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Luminescence measurements of hyperthermal Xe2+ + O2 and O+ + Xe collision systems

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Abstract

Emission excitation cross sections are recorded for collisions between Xe2+ + O2 and O+ + Xe over a collision energy range of approximately 2 to 900 eV in the center-of-mass (Ecm) frame. Emissive products of the O+ + Xe reaction are examined in the 700–1000 nm optical range and include neutral atomic oxygen emissions and neutral xenon emissions. Atomic emission products of the O+ + Xe collision appear to have measureable cross sections near Ecm = 14 eV and increase in intensity until about Ecm = 60 eV where they remain approximately constant for the remainder of the measured collision energies. For the Xe2+ + O2 collision system, O2+ charge transfer products are measured through fluorescence of the O2+(A–X) and (b–a) manifolds over the 200–850 nm window. Total cross sections for both manifolds do not vary beyond the experimental precision at all measured energies. Vibrational populations are derived from a fitting of the experimental data. The populations are found to deviate from a Franck–Condon distribution at all collision energies and appear to be well-modeled within a multi-channel Landau–Zener framework over the collision energy range measured.

Graphical abstract: Luminescence measurements of hyperthermal Xe2+ + O2 and O+ + Xe collision systems

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Supplementary files

Article information


Submitted
26 Sep 2019
Accepted
11 Mar 2020
First published
24 Mar 2020

Phys. Chem. Chem. Phys., 2020, Advance Article
Article type
Paper

Luminescence measurements of hyperthermal Xe2+ + O2 and O+ + Xe collision systems

M. L. Hause, S. Solter, B. D. Prince and R. J. Bemish, Phys. Chem. Chem. Phys., 2020, Advance Article , DOI: 10.1039/C9CP05314J

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