Reaction Dynamics with Molecular Beams and Oriented Molecular Beams: A Tool for Looking Closer to Chemical Reactions and Photodissociations

2012 ◽  
Vol 59 (5) ◽  
pp. 567-582 ◽  
Author(s):  
Toshio Kasai ◽  
Dock-Chil Che ◽  
Po-Yu Tsai ◽  
King-Chuen Lin
Keyword(s):  
Chemical Reactions ◽  
Reaction Dynamics ◽  
Molecular Beams

Understanding mode-specific dynamics in the local mode representation

2018 ◽  
Vol 20 (29) ◽  
pp. 19647-19655 ◽  
Author(s):  
Hongwei Song ◽  
Minghui Yang
Keyword(s):  
Chemical Reactions ◽  
Reaction Dynamics ◽  
Local Mode ◽  
New Perspective ◽  
Elementary Chemical

Local mode representation provides a new perspective to understand reaction dynamics of elementary chemical reactions.

Dynamical resonances in chemical reactions

2018 ◽  
Vol 47 (17) ◽  
pp. 6744-6763 ◽  
Author(s):  
Tao Wang ◽  
Tiangang Yang ◽  
Chunlei Xiao ◽  
Zhigang Sun ◽  
Donghui Zhang ◽  
...  
Keyword(s):  
Transition State ◽  
Chemical Kinetics ◽  
Chemical Reactions ◽  
Reaction Dynamics

The transition state is a key concept in the field of chemistry and is important in the study of chemical kinetics and reaction dynamics.

scholarly journals High Resolution Spectroscopy With Molecular Beams and Tunable Lasers

1998 ◽  
Vol 18 (1-2) ◽  
pp. 1-11 ◽  
Author(s):  
R. Vetter ◽  
P. Luc ◽  
C. Amiot
Keyword(s):  
Electronic Structure ◽  
High Resolution ◽  
Diatomic Molecules ◽  
Reaction Dynamics ◽  
Molecular Beams ◽  
Tunable Lasers ◽  
High Resolution Spectroscopy ◽  
Absorption Bands ◽  
Quantum Numbers ◽  
Laser Techniques

High resolution Doppler-free laser techniques are used in beam experiments to improve the spectroscopic description of complex diatomic molecules. The case of TiO is considered here for its implication in reaction dynamics studies and its interest in Astrophysics. Two absorption bands in the visible have been analyzed: B3Π−X3 Δ(1−0) and c1Φ−a1 Δ(0−0). Owing to accurate wavenumber measurements, it has been possible to extend the analysis to high rotational quantum numbers and to carry out detailed spectroscopic calculations. They show that a careful revisiting of the TiO electronic structure is necessary.

Observing the stereodynamics of chemical reactions using randomly oriented molecular beams

2006 ◽  
Vol 124 (24) ◽  
pp. 241105 ◽  
Author(s):  
Magnus Gustafsson ◽  
Rex T. Skodje ◽  
Jianyang Zhang ◽  
Dongxu Dai ◽  
Steven A. Harich ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Molecular Beams

scholarly journals Dynamics of Molecular Processes and the Sustainable Development of Humanity

2017 ◽  
Vol 01 (01) ◽  
pp. 66-73
Author(s):  
Yuan Tseh Lee
Keyword(s):  
Sustainable Development ◽  
Global Warming ◽  
Chemical Reactions ◽  
Carbon Emissions ◽  
Molecular Beams ◽  
Reaction Products ◽  
Molecular Processes ◽  
The Sustainable Development ◽  
Single Collision ◽  
Elementary Chemical

Yuan Tseh Lee was instrumental in the development and construction of an apparatus that utilized crossed molecular beams, presenting a break-through technique that allowed for the understanding of the dynamics of elementary chemical reactions. This was done by following the trajectories of reactants and reaction products in single collision events, allowing the visualization of the dynamics of how chemical reactions take place. This article also highlights Prof. Lee’s belief in the severity of the consequences of global warming and his concerns relating to the need to substantially reduce carbon emissions.

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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