Origin of the line shapes from intramolecular Penning ionization in benzene/argon clusters

A supersonic beam of benzene (Bz) seeded in argon was ionized by VUV radiation from the Berlin electron storage ring (BESSY). Resonance structures in the photoionization efficiency curves of Bz and Bz⋅Arn (n=1,...,4) are attributed to intramolecular Penning ionization after excitation of argon withi...

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Bibliographic Details
Published in:The Journal of chemical physics 1987-03, Vol.86 (5), p.2525-2529
Main Authors: KAMKE, B, KAMBE, W, WANG, Z, RÜHL, E, BRUTSCHY, B
Format: Article
Language:English
Subjects:
Atomic and molecular clusters
Atomic and molecular physics
Exact sciences and technology
Physics
Studies of special atoms, molecules and their ions
clusters
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Summary:A supersonic beam of benzene (Bz) seeded in argon was ionized by VUV radiation from the Berlin electron storage ring (BESSY). Resonance structures in the photoionization efficiency curves of Bz and Bz⋅Arn (n=1,...,4) are attributed to intramolecular Penning ionization after excitation of argon within a mixed cluster. The dependence of the shapes of the resonance lines on the seed ratio and on the cluster size is reported. It is concluded that formation of large mixed clusters causes broad resonances which are blue shifted relative to the monomer absorption line, whereas the excitation of a single argon atom bound to benzene causes narrow and red shifted lines.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.452105