The effect of intracluster photoelectron interactions on the angular distribution in I-center dot CH3I photodetachment

Journal article

Authors/Editors

Mbaiwa, Foster

Research Areas

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Publication Details

Author list: Van Duzor M, Wei J, Mbaiwa F, Mabbs R

Publisher: American Institute of Physics

Place: MELVILLE

Publication year: 2009

Journal: The Journal of Chemical Physics (0021-9606)

Journal acronym: J CHEM PHYS

Volume number: 131

Issue number: 20

Number of pages: 8

ISSN: 0021-9606

eISSN: 1089-7690

Languages: English-Great Britain (EN-GB)

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Abstract

I- and I-center dot CH3I velocity mapped photodetachment images are recorded over wavelengths between 270 and 370 nm. Spectral similarities, in conjunction with ab initio calculations show that the cluster anion comprises an atomic iodide anion moiety solvated by a relatively unperturbed CH3I molecule. Between 340-370 nm and at 280 nm, free I- is produced via a process analogous to dissociative electron attachment within the cluster anion. More strikingly, the photoelectron angular distribution for each species at a given electron kinetic energy is very different, despite detachment occurring from the iodide 5p orbital in each case. These observations reveal the effect of interaction of the photoelectron with the neutral cluster residue and are discussed in terms of resonances associated primarily with the CH3I molecule.

Keywords

Ab Initio calculations, electron detachment, molecular clusters, molecule-photon collisions, negative ions, organic compounds, photodissociation, photoelectron spectra

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