Stebbings, Ronald F.2018-12-182018-12-181974Cook, Thomas Bratton. "Penning ionization of atomic oxygen by helium (2¹S, 2³S) metastable atoms." (1974) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104173">https://hdl.handle.net/1911/104173</a>.https://hdl.handle.net/1911/104173Penning ionization of atomic oxygen is one of the important deexcitation processes for helium triplet metastable atoms in the atmosphere. Measurements of absolute Penning ionization cross sections for the reactions He(21S, 23S) + (3P) -> + + He + e are reported. Calculations of the atmospheric He(23S) concentration are discussed and the results of one such calculation, as recently reported in the literature, are presented.71 ppengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ThesisRICE1800reformatted digitalThesis Phys. 1974 Cook