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Issue 9, 2011
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Cold collisions of N (4S) atoms and NH (3Σ) molecules in magnetic fields

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Abstract

We calculate the interaction potential between N atoms and NH molecules and use it to investigate cold and ultracold collisions important for sympathetic cooling. The ratio of elastic to inelastic cross sections is large over a wide range of collision energy and magnetic field for most isotopic combinations, so that sympathetic cooling of NH molecules by N atoms is a good prospect. However, there are important effects due to a p-wave shape resonance that may inhibit cooling in some cases. We show that scaling the reduced mass used in the collision is approximately equivalent to scaling the interaction potential. We then explore the dependence of the scattering properties on the reduced mass and explain the resonant effects observed using angular-momentum-insensitive quantum defect theory.

Graphical abstract: Cold collisions of N (4S) atoms and NH (3Σ) molecules in magnetic fields

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Article information


Submitted
07 Aug 2010
Accepted
25 Oct 2010
First published
24 Dec 2010

Phys. Chem. Chem. Phys., 2011,13, 3669-3680
Article type
Paper

Cold collisions of N (4S) atoms and NH (3Σ) molecules in magnetic fields

P. S. Żuchowski and J. M. Hutson, Phys. Chem. Chem. Phys., 2011, 13, 3669
DOI: 10.1039/C0CP01447H

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