Velocity-map imaging study of the photodissociation of acetaldehyde
Velocity-map imaging studies are reported for the photodissociation of acetaldehyde over a range of photolysis wavelengths s317.5–282.5 nmd. Images are obtained for both the HCO and CH3 fragments. The mean rotational energy of both fragments increases with photodissociation energy, with a lesser deg...
| Hauptverfasser: | , |
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| Format: | Journal article |
| Sprache: | English |
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American Institute of Physics
2005
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| _version_ | 1826276553623863296 |
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| author | H A Cruse T P Softley |
| author_facet | H A Cruse T P Softley |
| author_sort | H A Cruse |
| collection | OXFORD |
| description | Velocity-map imaging studies are reported for the photodissociation of acetaldehyde over a range of photolysis wavelengths s317.5–282.5 nmd. Images are obtained for both the HCO and CH3 fragments. The mean rotational energy of both fragments increases with photodissociation energy, with a lesser degree of excitation in the CH3 fragment. The CH3 images demonstrate that the CH3 fragments are rotationally aligned with respect to the recoil direction and this is interpreted, and well modeled, on the basis of a propensity for forming CH3 fragments with M,K, where M is the projection of the rotational angular momentum along the recoil direction. The origin of the CH3 rotation is conserved motion from the torsional and methyl-rocking modes of the parent molecule. Nonstatistical vibrational distributions for the CH3 fragment are obtained at higher energies. |
| first_indexed | 2024-03-06T23:15:42Z |
| format | Journal article |
| id | oxford-uuid:670c66db-d2b6-4896-b7ad-a5da87199e06 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:15:42Z |
| publishDate | 2005 |
| publisher | American Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:670c66db-d2b6-4896-b7ad-a5da87199e062022-03-26T18:35:51ZVelocity-map imaging study of the photodissociation of acetaldehydeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:670c66db-d2b6-4896-b7ad-a5da87199e06Photochemistry and reaction dynamicsEnglishOxford University Research Archive - ValetAmerican Institute of Physics2005H A CruseT P SoftleyVelocity-map imaging studies are reported for the photodissociation of acetaldehyde over a range of photolysis wavelengths s317.5–282.5 nmd. Images are obtained for both the HCO and CH3 fragments. The mean rotational energy of both fragments increases with photodissociation energy, with a lesser degree of excitation in the CH3 fragment. The CH3 images demonstrate that the CH3 fragments are rotationally aligned with respect to the recoil direction and this is interpreted, and well modeled, on the basis of a propensity for forming CH3 fragments with M,K, where M is the projection of the rotational angular momentum along the recoil direction. The origin of the CH3 rotation is conserved motion from the torsional and methyl-rocking modes of the parent molecule. Nonstatistical vibrational distributions for the CH3 fragment are obtained at higher energies. |
| spellingShingle | Photochemistry and reaction dynamics H A Cruse T P Softley Velocity-map imaging study of the photodissociation of acetaldehyde |
| title | Velocity-map imaging study of the photodissociation of acetaldehyde |
| title_full | Velocity-map imaging study of the photodissociation of acetaldehyde |
| title_fullStr | Velocity-map imaging study of the photodissociation of acetaldehyde |
| title_full_unstemmed | Velocity-map imaging study of the photodissociation of acetaldehyde |
| title_short | Velocity-map imaging study of the photodissociation of acetaldehyde |
| title_sort | velocity map imaging study of the photodissociation of acetaldehyde |
| topic | Photochemistry and reaction dynamics |
| work_keys_str_mv | AT hacruse velocitymapimagingstudyofthephotodissociationofacetaldehyde AT tpsoftley velocitymapimagingstudyofthephotodissociationofacetaldehyde |