Cold N+NH Collisions in a Magnetic Trap

Details Cold N+NH Collisions in a Magnetic Trap Cold N+NH Collisions in a Magnetic Trap

2010-09-13

arxiv.org/abs/1009.2513v1

Phys. Rev. Lett. 106, 053201 (2011)

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevLett.106.053201

We present an experimental and theoretical study of atom-molecule collisions in a mixture of cold, trapped atomic nitrogen and NH molecules at a temperature of $\sim 600$~mK. We measure a small N+NH trap loss rate coefficient of $k^{(\mathrm{N+NH})}_\mathrm{loss} = 8(4) \times 10^{-13}$~cm$^{3}$s$^{-1}$. Accurate quantum scattering calculations based on {\it 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.

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