S-wave and p-wave scattering in a cold gas of Na and Rb atoms

Details S-wave and p-wave scattering in a cold gas of Na and Rb atoms S-wave and p-wave scattering in a cold gas of Na and Rb atoms

2008-02-11

arxiv.org/abs/0802.1222v2

Eur. Phys. J. D 53, 27-32 (2009)

Physics

Atomic Physics

The article contains additional material and data (see abstract)

Scientific paper

10.1140/epjd/e2009-00042-8

Using improved experimentally based $X{}^1\Sigma^+$ and $a{}^3\Sigma^+$ molecular potentials of NaRb, we apply the variable phase method to compute new data for low energy scattering of $^{23}$Na atoms by $^{85}$Rb atoms and $^{87}$Rb atoms. These are the scattering lengths and volumes, numbers of bound states and effective ranges, which we use to obtain the low energy spin-change cross section as functions of the system temperature and the isotope masses. From an analysis of the contributions of s-wave and p-wave scatterings to the elastic cross section we estimate temperatures below which only s-wave scattering is dominant. We compare our quantal results to data obtained from the semiclassical approximation. We supply evidence for the existence of a near zero energy p-wave bound state supported by the singlet molecular potential.

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