Date of Award

4-2009

Degree Name

Master of Arts

Department

Physics

First Advisor

John Tanis

Second Advisor

Emanuel Kamber

Third Advisor

Asghar Kayani

Access Setting

Masters Thesis-Campus Only

Abstract

Dissociative and non-dissociative ionization of diatomic oxygen in coincidence with projectile single-electron charge change and direct target ionization has been investigated for 1.0, 1.5, and 2.0 MeV/u O5+ + O2 collisions using time-of-flight mass spectrometry. Time-of-flight recoil-ion spectra and singles events associated projectile single-electron capture and loss were measured for O5+ + He and Ne, in addition to the of the system of interest, in order to assist in the identification of the oxygen recoil-on products and to ensure the validity of the data.

These He recoil-ion spectra and singles events associated with projectile singleelectron capture aided in determining the absolute cross sections for various processes. The total projectile single-electron capture and loss cross sections with absolute uncertainties were experimentally determined for O5+ + O2 collisions for each of the projectile energies. In addition, recoil-ion cross sections associated with projectile single-electron charge change and direct target ionization were also determined.

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