Cold collisions of highly rotationally excited CO2 with He: The prospects for cold chemistry with super-rotors

被引:11
作者
al-Qady, W. H. [1 ,2 ]
Forrey, R. C. [3 ]
Yang, B. H. [1 ,2 ]
Stancil, P. C. [1 ,2 ]
Balakrishnan, N. [4 ]
机构
[1] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA
[2] Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA
[3] Penn State Univ, Dept Phys, Reading, PA 19610 USA
[4] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA
来源
PHYSICAL REVIEW A | 2011年 / 84卷 / 05期
基金
美国国家科学基金会;
关键词
MOLECULES;
D O I
10.1103/PhysRevA.84.054701
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Building on recent advances in ultrafast lasers and methods to slow molecules, an experiment is proposed to produce translationally cold CO2 super-rotors (j similar to 200) by combining an optical centrifuge with helium-buffer-gas cooling. Quantum mechanical calculations of the complex scattering length for He-CO2 collisions demonstrate that the efficiency of rotational quenching decreases rapidly with increasing rotational excitation j in the ultracold regime. Extrapolating to helium cryogenic temperatures, rotational quenching is predicted to remain inefficient up to similar to 1 K, allowing for the possible creation of a beam of translationally cold, rotationally hot molecules.
引用
收藏
页数:4
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