Stereodynamics of Ne( 3 P 2 ) reacting with Ar, Kr, Xe, and N 2

Stereodynamics experiments of Ne( P ) reacting with Ar, Kr, Xe, and N leading to Penning and associative ionization have been performed in a crossed molecular beam apparatus. A curved magnetic hexapole was used to state-select and polarize Ne( P ) atoms which were then oriented in a rotatable magnet...

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Bibliographic Details
Published in:The Journal of chemical physics 2018-04, Vol.148 (16), p.164310
Main Authors: Zou, Junwen, Gordon, Sean D S, Tanteri, Silvia, Osterwalder, Andreas
Format: Article
Language:English
Online Access:Get full text
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Summary:Stereodynamics experiments of Ne( P ) reacting with Ar, Kr, Xe, and N leading to Penning and associative ionization have been performed in a crossed molecular beam apparatus. A curved magnetic hexapole was used to state-select and polarize Ne( P ) atoms which were then oriented in a rotatable magnetic field and crossed with a beam of Ar, Kr, Xe, or N . The ratio of associative to Penning ionization was recorded as a function of the magnetic field direction for collision energies between 320 cm and 500 cm . Reactivities are obtained for individual states that differ only in Ω, the projection of the neon total angular momentum vector on the inter-particle axis. The results are rationalized on the basis of a model involving a long-range and a short-range reaction mechanism. Substantially lower probability for associative ionization was observed for N , suggesting that predissociation plays a critical role in the overall reaction pathway.
ISSN:1089-7690
DOI:10.1063/1.5026952