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Issue 42, 2011
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Cold heteromolecular dipolar collisions

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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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Article information

15 Apr 2011
10 Aug 2011
First published
01 Sep 2011

Phys. Chem. Chem. Phys., 2011,13, 19059-19066
Article type

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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