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

Zuchowski, Piotr S. and Hutson, Jeremy M. (2011) 'Cold collisions of N (S-4) atoms and NH ((3)Sigma) molecules in magnetic fields.', Physical chemistry chemical physics., 13 (9). pp. 3669-3680.

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.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1039/c0cp01447h
Date accepted:No date available
Date deposited:27 June 2013
Date of first online publication:2011
Date first made open access:No date available

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