Abstract
The collision cross section that controls thermalization of gas mixtures is the transport cross section and not the elastic cross section . The two are the same for pure -wave scattering but not when higher partial waves contribute. We investigate the differences between them for prototype atomic mixtures and show that the distinction is important at energies above for LiYb and for RbYb and RbCs. For simple systems, both and follow universal energy dependence that depends only on the -wave scattering length when expressed in reduced length and energy units.
- Received 5 March 2014
DOI:https://doi.org/10.1103/PhysRevA.89.052705
©2014 American Physical Society