Journal
PHYSICAL REVIEW A
Volume 83, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.022713
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Funding
- EPSRC
- Council for Chemical Sciences of the Netherlands Organization for Scientific Research (CW-NWO)
- EPSRC [EP/E039200/1, EP/I012044/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E039200/1, EP/I012044/1] Funding Source: researchfish
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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 (NH)-N-15 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.
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