Measurement of kinetic processes in photoexcited stilbene solutions |
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| Authors: | E Heumann W Triebel R Uhlmann B Wilhelmi |
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| Institution: | Physical Department, Friedrich-Schiller-University Jena, Jena, German Democratic Republic |
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| Abstract: | The kinetics of photophysical processes has been measured in stilbene solutions in the temperature range between ?40°C and 20°C. The population of the S1 level excited by two-photon absorption (TPA) and of secondary populated levels has been investigated using a probe beam method. It was found an energy barrier ΔE = 5 × 102 cm?1 of the thermically activated transition S1 → 1′. The rate parameter of this transition is determined to be k?111′, ≈ 2 ps at very high temperatures. |
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