Article
Scattering angular distributions in collisionally activated dissociation of some high mass ions: Analysis of mass‐analyzed ion kinetic energy peak shapes
Journal of Chemical Physics
(1995)
Abstract
A method has been developed to determine scattering angular distribution in collisionally activated
dissociation ~CAD! of high mass ions by analyzing translational energy spectra recorded by
mass-analyzed ion kinetic energy spectrometry. Scattering angular distributions have been obtained
for CAD of C6F5I1˙, Cr~CH3COCHCOCH3!3
1˙ , and Cs5I4
1 with He. Large energy losses observed in
the translational energy spectra are attributed to the elastic energy transfer to the collision gas
accompanying collisional deflection. Deflections of the parent ions get larger as the translational
energy for relative motion in the center-of-mass coordinate system decreases. This has been
explained by the reactive line-of-centers model. Either vibrational excitation via momentum transfer
or vibronic excitation via nonadiabatic interaction is compatible with the experimental data. On the
other hand, electronic excitation via the Franck–Condon process is not a feasible mechanism to
explain the excitation process in CAD of high mass ions at keV translational energy.
Disciplines
Publication Date
October, 1995
DOI
10.1063/1.470580
Publisher Statement
Copyright 1995 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Citation Information
Young Jin Lee and Myung Soo Kim. "Scattering angular distributions in collisionally activated dissociation of some high mass ions: Analysis of mass‐analyzed ion kinetic energy peak shapes" Journal of Chemical Physics Vol. 103 Iss. 13 (1995) p. 5442 - 5450 Available at: http://works.bepress.com/youngjin-lee/11/