe-Cs (D{sub 1},D{sub 2}) versus {sup 129}Xe-Rb (D{sub 1}) spin-exchange optical pumping at high xenon densities using high-power laser diode arrays