Quantum-state resolved reaction dynamics at the gas-liquid interface: Direct absorption detection of HF(v,J) product from F(P2)+Squalane

2006 ◽  
Vol 125 (2) ◽  
pp. 021101 ◽  
Author(s):  
Alexander M. Zolot ◽  
Warren W. Harper ◽  
Bradford G. Perkins ◽  
Paul J. Dagdigian ◽  
David J. Nesbitt
Keyword(s):  
Quantum State ◽  
Reaction Dynamics ◽  
Liquid Interface ◽  
Direct Absorption ◽  
Quantum State Resolved

scholarly journals Direct observation of bimolecular reactions of ultracold KRb molecules

Science ◽  
2019 ◽  
Vol 366 (6469) ◽  
pp. 1111-1115 ◽  
Author(s):  
M.-G. Hu ◽  
Y. Liu ◽  
D. D. Grimes ◽  
Y.-W. Lin ◽  
A. H. Gheorghe ◽  
...  
Keyword(s):  
Quantum State ◽  
Chemical Reactions ◽  
Reaction Dynamics ◽  
Velocity Map Imaging ◽  
Bimolecular Reactions ◽  
Quantum State Resolved ◽  
Trapped Gas ◽  
Short Time ◽  
Transient Intermediates ◽  
Mutual Collision

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 40K87Rb + 40K87Rb → K2Rb2* → K2 + Rb2. 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.

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