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|Title:||Time frame viewpoint of resonance Raman enhancement of a non-totally symmetric vibration|
|Source:||Lee, S.-Y. (1990). Time frame viewpoint of resonance Raman enhancement of a non-totally symmetric vibration. The Journal of Chemical Physics 92 (11) : 6376-6383. ScholarBank@NUS Repository.|
|Abstract:||The time frame approach is presented to describe the resonance Raman enhancement of a non-totally symmetric vibration due to vibronic coupling between two nearby electronic states. It is shown that in contrast to the resonance Raman enhancement of a totally symmetric vibration, the resonant contribution to the Raman scattering tensor for a non-totally symmetric vibration arises from the electronic state that is vibronically coupled to the electronic state first reached by the incident light. The second-order differencing method of Kosloff is used to numerically solve the coupled time-dependent Schrödinger equation in an application to pyrazine. In the case where the vibronically coupled states have the same oscillator frequency, it is shown that a unitary transformation of the wave packets leads to an immediate picture of the adiabatic states, as well as provide a qualitative explanation of various factors on the Raman intensity. © 1990 American Institute of Physics.|
|Source Title:||The Journal of Chemical Physics|
|Appears in Collections:||Staff Publications|
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