Vibronic relaxation in parabenzoquinone: Its effect on the decay rate of rotary spin echoes |
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| Authors: | CA van &#x;t Hof J Schmidt |
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| Institution: | Center for the Study of the Excited States of Molecules, Huygens Laboratorium, University of Leyden, Leyden, The Netherlands |
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| Abstract: | We have observed that the decay rates of rotary spin echoes in the lowest triplet state T0 of parabenzoquinone (PBQ) and toluquinone (TQ) increase exponentially with the temperature. The activation energy in TQ is equal to the trap depth but in PBQ it corresponds with the energy differences between T0 and a higher lying vibronic level Te. From the experimental data we obtain the rates for excitation to and decay from this excited vibronic level in PBQ. |
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