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Issue 42, 2011
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Cold heteromolecular dipolar collisions

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Abstract

Cold molecules promise to reveal a rich set of novel collision dynamics in the low-energy regime. By combining for the first time the techniques of Stark deceleration, magnetic trapping, and cryogenic buffer gas cooling, we present the first experimental observation of cold collisions between two different species of state-selected neutral polar molecules. This has enabled an absolute measurement of the total trap loss cross sections between OH and ND3 at a mean collision energy of 3.6 cm−1 (5 K). Due to the dipolar interaction, the total cross section increases upon application of an external polarizing electric field. Cross sections computed from ab initio potential energy surfaces are in agreement with the measured value at zero external electric field. The theory presented here represents the first such analysis of collisions between a 2Π radical and a closed-shell polyatomic molecule.

Graphical abstract: Cold heteromolecular dipolar collisions

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Publication details

The article was received on 15 Apr 2011, accepted on 10 Aug 2011 and first published on 01 Sep 2011


Article type: Paper
DOI: 10.1039/C1CP21203F
Citation: Phys. Chem. Chem. Phys., 2011,13, 19059-19066
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    Cold heteromolecular dipolar collisions

    B. C. Sawyer, B. K. Stuhl, M. Yeo, T. V. Tscherbul, M. T. Hummon, Y. Xia, J. Kłos, D. Patterson, J. M. Doyle and J. Ye, Phys. Chem. Chem. Phys., 2011, 13, 19059
    DOI: 10.1039/C1CP21203F

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