Enhancement of Rb Fine-Structure Transfer in 4He Due to Three-Body Collisions
Physics and Astronomy
Mathematics and Natural Sciences
Using ultrafast laser excitation and time-correlated single-photon counting techniques, we have measured the collisional mixing rates between the rubidium 52P fine-structure levels in the presence of 4He gas. A nonlinear dependence of the mixing rate with 4He density is observed. We find Rb fine-structure transfer is primarily due to binary collisions at 4He densities of ≤1019cm-3, while at greater densities, three-body collisions become significant. We determine a three-body collisional transfer rate coefficient (52P3/2 → 52P1/2) of 1.25(9) × 10-32cm6/s at 22°C.
Sell, J. F.,
Knize, R. J.
(2010). Enhancement of Rb Fine-Structure Transfer in 4He Due to Three-Body Collisions. Optics Letters, 35(13), 2146-2148.
Available at: https://aquila.usm.edu/fac_pubs/766