| Project/Area Number |
02403006
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
構造化学
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| Research Institution | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
TSUCHIYA Soji The University of Tokyo,College of Arts and Sciences,Professor, 教養学部, 教授 (40012322)
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| Co-Investigator(Kenkyū-buntansha) |
YAMANOUCHI Kaoru The University of Tokyo,College of Arts and Sciences,Associate Professor, 教養学部・教助授, 助教授 (40182597)
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥25,000,000 (Direct Cost: ¥25,000,000)
Fiscal Year 1992: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1990: ¥15,000,000 (Direct Cost: ¥15,000,000)
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| Keywords | Molecular Vibration / Highly Excited Molecules / Normal Vibration / Local Vibration / Unimolecular Reaction / Chaos / Photodissociation |
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| Research Abstract |
Stimulated emission pumping(SEP),dispersed fluorescence(DF),and photofragment excitation(PHOFEX)spectroscopy have been applied to elucidate the vibrational dynamics of highly excited molecules. 1.Vibrational assignment was performed for more than 500 levels identified in the observed DF spectra up to 24,000 cm^<-1>. The bending vibration is very hamonic while two stretching modes couple with each other in the region above 20,000 cm^<-1>.2.Hierarchical structure is identified in the vibrational level structure of acetylene. A spectral peak called a feature state is formed by a Darling Dennision anharmonic resonance of two CH bending modes. In the higher energies,the feature is evolved to include couplings of other vibrational modes. 3.The photodissociation rate constant of the state-selected NO_2 is observed to show that the constant fluctuates around the value which is predicted by the phase-space theory. The fluctuation reflects quantum fluctuations associated with individual quasibound eigenstates. This conclusion is supported by the statistical analysis of the vironic levels of NO_2 just below the dissociation threshold.
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