Quantum reactive scattering of ultracold NH(X³Σ-) radicals in a magnetic trap
Janssen, Liesbeth M. C. · van der Avoird, Ad · Groenenboom, Gerrit C.
Original · EN
We investigate the ultracold reaction dynamics of magnetically trapped NH(X ³Σ-) radicals using rigorous quantum scattering calculations involving three coupled potential energy surfaces. We find that the reactive NH + NH cross section is driven by a short-ranged collisional mechanism, and its magnitude is only weakly dependent on magnetic field strength. Unlike most ultracold reactions observed so far, the NH + NH scattering dynamics is non-universal. Our results indicate that chemical reactions can cause more trap loss than spin-inelastic NH + NH collisions, making molecular evaporative cooling more difficult than previously anticipated.
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