## Rcceivcd 21 Jl?ly 1975 We present a theoretical model for describing spin coherence in photoexcited triplet states in zero-field under the influence of vibronic relaxation. From a comparison with experimental results in parabenzoquinone we obtain information about the properties of the excited
Vibronic relaxation in parabenzoquinone: Its effect on the decay rate of rotary spin echoes
✍ Scribed by C.A. van 't Hof; J. Schmidt
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 301 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
We have observed that the decay rates of rotary spin echoes in the lowest triplet state To of parabenzoquinone (PBQ) and toluquinonc (TQ) increase cxponentiaIly with the temperature. The activation erwigy in TQ is equal to the trap depth but in PBQ it corresponds with the energy differences between To and a hiher Lying vibratic Iewe1 T,. From the experimental data we obtain the rates for excitation to and decay fr0.m this escited vibronic lcvcl in PBQ.
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