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research article

Dynamics of individual rotational states in an electrostatic guide for neutral molecules

Bertsche, Benjamin  
•
Osterwalder, Andreas  
2011
Physical Chemistry Chemical Physics

The guiding properties of individual rotational states of deuterated ammonia inside an electrostatic hexapole guide are presented. The guide is combined with resonance enhanced multiphoton ionization detection to assess the guiding probabilities and velocity distributions as a function of the rotational quantum numbers J and K. Due to the differences in the effective dipole moment these states are prepared at significantly different translational temperatures. A model is presented that describes the velocity-distribution for individual M-sublevels, and this model is also used to determine a rotational-state dependent translational temperature. Furthermore, the hexapole field has been replaced by a dipole field in order to obtain a band-pass velocity filter. However, the resulting change in the final velocity distribution is similar to that obtained from a hexapole guide but with increased backing pressure, leading to collisional acceleration of the slow molecules.

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Type
research article
DOI
10.1039/c1cp21277j
Web of Science ID

WOS:000296027500031

Author(s)
Bertsche, Benjamin  
Osterwalder, Andreas  
Date Issued

2011

Published in
Physical Chemistry Chemical Physics
Volume

13

Article Number

18954

Subjects

Cold Molecules

•

Velocity filter

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-SB-AO  
Available on Infoscience
September 29, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/71193
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