The effect of intracluster photoelectron interactions on the angular distribution in I- CH3 i photodetachment

Journal article

Authors / Editors

Mbaiwa, Foster

Research Areas

ENGINEERING AND TECHNOLOGY (Frascati classification)

Publication Details

Subtitle: The effect of intracluster photoelectron interactions on the angular distribution in I- CH3 i photodetachment

Author list: Mbaiwa, Foster

Publisher: AIP Publishing

Publication year: 2009

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

Volume number: 131

Issue number: 20

ISSN: 0021-9606

eISSN: 1089-7690

URL: https://aip.scitation.org/doi/abs/10.1063/1.3266936

Languages: English-United States (EN-US)

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Abstract

I- and I- CH3 I 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 CH3 I 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 CH3 I molecule.I- and I- CH3 I 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 CH3 I 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 CH3 I molecule.

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