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Fine-structure branching ratios and Doppler profiles of Cl(2Pj) photofragments from photodissociation of the chlorine molecule near and in the ultraviolet region.
- Source :
-
Journal of Chemical Physics . 7/15/1992, Vol. 97 Issue 2, p1065. 7p. - Publication Year :
- 1992
-
Abstract
- Photofragment chlorine atoms in the 2Pj states from Cl2 at 266–500 nm are measured by a resonance-enhanced multiphoton ionization technique. The measured branching ratio of [Cl*(2P1/2)]/[Cl(2P3/2)] increases monotonically with dissociation wavelengths from (9.5±1.8)×10-3 at 308 nm to (4.7±0.5)×10-1 at 475 nm. At 375 nm≤λ≤475 nm, Doppler profiles of the chlorine atoms indicate adiabatic formation of two Cl(2P3/2) from the 1Π(1u) state of Cl2 and Cl(2P3/2)+Cl*(2P1/2) from the B 3Π(0+u) state. On the other hand, at a shorter wavelength (308 nm), Cl*(2P1/2) is generated from the 1Π(1u) state through nonadiabatic transitions during the dissociation. The relative contribution of the 1Π(1u)←X 1Σ(0+g) and B 3Π(0+u)←X 1Σ(0+g) transitions in the photoabsorption is estimated from the obtained branching ratios at 375 nm≤λ≤475 nm. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHOTODISSOCIATION
*CHLORINE
*IONIZATION (Atomic physics)
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 97
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 7639688
- Full Text :
- https://doi.org/10.1063/1.463285