Abstract
The spectrum of the molecular eigenstates (ME) belonging to the various rotational members of the 1B3u (0–0) transition of pyrazine was measured with a very narrow band laser in a molecular beam with a Doppler width of 30 MHz.It is shown that, when the ME's belonging to a single rotational state are Fourier-transformed, the beating decays of these states are obtained. A problem is constituted by the lack of a fast component in these reconstructions, while it is observed in experiments on higher J-states.
Highlights
The theory of radiationless transitions from electronic states of molecules appears to be well understood
The state excited by light is coupled to such a dense manifold of vibronic states of a lower lying electronic state that one can apply Fermi’s Golden Rule and short exponential decay together with a low quantum yield is observed
This paper reports on a study of these effects for the radiationless transition of the 1Bau state of pyrazine
Summary
Deca the Reconstruction of of Rotational States of the u (0-0) Transition of Pyrazine. Laboratory for Physical Chemistry, University of Groningen, Nijenborgh 16, 9747 AG Groningen, The Netherlands. The spectrum of the molecular eigenstates (ME) belonging to the various rotational. 1B3u members of the (0-0) transition of pyrazine was measured with a very narrow band laser in a molecular beam with a Doppler width of 30 MHz. It is shown that, when the ME’s belonging to a single rotational state are Fouriertransformed, the beating decays of these states are obtained. A problem is constituted by the lack of a fast component in these reconstructions, while it is observed in experiments on higher J-states
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