Photodissociation of laboratory oriented molecules: Revealing molecular frame properties of nonaxial recoil
Journal Article
·
· Journal of Chemical Physics
- Laser Centre and Department of Chemistry, Vrije Universiteit, de Boelelaan 1083, 1081 HV Amsterdam (Netherlands)
We report the photodissociation of laboratory oriented OCS molecules. A molecular beam of OCS molecules is hexapole state-selected and spatially oriented in the electric field of a velocity map imaging lens. The oriented OCS molecules are dissociated at 230 nm with the linear polarization set at 45 deg. to the orientation direction of the OCS molecules. The CO({nu}=0,J) photofragments are quantum state-selectively ionized by the same 230 nm pulse and the angular distribution is measured using the velocity map imaging technique. The observed CO({nu}=0,J) images are strongly asymmetric and the degree of asymmetry varies with the CO rotational state J. From the observed asymmetry in the laboratory frame we can directly extract the molecular frame angles between the final photofragment recoil velocity and the permanent dipole moment and the transition dipole moment. The data for CO fragments with high rotational excitation reveal that the dissociation dynamics is highly nonaxial, even though conventional wisdom suggests that the nearly limiting {beta} parameter results from fast axial recoil dynamics. From our data we can extract the relative contribution of parallel and perpendicular transitions at 230 nm excitation.
- OSTI ID:
- 20658136
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 23 Vol. 121; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
State-to-state photodissociation of carbonyl sulfide ({nu}{sub 2}=0,1|JlM). II. The effect of initial bending on coherence of S({sup 1}D{sub 2}) polarization
Product angular distributions in the ultraviolet photodissociation of N{sub 2}O
Multiphoton ionization study of the photodissociation dynamics of the S/sub 2/ state of CH/sub 3/ONO
Journal Article
·
Sat Oct 22 00:00:00 EDT 2005
· Journal of Chemical Physics
·
OSTI ID:20723170
Product angular distributions in the ultraviolet photodissociation of N{sub 2}O
Journal Article
·
Fri Jan 27 23:00:00 EST 2012
· Journal of Chemical Physics
·
OSTI ID:22047164
Multiphoton ionization study of the photodissociation dynamics of the S/sub 2/ state of CH/sub 3/ONO
Journal Article
·
Sat Jan 14 23:00:00 EST 1989
· J. Chem. Phys.; (United States)
·
OSTI ID:6596712