Laser-induced-fluorescence studies of fragment ions: CH/sup +/ and CD/sup +/
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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6249587
- Report Number(s):
- LBL-13258; ON: DE82001010; TRN: 81-017557
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON COMPOUNDS
ION-MOLECULE COLLISIONS
DEUTERIDES
HYDRIDES
MOLECULAR IONS
FLUORESCENCE
DISSOCIATION
EXPERIMENTAL DATA
IONIZATION
LASER RADIATION
CHARGED PARTICLES
COLLISIONS
DATA
DEUTERIUM COMPOUNDS
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
INFORMATION
ION COLLISIONS
IONS
LUMINESCENCE
MOLECULE COLLISIONS
NUMERICAL DATA
RADIATIONS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena