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Ultrafast excited state dynamics of carotenoids in solution and bound to pigment-protein complexes have been investigated by means of femtosecond pump-probe spectroscopic measurements. Ultrafast triplet formation of carotenoids bound to pigmentprotein complexes was observed upon excitation of both carotenoids and bacteriochlorophyll. The anomalous reaction of triplet formation of carotenoids bound...
The purpose of our research work is to measure the space charge distribution in proton beam irradiated dielectric materials used for spacecraft. Spacecrafts sometimes have a serious damage due to the electro-static discharge accident. It is said that the charge accumulation in dielectric materials irradiated by high energy particles in space environment causes the discharge accident. Therefore, we...
Charge accumulation characteristics in dielectric materials for a spacecraft were studied to elucidate spacecraft charging problems in a high-energy radiation environment. This study especially addressed spacecraft charging accidents caused by internal charge accumulation in dielectric materials irradiated by electron and proton beams. Internal charge measurements of those bulk materials were carried...
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