An experimental study of HF photodissociation: Spin{endash}orbit branching ratio and infrared alignment
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482 (United States)
Single rotational levels of HF ({ital v}=3) were prepared by using overtone excitation and these molecules were then photodissociated by ultraviolet (UV) radiation at 193.3 nm. Time-of-flight spectra of the hydrogen atom fragment provided the spin{endash}orbit state distribution of the fluorine fragment. Changing the UV photolysis laser polarization confirmed an {ital A}{sup 1}{Pi}{l_arrow}{ital X}{sup 1}{Sigma}{sup +} electronic transition in the photodissociation step. Photodissociation of HF at 121.6 nm is also reported. Infrared (IR) induced alignment of the diatom was studied by monitoring the IR laser polarization dependence of the H-atom product angular distribution. Depolarization due to hyperfine interaction was studied by using the {ital R}(0) transition. Agreement with theory is excellent. {copyright} {ital 1996 American Institute of Physics.}
- DOE Contract Number:
- FG03-85ER13363
- OSTI ID:
- 280117
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 18 Vol. 104; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Propensities toward C{sub 2}H({ital {tilde A}} {sup 2}{Pi}) in acetylene photodissociation
Rotational alignment of the CD sub 3 fragment from the 266-nm photodissociation of CD sub 3 I