| Autor: |
Howe, J. D., Ashfold, M. N. R., Western, C. M., Hudgens, J. W. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 2/22/1996, Vol. 104 Issue 8, p2789, 12p |
| Abstrakt: |
PF radicals in both their ground (X 3Σ-) and metastable (a 1Δ) electronic states have been produced by the gas phase reaction of F atoms with phosphine in a discharge flow reactor and detected by mass selective resonance enhanced multiphoton ionization (REMPI) spectroscopy in the wavelength range 410–225 nm. Analysis of the longer wavelength end of this spectrum (λ>=328 nm) has enabled identification and spectroscopic characterization of five hitherto unknown Rydberg states of this radical. These we label the h 1Σ+ (T0=57 324.9 cm-1), D 3Δ (T0=58 223.0 cm-1), E 3Σ- (T0=58 690 cm-1), i 1Δ (T0=59 881.6 cm-1), and j 1Σ- (T0=61 873.9 cm-1) states, respectively. [Origins, relative to the lowest rovibrational level of the ground (X 3Σ-) state are indicated by the numbers in brackets.] Quantum defect arguments suggest that all five states derive from the electronic configuration [2Π]4pπ1. Within the shorter wavelength region we identify two additional sets of poorly resolved resonances which we associate with a further two Rydberg states belonging to series converging to the ground state ionization limit, followed by two extensive progressions of bands. Possible assignments for these two progressions are considered. © 1996 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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