Laser-induced-fluorescence studies of fragment ions: CH/sup +/ and CD/sup +/

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The dynamics of ion-molecule interactions within a mass selective rf quadrupole ion trap are studied for several ion-molecule systems. Laser induced fluorescence is used as a probe of the internal energy distributions of molecular ions under collision free conditions and under controlled collision conditions. The effects of collisions at near thermal energies (0.3 to 0.5 eV) are easily understood in terms of processes such as charge transfer and other energy transfer mechanisms. The A/sup 1/PI - X/sup 1/..sigma../sup +/ system of CH/sup +/ and CD/sup +/ has been examined under collision free conditions. The ions were produced from methane through ... continued below

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Pages: 114

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O'Keefe, A. August 1, 1981.

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Description

The dynamics of ion-molecule interactions within a mass selective rf quadrupole ion trap are studied for several ion-molecule systems. Laser induced fluorescence is used as a probe of the internal energy distributions of molecular ions under collision free conditions and under controlled collision conditions. The effects of collisions at near thermal energies (0.3 to 0.5 eV) are easily understood in terms of processes such as charge transfer and other energy transfer mechanisms. The A/sup 1/PI - X/sup 1/..sigma../sup +/ system of CH/sup +/ and CD/sup +/ has been examined under collision free conditions. The ions were produced from methane through electron impact ionization/dissociation. The observed energy distributions reflect the dynamical partitioning of dissociation exothermicity, excepting short lived electronic states. Many new transitions belonging to this electronic system have been observed and a reliable vibrational frequency for the X/sup 1/..sigma../sup +/ state has been obtained. The radiative lifetimes of CH/sup +/ and CD/sup +/ A/sup 1/PI(v = 0) states have been measured and a revised oscillator strength for the A-X transition has been derived from this data.

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Pages: 114

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NTIS, PC A06/MF A01.

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  • Other Information: Thesis

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  • Other: DE82001010
  • Report No.: LBL-13258
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/6249587 | External Link
  • Office of Scientific & Technical Information Report Number: 6249587
  • Archival Resource Key: ark:/67531/metadc1114351

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  • August 1, 1981

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • April 25, 2018, 4:13 p.m.

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O'Keefe, A. Laser-induced-fluorescence studies of fragment ions: CH/sup +/ and CD/sup +/, report, August 1, 1981; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1114351/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.