Single shot experiments

In the vast majority of cases reported where a streak camera has been used to measure fluorescence lifetimes, the measurements have been made from a single laser shot. Since a high fluorescence efficiency is necessary for single shot experiments, most of these studies have been concerned with measuring the lifetimes and quenching of organic dye molecules in solution. For example, Yu etal. [67] have made a study of the fluorescence lifetime of malachite green as a function of solvent viscosity and the lifetime and relative yield of erythrosin as a function of water concentration in a water—acetone mixture. The fluorescence lifetimes of these dyes are... 

Adsorption Studies on Cobalt Molybdate Catalyst. Thiophene and C4 Hydrocarbons. The peak delay due to slow desorption of thiophene and its C4 product from the catalyst in single-shot experiments was investigated further, as it seemed probable that the desorption was slow enough to have a considerable effect on the over-all rate of reaction. The delay in appearance of the peak maximum... 

Even for single-shot experiments, photoexcitation has an advantage. If the starting materials absorb light strongly, experiments can often be performed with concentrations in the M region. Because the reactant excited... 

The recording of the rising part of the fluorescence transient (the decrease of photochemical quenching) requires a time resolution of the order of 100 ps per curve. A sequence this fast cannot be recorded in a single-shot experiment. Therefore, the recording of the sequence must be repeated and the data accumulated until enough photons have been collected. A suitable setup is shown in Fig. 5.33. 

Fig. 9.6 Laser ablation of polyimide (Kapton " ) at different wavelengths (given in the graph). The ablation rate obtained by single-shot experiments as a function of the...

During the last 15 years, several technical developments in the light source and detector made time-resolved Raman spectroscopy an important branch of time-resolved surface spectroscopy [60]. It should be emphasized that there are two kinds of time-resolved studies. The first kind of measurement is triggered by a certain surface process (reaction) named as a single shot experiment and the second one is a pump and probe technique. 

Laser-Pulse Energy Requirements for the Single Shot Experiment... 

Poly-rho tests, which are single shot experiments to determine detonation velocity as a function of density, were performed on 92a,b. When 92a is formulated with 5 weight percent of Kel-F 800 binder, a maximum pellet density of 1.79 g/cm was obtained. At this density, the detonation velocity measured was 8.07 km/s. The dinitrate derivative (92b) was formulated with 3 weight percent Estane binder and 3 weight percent nitro-plasticizer. At a maximum pellet density of 1.60 g/cm, a detonation velocity of 7.31 km/s was obtained. Salt 93b was found to be unstable based on DSC analysis, whereas salt 93a showed improved thermal stability but less than 93a [95]. The crystal density of 95 was reported to be 1.61 g/cm, and the heat of formation was 300 2kcal/mol [97]. The densities of 96a-c, 97 are reported to be in the range of 1.80 to 1.96 g/cm [96]. When these salts were heated... 

Even higher pulsed magnetic fields have been created in specialist central facilities (most notably in Tokyo) with fields reaching 200 T in single shot experiments. At 200 T these are literally single shot experiments, in the sense that the magnetic coil explodes, simultaneously destroying the sample ... 

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