1998 Fiscal Year Final Research Report Summary
Elucidation of Molecular Origin of Ozone Deficit
| Project/Area Number |
09044110
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Field |
Physical chemistry
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| Research Institution | Okazaki National Research Institutes |
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Principal Investigator |
SUZUKI Toshinori Okazaki National Research Institutes , Institute for Molecular Science , Associate Professor, 分子科学研究所, 助教授 (10192618)
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| Co-Investigator(Kenkyū-buntansha) |
TOUMI Ralf Imperial College London, Lecturer, 講師
HOUSTON Paul Cornell University, Professor, 教授
KOHGUCHI Hiroshi Okazaki National Research Institutes, Institute for Molecular Science, Research Associate, 分子科学研究所, 助手 (40311188)
VASYUTINSKII Oleg Ioffe Institute, 主任研究員
PAVLOV Lubomir Bulgarian Academy of Sciences, Institute of Electronics, Professor, 教授
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| Project Period (FY) |
1997 – 1998
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| Keywords | Ozone deficit / Oxygen / Vibrationally - excited molecules |
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| Research Abstract |
We have speculated that the ozone deficit is caused by ozone production via the reaction of vibrationally - excited oxygen molecule with surrounding oxygen molecule at the ground state . In order to examine this possibility , we mapped out the yield of highly vibrationally - excited oxygen molecules produced by photodissociation of Ozone in the Hartley band . The yield thus measured has been utilized in three dimensional atmospheric model calculation to demonstrate the possibility of this channel as the source of Ozone deficit . On the other hand , recent quantum chemical calculations show , although not yet concluded , that the rapid disappearance of vibrationally - excited oxygen molecule is not chemical reaction but to vibrational relaxation . This suggests that we need to look for other potential source of Ozone deficit more extensively . One possibility is that there exist unexplored feature in the reaction of O (1D) with hydrides in the stratosphere . In order to address this problem , we have constructed a new crossed molecular beam apparatus with high resolution imaging detector . The developed apparatus allows us to study the reaction of interest in much shorter time than before , acceleration investigation of reactions relevant to atmospheric problems .
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