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research article

Sub-Kelvin stereodynamics of the Ne(3P2)+N2 reaction

Zou, Junwen  
•
Gordon, Sean Dennis Steven  
•
Osterwalder, Andreas  
2019
Physical Review Letters

We present an experimental study of the low-energy stereodynamics of the Ne(3P2)+N2 reaction. Supersonic expansions of the two reactants are superposed in a merged beam experiment, where individual velocity control of the two beams allows us to reach average relative velocities of zero, yielding minimum collision energies around 60 mK. We combine the merged beam technique with the orientation of the metastable neon atoms and measure the branching between two reaction channels, Penning ionisation and associative ionisation, as a function of neon orientation and collision energy, covering the range 0.06 -- 700 K. We find that we lose the ability to orient Ne below \approx 100 K due to dynamic reorientation. Associative ionisation products, Ne-N2+, predissociate with a probability of 25% -- 35% and that associative ionisation is entirely due to reactions of the \Omega=2 state, where the singly occupied p-orbital of the Ne* is oriented along the interatomic axis.

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Type
research article
DOI
10.1103/PhysRevLett.123.133401
Web of Science ID

WOS:000487744600005

Author(s)
Zou, Junwen  
Gordon, Sean Dennis Steven  
Osterwalder, Andreas  
Date Issued

2019

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Letters
Volume

123

Issue

13

Article Number

133401

Subjects

Cold Molecules

•

Cold Chemisty

•

Stereodynamics

•

Penning Ioinsation

•

Orientation

Note

Accepted 22 August 2019

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-SB-AO  
FunderGrant Number

FNS

200021_165975

H2020

665667

Available on Infoscience
September 1, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/160761
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