Spin-forbidden dissociation of ozone in the Huggins bands
Dissociation of ozone close to room temperature in the Huggins bands between 310 and 328 nm has been studied by time-of-flight spectroscopy of the resultant O(1D) and O2(a 1Δg) fragments. Clear evidence is seen for the spin-forbidden formation of both of these products in conjunction with the triple...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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1998
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| _version_ | 1826259855015411712 |
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| author | Denzer, W Hancock, G de Moira, J Tyley, P |
| author_facet | Denzer, W Hancock, G de Moira, J Tyley, P |
| author_sort | Denzer, W |
| collection | OXFORD |
| description | Dissociation of ozone close to room temperature in the Huggins bands between 310 and 328 nm has been studied by time-of-flight spectroscopy of the resultant O(1D) and O2(a 1Δg) fragments. Clear evidence is seen for the spin-forbidden formation of both of these products in conjunction with the triplet (ground) state co-fragment, as well as for the dissociation of internally excited ozone molecules to form both singlet products in a spin-allowed step. For O(1D) the ratio of spin-forbidden to spin-allowed formation increases as the wavelength is increased, and is more pronounced at the peaks in the structured Huggins bands. The spin-forbidden dynamics are consistent with initial absorption to a state of 1B2 symmetry, followed by curve crossing to triplet states which lead to fragmentation. The implications for the photochemistry of tropospheric ozone are briefly discussed. |
| first_indexed | 2024-03-06T18:56:23Z |
| format | Journal article |
| id | oxford-uuid:11fb8664-95b4-41b7-9be1-cde8fb536f83 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:56:23Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | oxford-uuid:11fb8664-95b4-41b7-9be1-cde8fb536f832022-03-26T10:05:17ZSpin-forbidden dissociation of ozone in the Huggins bandsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:11fb8664-95b4-41b7-9be1-cde8fb536f83EnglishSymplectic Elements at Oxford1998Denzer, WHancock, Gde Moira, JTyley, PDissociation of ozone close to room temperature in the Huggins bands between 310 and 328 nm has been studied by time-of-flight spectroscopy of the resultant O(1D) and O2(a 1Δg) fragments. Clear evidence is seen for the spin-forbidden formation of both of these products in conjunction with the triplet (ground) state co-fragment, as well as for the dissociation of internally excited ozone molecules to form both singlet products in a spin-allowed step. For O(1D) the ratio of spin-forbidden to spin-allowed formation increases as the wavelength is increased, and is more pronounced at the peaks in the structured Huggins bands. The spin-forbidden dynamics are consistent with initial absorption to a state of 1B2 symmetry, followed by curve crossing to triplet states which lead to fragmentation. The implications for the photochemistry of tropospheric ozone are briefly discussed. |
| spellingShingle | Denzer, W Hancock, G de Moira, J Tyley, P Spin-forbidden dissociation of ozone in the Huggins bands |
| title | Spin-forbidden dissociation of ozone in the Huggins bands |
| title_full | Spin-forbidden dissociation of ozone in the Huggins bands |
| title_fullStr | Spin-forbidden dissociation of ozone in the Huggins bands |
| title_full_unstemmed | Spin-forbidden dissociation of ozone in the Huggins bands |
| title_short | Spin-forbidden dissociation of ozone in the Huggins bands |
| title_sort | spin forbidden dissociation of ozone in the huggins bands |
| work_keys_str_mv | AT denzerw spinforbiddendissociationofozoneinthehugginsbands AT hancockg spinforbiddendissociationofozoneinthehugginsbands AT demoiraj spinforbiddendissociationofozoneinthehugginsbands AT tyleyp spinforbiddendissociationofozoneinthehugginsbands |