# Cold N + NH Collisions in a Magnetic Trap

 Title: Cold N + NH Collisions in a Magnetic Trap Author: Hummon, Matthew T.; Tscherbul, Timur V.; Klos, Jacek; Lu, Hsin-I; Tsikata, Edem; Campbell, Wesley C.; Dalgarno, Alexander; Doyle, John M. Note: Order does not necessarily reflect citation order of authors. Citation: Hummon, Matthew T., Timur V. Tscherbul, Jacek Klos, Hsin-I Lu, Edem Tsikata, Wesley C. Campbell, Alexander Dalgarno, and John M. Doyle. 2011. Cold N + NH collisions in a magnetic trap. Physical Review Letters 106(5): 053201. Full Text & Related Files: PhysRevLett_106_053201.pdf (425.4Kb; PDF) Abstract: We present an experimental and theoretical study of atom-molecule collisions in a mixture of cold, trapped N atoms and NH molecules at a temperature of ∼600  mK. We measure a small N + NH trap loss rate coefficient of $$\kappa_{loss^{(N+NH)}}$$ = 9(5)(3)×10$$^{-13}$$  cm$$^3$$ s$$^{-1}$$. Accurate quantum scattering calculations based on ab initio interaction potentials are in agreement with experiment and indicate the magnetic dipole interaction to be the dominant loss mechanism. Our theory further indicates the ratio of N + NH elastic-to-inelastic collisions remains large (>100) into the mK regime. Published Version: 10.1103/PhysRevLett.106.053201 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5168868 Downloads of this work: