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Prospects for producing ultracold NH(3) molecules by sympathetic cooling : a survey of interaction potentials

Zuchowski, Piotr S.; Hutson, Jeremy M.

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Authors

Piotr S. Zuchowski



Abstract

We investigate the possibility of producing ultracold NH3 molecules by sympathetic cooling in a bath of ultracold atoms. We consider the interactions of NH3 with alkali-metal and alkaline-earth-metal atoms, and with Xe, using ab initio coupled-cluster calculations. For Rb-NH3 and Xe-NH3 we develop full potential energy surfaces, while for the other systems we characterize the stationary points (global and local minima and saddle points). We also calculate isotropic and anisotropic van der Waals C6 coefficients for all the systems. The potential energy surfaces for interaction of NH3 with alkali-metal and alkaline-earth-metal atoms all show deep potential wells and strong anisotropies. The well depths vary from 887 cm−1 for Mg-NH3 to 5104 cm−1 for Li-NH3. This suggests that all these systems will exhibit strong inelasticity whenever inelastic collisions are energetically allowed and that sympathetic cooling will work only when both the atoms and the molecules are already in their lowest internal states. Xe-NH3 is more weakly bound and less anisotropic.

Citation

Zuchowski, P. S., & Hutson, J. M. (2008). Prospects for producing ultracold NH(3) molecules by sympathetic cooling : a survey of interaction potentials. Physical Review A, 78(2), Article 022701. https://doi.org/10.1103/physreva.78.022701

Journal Article Type Article
Publication Date Aug 1, 2008
Deposit Date Jun 19, 2013
Publicly Available Date Mar 28, 2024
Journal Physical Review A
Print ISSN 1050-2947
Electronic ISSN 1094-1622
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 78
Issue 2
Article Number 022701
DOI https://doi.org/10.1103/physreva.78.022701

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Copyright Statement
© 2008 The American Physical Society




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