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DOI | 10.1126/science.aay9531 |
Direct observation of bimolecular reactions of ultracold KRb molecules | |
Hu, M. -G.1,2,3; Liu, Y.1,2,3; Grimes, D. D.1,2,3; Lin, Y. -W.1,2,3; Gheorghe, A. H.2; Vexiau, R.4; Bouloufa-Maafa, N.4; Dulieu, O.4; Rosenband, T.2; Ni, K. -K.1,2,3 | |
2019-11-29 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 366期号:6469页码:1111-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | Femtochemistry techniques have been instrumental in accessing the short time scales necessary to probe transient intermediates in chemical reactions. In this study, we took the contrasting approach of prolonging the lifetime of an intermediate by preparing reactant molecules in their lowest rovibronic quantum state at ultralow temperatures, thereby markedly reducing the number of exit channels accessible upon their mutual collision. Using ionization spectroscopy and velocity-map imaging of a trapped gas of potassium-rubidium (KRb) molecules at a temperature of 500 nanokelvin, we directly observed reactants, intermediates, and products of the reaction (KRb)-K-40-Rb-87 + (KRb)-K-40-Rb-87 (sic) K2Rb2 * (sic) K-2 + Rb-2. Beyond observation of a long-lived, energy-rich intermediate complex, this technique opens the door to further studies of quantum-state-resolved reaction dynamics in the ultracold regime. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500039200039 |
WOS关键词 | HETERONUCLEAR ALKALI DIMERS ; CHEMICAL-REACTIONS ; DYNAMICS ; PHOTOELECTRON ; SPECTROSCOPY ; ABSORPTION ; RESONANCES ; IONS ; GAS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/226318 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA; 2.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA; 3.Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA; 4.Univ Paris Saclay, Univ Paris Sud, ENS Paris Saclay, Lab Aime Cotton,CNRS, F-91405 Orsay, France |
推荐引用方式 GB/T 7714 | Hu, M. -G.,Liu, Y.,Grimes, D. D.,et al. Direct observation of bimolecular reactions of ultracold KRb molecules[J]. SCIENCE,2019,366(6469):1111-+. |
APA | Hu, M. -G..,Liu, Y..,Grimes, D. D..,Lin, Y. -W..,Gheorghe, A. H..,...&Ni, K. -K..(2019).Direct observation of bimolecular reactions of ultracold KRb molecules.SCIENCE,366(6469),1111-+. |
MLA | Hu, M. -G.,et al."Direct observation of bimolecular reactions of ultracold KRb molecules".SCIENCE 366.6469(2019):1111-+. |
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