Cold and ultracold NH-NH collisions in magnetic fields

L.M.C. Janssen, P.S. Zuchowski, A. van der Avoird, G.C. Groenenboom, J.M. Hutson

Research output: Contribution to journalArticleAcademicpeer-review

39 Citations (Scopus)


Elastic and spin-changing inelastic collision cross sections are presented for cold and ultracold magnetically trapped NH. The cross sections are obtained from coupled-channel scattering calculations as a function of energy and magnetic field. We specifically investigate the influence of the intramolecular spin-spin, spin-rotation, and intermolecular magnetic dipole coupling on the collision dynamics. It is shown that N15H is a very suitable candidate for evaporative cooling experiments. The dominant trap-loss mechanism in the ultracold regime originates from the intermolecular dipolar coupling term. At higher energies and fields, intramolecular spin-spin coupling becomes increasingly important. Our qualitative results and conclusions are fairly independent of the exact form of the potential and of the size of the channel basis set.

Original languageEnglish
Article number022713
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Issue number2
Publication statusPublished - 28 Feb 2011
Externally publishedYes


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