2013 Fiscal Year Final Research Report
Observation of dipole forbidden transitions of C2
| Project/Area Number |
24750010
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | C2ラジカル / c状態 / 摂動解析 / スピン－軌道相互作用 |
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| Research Abstract |
Higher vibrational levels of C2 were observed through visible band systems. Molecular constants of the c-state of C2 were precisely determined from room-temperature spectra of the d-c band system. We found that the c(v=1) state shows a level-crossing with the a(v=7) state. The perturbation analysis between the c(v=1) and a(v=7) states has been carried out. Accurate rovibronic level energies which have been determined from the experiment indicate that the singlet A(v=2) state is located very close to the triplet a(v=7) state, interacting with each other. However, the direction of the observed level shifts in the A(v=2) state cannot be explained with the literature value of the single-triplet energy gap, T0(a-X)=610.4 cm-1. It is concluded that the singlet-triplet energy gap should be modified by more than 3 cm-1 from the literature value.
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