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Cold and ultracold NH-NH collisions in magnetic fields

Janssen, Liesbeth M.C.; Zuchowski, Piotr S.; van der Avoird, Ad; Groenenboom, Gerrit C.; Hutson, Jeremy M.

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Liesbeth M.C. Janssen

Piotr S. Zuchowski

Ad van der Avoird

Gerrit C. Groenenboom


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 15NH 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.


Janssen, L. M., Zuchowski, P. S., van der Avoird, A., Groenenboom, G. C., & Hutson, J. M. (2011). Cold and ultracold NH-NH collisions in magnetic fields. Physical Review A, 83(2), Article 022713.

Journal Article Type Article
Publication Date Jan 1, 2011
Deposit Date Jun 19, 2013
Publicly Available Date Jun 27, 2013
Journal Physical Review A
Print ISSN 1050-2947
Electronic ISSN 1094-1622
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 83
Issue 2
Article Number 022713


Published Journal Article (421 Kb)

Copyright Statement
© 2011 American Physical Society

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