Reaction kinetics of ultracold molecule-molecule collisions

被引:22
作者
Hoffmann, Daniel K. [1 ,2 ]
Paintner, Thomas [1 ,2 ]
Limmer, Wolfgang [1 ,2 ]
Petrov, Dmitry S. [3 ]
Denschlag, Johannes Hecker [1 ,2 ]
机构
[1] Univ Ulm, Inst Quantenmaterie, D-89069 Ulm, Germany
[2] Univ Ulm, Ctr Integrated Quantum Sci & Technol IQST, D-89069 Ulm, Germany
[3] Univ Paris Saclay, LPTMS, CNRS, Univ Paris Sud, F-91405 Orsay, France
来源
NATURE COMMUNICATIONS | 2018年 / 9卷
基金
欧洲研究理事会;
关键词
3-BODY RECOMBINATION; CHEMISTRY;
D O I
10.1038/s41467-018-07576-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Studying chemical reactions on a state-to-state level tests and improves our fundamental understanding of chemical processes. For such investigations it is convenient to make use of ultracold atomic and molecular reactants as they can be prepared in well defined internal and external quantum states. Here, we investigate a single-channel reaction of two Li-2-Feshbach molecules where one of the molecules dissociates into two atoms 2AB double right arrow AB + A + B. The process is a prototype for a class of four-body collisions where two reactants produce three product particles. We measure the collisional dissociation rate constant of this process as a function of collision energy/temperature and scattering length. We confirm an Arrhenius-law dependence on the collision energy, an a(4) power-law dependence on the scattering length a and determine a universal four body reaction constant.
引用
收藏
页数:6
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