Molecular collisions coming into focus.

@article{Onvlee2014MolecularCC,
  title={Molecular collisions coming into focus.},
  author={Jolijn Onvlee and Sjoerd N. Vogels and Alexander von Zastrow and David H. Parker and Sebastiaan Y. T. van de Meerakker},
  journal={Physical chemistry chemical physics : PCCP},
  year={2014},
  volume={16 30},
  pages={
          15768-79
        }
}
The Stark deceleration method exploits the concepts of charged particle accelerator physics to produce beams of neutral polar molecules with an almost perfect quantum state purity, a tunable velocity and a narrow velocity distribution. These monochromatic molecular beams offer interesting perspectives for precise studies of molecular scattering processes, in particular when used in conjunction with state-of-the-art laser-based detection techniques such as velocity map imaging. Here, we describe… 
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20 Citations
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Methods Citations
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20 Citations

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Citation Type

Analysis of velocity-mapped ion images from high-resolution crossed-beam scattering experiments: a tutorial review
TLDR
Using a high-resolution data set on inelastic collisions of velocity-controlled NO radicals with Ne atoms, the challenges met by the high resolution are described, and methods to mitigate or overcome them are presented.
High-resolution imaging of molecular collisions using a Zeeman decelerator.
TLDR
The narrow velocity spreads of Zeeman decelerated NO (X2Π3/2, j = 3/2) radicals result in high-resolution scattering images, thereby fully resolving quantum diffraction oscillations in the angular scattering distribution for inelastic NO-Ne collisions and product-pair correlations in the radial scattering distribution.
Optimal beam sources for Stark decelerators in collision experiments: a tutorial review
TLDR
This work describes a protocol to characterize the valve, and to optimally load the pulse of molecules into the decelerator, and characterize the valves regarding opening time duration, optimal valve-to-skimmer distance, mean velocity, velocity spread, state purity, and relative intensity.
Imaging resonances in low-energy NO-He inelastic collisions
TLDR
Slowing down two intersecting beams of helium atoms and nitric oxide molecules to a relative crawl revealed short-lived resonances that matched theoretical predictions remarkably well—a striking feat on both sides, given the challenge of accurately modeling NO's unpaired electron.
Experimental search for scattering resonances in near cold molecular collisions
We review the experimental findings on scattering resonances in molecular collisions occurring in the energy domain equivalent to temperatures of a few Kelvin. We discuss the conditions required to…
Unraveling Cold Molecular Collisions: Stark Decelerators in Crossed-Beam Experiments.
TLDR
The first generation of these "cold and controlled" scattering experiments that have been conducted in the last decade are reviewed and the prospects for this emerging field of research in the years to come are discussed.
Resolving rainbows with superimposed diffraction oscillations in NO + rare gas scattering: experiment and theory
A Stark decelerator is used in combination with velocity map imaging to study collisions of NO radicals with rare gas atoms in a counterpropagating crossed beam geometry. This powerful combination of…
Imaging diffraction oscillations for inelastic collisions of NO radicals with He and D2.
TLDR
Differences in the differential cross sections directly reflect the larger size of D2 as compared to He, which is in excellent agreement with the cross sections obtained from quantum close-coupling scattering calculations based on accurate ab initio NO-He and NO-D2 potential energy surfaces.
Observation of correlated excitations in bimolecular collisions
Although collisions between atoms and molecules are largely understood, collisions between two molecules have proven much harder to study. In both experiment and theory, our ability to determine…
Multistage Zeeman deceleration of atomic and molecular oxygen
Multistage Zeeman deceleration is a technique used to reduce the velocity of neutral molecules with a magnetic dipole moment. Here we present a Zeeman decelerator that consists of 100 solenoids and…
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References

SHOWING 1-10 OF 77 REFERENCES
State-to-state inelastic scattering of Stark-decelerated OH radicals with Ar atoms.
TLDR
The Stark deceleration method exploits the concepts of charged particle accelerator physics to produce molecular beams with a tunable velocity to compete with state-of-the-art beam methods that are used for scattering studies throughout.
State-resolved diffraction oscillations imaged for inelastic collisions of NO radicals with He, Ne and Ar.
TLDR
A Stark decelerator is used to form a beam of state-selected and velocity-controlled NO radicals and measure state-to-state differential cross-sections for inelastic collisions of NO with He, Ne and Ar atoms using velocity map imaging to fully resolving quantum diffraction oscillations.
Near-Threshold Inelastic Collisions Using Molecular Beams with a Tunable Velocity
TLDR
A molecular beam of OH radicals with a narrow velocity distribution and a tunable absolute velocity was formed by passing the beam through a Stark decelerator, and excellent agreement was obtained with cross-sections derived from coupled-channel calculations on ab initio computed potential energy surfaces.
Observation of Partial Wave Resonances in Low-Energy O2–H2 Inelastic Collisions
TLDR
The close agreement between experimental and theoretical results confirms the classically forbidden character of this collision-induced transition, which occurs exclusively in a purely quantum mechanical regime via shape and Feshbach resonances arising from partial waves with total angular momentum.
Chemical reaction dynamics with molecular beams
This review describes advances which have occurred during the past decade in chemical reaction dynamics using crossed molecular beams. After a brief historical introduction, advances in the…
Taming molecular beams
The motion of neutral molecules in a beam can be manipulated with inhomogeneous electric and magnetic fields. Static fields can be used to deflect or focus molecules, whereas time-varying fields can…
Cold and ultracold molecules: spotlight on orbiting resonances.
TLDR
Some of the background and motivation for studying collisions at low energies are highlighted and this spotlight article will direct readers to recent articles on the recent experimental advancements.
Scattering resonances in slow NH3-He collisions.
TLDR
This work theoretically study slow collisions of NH(3) molecules with He atoms, where it focuses in particular on the observation of scattering resonances, finding pronounced shape and Feshbach resonances for inelastic collisions into the symmetric umbrella state.
Application of time-sliced ion velocity imaging to crossed molecular beam experiments
A three-dimensional (3D) ion velocity imaging method was developed to measure the product velocity distributions in crossed molecular beam experiments. While maintaining conventional two-dimension…
Quantum-State Resolved Bimolecular Collisions of Velocity-Controlled OH with NO Radicals
TLDR
Measurement of state-resolved inelastic scattering cross sections for collisions between two open-shell molecules that are both prepared in a single quantum state reveals the crucial role of electrostatic forces in complex molecular collision processes.
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