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Negative ion resonances in $CF_{4}$probed by dissociative electron attachment
| Content Provider | Scilit |
|---|---|
| Author | Coat, Y. Le Ziesel, J. Guillotin, J. |
| Copyright Year | 1994 |
| Description | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics An electrostatic impact spectrometer is used to measure, between 3 and 10 eV, the kinetic energy, the angular distributions and the yield of negative fragment ions formed by dissociative attachment in $CF_{4}$. The energy range and the symmetry of the resonances are determined as well as the dissociation processes and their dynamics. The first resonance state, observed around 6.8 eV, is attributed to the CF_{4}$^{-} $^{3}$T_{2}$ shape resonance adiabatically dissociating in the two channels F^{-}$+CF_{3}$ and CF_{3}$^{-}$+F. The excess energy is shared between the fragment kinetic energies and the internal (vibrational) excitation of the trifluoromethyl fragment. The next resonance, located around 8 eV, is assumed to be of $T_{1}$ symmetry. The authors suggest that this Feshbach resonance dissociates in $F^{-}$ ions by the sequential breaking of two C-F bonds through an intermediate CF_{3}$^{-}$* electronically excited negative molecular ion. The$ $^{2}$A_{1}$ shape resonance has not been observed in the dissociative channel. |
| Related Links | http://iopscience.iop.org/article/10.1088/0953-4075/27/5/016/pdf |
| Ending Page | 979 |
| Page Count | 15 |
| Starting Page | 965 |
| ISSN | 09534075 |
| e-ISSN | 13616455 |
| DOI | 10.1088/0953-4075/27/5/016 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Issue Number | 5 |
| Volume Number | 27 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1994-03-14 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Atomic, Molecular and Chemical Physics Kinetic Energy Feshbach Resonance State Observer |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics |
