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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Ionization and fragmentation of molecular gases in collisions with MeV/amu heavy ions
  name:
    name part: Maurer, Richard Jay
    name part: 1958-
    role:
      role term: creator
  name:
    name part: Church, David A.
    role:
      role term: degree committee member.
  name:
    name part: Schmitt, Richard P.
    role:
      role term: degree committee member.
  name:
    name part: Schweikert, Emile A.
    role:
      role term: degree committee member.
  name:
    name part: Watson, Rand L.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1988
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xvii, 218 leaves : illustrations ; 29 cm
  abstract: A detailed study of ionization and fragmentation in molecular gas targets by 2.75 MeV H[+] and 40 MeV Ar[13+] ions has been performed using the time-of-flight (TOF) method. Ionization of molecular gases by 2.75 MeV H[+] ions results primarily in single and double ionization, and consequently, the fragmentation patterns are simple to interpret. Energetic highly-charged, heavy ions, such as 40 MeV Ar[13+], were found to be very effective in producing multiple ionization in molecular gas targets either through direct ionization or electron capture. Multiply-charged molecular ions, which are typically very unstable, rapidly dissociate to yield a rich fragmentation pattern containing numerous atomic and molecular fragments. A two stage TOF mass spectrometer was designed, constructed and tested for application to the study of fragmentation in molecular gas targets. The TOF spectrometer was calibrated and optimized for resolution and space focussing using neon and argon gas targets. To verify the proper working conditions for the spectrometer, several experiments were performed using noble gas targets including coincidence measurements of the recoil ion charge state distributions with the post-collision charge states of a 40 MeV Ar[13+] beam. Partial cross sections for direct ionization, one-, two- and three-electron capture in neon and argon by 40 MeV Ar[13+] ions have been determined and compared to ion-atom collisions theories. The fragmentation patterns for several molecular gases from simple diatomics (N2, O2, CO, NO) and triatomics (CO2, C2O, CO2, SO2) to large polyatomics (C2F6, C2H4F2, SF6) have been measured. The fragmentation patterns for molecular gases measured by the TOF method were found to be useful in providing information about the various pathways for unimolecular dissociation of multiply-charged molecular ions. Moreover, several useful quantities such as fragments yields and average kinetic energies were obtained from the TOF spectrum. Energetic fragment…
  note: "Major subject: Chemistry."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1988
  note: Includes bibliographical references (leaves 201-204).
  subject:
    topic: Heavy ion collisions
  subject:
    topic: Ionization of gases
  subject:
    topic: Time-of-flight mass spectrometry
  subject:
    topic: Major chemistry
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-779259
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-779259
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 890602
    record change date: 20220104090403.0
    record identifier: in00000768226
    language of cataloging:
      language term: eng