Xe129-Cs (D1,D2) versus Xe129-Rb (D1) spin-exchange optical pumping at high xenon densities using high-power laser diode arrays
Abstract
We investigate Xe129-Cs (D1,D2) spin exchange optical pumping (SEOP) at high Xe densities (~0.12-2.44 amagat) using newly available high-power (>40 W) laser diode arrays and compare with Xe129-Rb D1 SEOP under similar conditions. At elevated Xe densities, the spin-exchange rate (per alkali-metal atom, γ') for Cs-Xe129 is ~1.5-fold greater than that for Rb-Xe129. Higher spin-exchange rates and lower Xe129 spin-destruction rates for Cs-Xe129 versus Rb-Xe129 contribute to ~twofold improvement in Xe129 nuclear spin polarization measured at 9.4 T—with the largest gains observed at the highest Xe densities.
- Publication:
-
Physical Review A
- Pub Date:
- May 2011
- DOI:
- 10.1103/PhysRevA.83.053428
- Bibcode:
- 2011PhRvA..83e3428W
- Keywords:
-
- 32.80.Xx;
- 42.55.Px;
- 82.56.-b;
- 87.61.-c;
- Level crossing and optical pumping;
- Semiconductor lasers;
- laser diodes;
- Nuclear magnetic resonance;
- Magnetic resonance imaging