Cold heteromolecular dipolar collisions

被引：80

作者：

Sawyer, Brian C. ^{[1
,2
]}

Stuhl, Benjamin K. ^{[1
,2
]}

Yeo, Mark ^{[1
,2
]}

Tscherbul, Timur V. ^{[3
,4
]}

Hummon, Matthew T. ^{[1
,2
]}

Xia, Yong ^{[1
,2
,5
]}

Kios, Jacek ^{[6
]}

Patterson, David ^{[3
]}

Doyle, John M. ^{[3
]}

Ye, Jun ^{[1
,2
]}

机构：

[1] Univ Colorado, Natl Inst Stand & Technol, JILA, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Harvard Univ, Dept Phys, Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA

[4] Harvard Smithsonian Ctr Astrophys, ITAMP, Cambridge, MA 02138 USA

[5] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China

[6] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 42期

基金：

美国国家科学基金会;

关键词：

ROTATIONALLY INELASTIC-SCATTERING; STERIC ASYMMETRY; MOLECULES; PROPENSITIES;

D O I：

10.1039/c1cp21203f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 (2)Pi radical and a closed-shell polyatomic molecule.

引用

页码：19059 / 19066

页数：8

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