# Cold Heteromolecular Dipolar Collisions

 Title: Cold Heteromolecular Dipolar Collisions Author: Sawyer, Brian C.; Stuhl, Benjamin K.; Yeo, Mark; Tscherbul, Timur V.; Hummon, Matthew T.; Xia, Yong; Klos, Jacek; Patterson, David; Doyle, John M.; Ye, Jun Note: Order does not necessarily reflect citation order of authors. Citation: Sawyer, Brian C., Benjamin K. Stuhl, Mark Yeo, Timur V. Tscherbul, Matthew T. Hummon, Yong Xia, Jacek Klos, David Patterson, John M. Doyle, and Jun Ye. 2011. Cold heteromolecular dipolar collisions. Physical Chemistry Chemical Physics 13(42): 19059-19066. Full Text & Related Files: 1008.5127v1.pdf (1.334Mb; PDF) 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 $$ND_3$$ 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 $$^{2}\Pi$$ radical and a closed-shell polyatomic molecule. Published Version: doi:10.1039/C1CP21203F Other Sources: http://arxiv.org/abs/1008.5127 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5349610

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Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University