J L Bohn et al 2009 New J. Phys. 11 055039 doi:10.1088/1367-2630/11/5/055039
Quasi-universal dipolar scattering in cold and ultracold gases
Focus on Cold and Ultracold MoleculesJ L Bohn1,4, M Cavagnero2 and C Ticknor3
Show affiliationsPart of Focus on Cold and Ultracold Molecules
We investigate the scattering cross section of aligned dipolar molecules in low-temperature gases. Over a wide range of collision energies relevant to contemporary experiments, the cross section declines in inverse proportion to the collision speed, and is given nearly exactly by a simple semiclassical formula. At yet lower energies, the cross section becomes independent of energy, and is reproduced within the Born approximation to within corrections due to the s-wave scattering length. While these behaviors are universal for all polar molecules, nevertheless interesting deviations from universality are expected to occur in the intermediate energy range.
- PACS
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34.50.-s Scattering of atoms and molecules
31.15.-p Calculations and mathematical techniques in atomic and molecular physics
- Subjects
- Dates
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Issue 5 (May 2009)
Received 9 January 2009
Published 14 May 2009
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Quasi-universal dipolar scattering in cold and ultracold gases
J L Bohn et al 2009 New J. Phys. 11 055039
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