Zobrazeno 1 - 10
of 664
pro vyhledávání: '"A. Oulianov"'
Autor:
Oulianov, Dmitri A., Li, Yuelin, Crowell, Robert A., Shkrob, Ilya A., Gosztola, David J., Korovyanko, Oleg J., Rey-de-Castro, Roberto C.
A terawatt tabletop laser wakefield acceleration source of relativistic electrons has been developed in our Terawatt Ultrafast High Field Facility (TUHFF). The preliminary results for ultrafast radiolysis of liquid water using this femtosecond electr
Externí odkaz:
http://arxiv.org/abs/physics/0608107
Autor:
Oulianov, Dmitri A., Crowell, Robert A., Gosztola, David J., Shkrob, Ilya A., Korovyanko, Oleg J., Rey-de-Castro, Roberto C.
We report the first ultrafast pulse radiolysis transient absorption spectroscopy measurements from the Terawatt Ultrafast High Field Facility (TUHFF) at Argonne National Laboratory. TUHFF houses a 20 TW Ti:sapphire laser system that generates 2.5 nC
Externí odkaz:
http://arxiv.org/abs/physics/0608106
Autor:
Lian, Rui, Oulianov, Dmitri A., Crowell, Robert A., Shkrob, Ilya A., Chen, ; Xiyi, Bradforth, Stephen E.
Photostimulated electron detachment from aqueous inorganic anions is the simplest example of solvent-mediated electron transfer. Here we contrast the behavior of halide anions with that of small polyatomic anions, such as pseudohalide anions (e.g., H
Externí odkaz:
http://arxiv.org/abs/physics/0501112
Publikováno v:
Chem. Phys. Lett. 383 (2004) 481
The picosecond dynamics of hydroxyl radicals generated in 200 nm photoinduced dissociation of aqueous hydrogen peroxide have been observed through their transient absorbance at 266 nm. It is shown that these kinetics are nearly exponential, with a de
Externí odkaz:
http://arxiv.org/abs/physics/0501098
The picosecond geminate recombination kinetics for hydrated electrons generated by 200 nm two photon absorption (12.4 eV total energy) has been measured in both light and heavy water. The geminate kinetics are observed to be almost identical in both
Externí odkaz:
http://arxiv.org/abs/physics/0407148
Single-shot ultrafast spectroscopy based on the frequency encoding of transient absorbance kinetics (FDSS) is demonstrated. These kinetics are sampled spectrally using linearly chirped pulses derived from a Ti:sapphire laser. A variable length gratin
Externí odkaz:
http://arxiv.org/abs/physics/0407017
Autor:
Crowell, Robert A., Lian, Rui, Shkrob, Ilya A., Qian, Jun, Oulianov, Dmitri A., Pommeret, Stanislas
Picosecond geminate recombination kinetics for electrons generated by multiphoton ionization of liquid water become power dependent when the radiance of the excitation light is greater than 0.3-0.5 TW/cm^2 (the terawatt regime). To elucidate the mech
Externí odkaz:
http://arxiv.org/abs/physics/0405013
Autor:
Lian, Rui, Crowell, Robert A., Shkrob, Ilya A., Bartels, David M., Oulianov, Dmitri A., Gosztola, David
Picosecond dynamics of hydrated electrons and hydroxyl radicals generated in 200 nm photodissociation of aqueous hydroxide and 400 nm (3-photon) ionization of water in concentrated alkaline solutions were obtained. No deprotonation of hydroxyl radica
Externí odkaz:
http://arxiv.org/abs/physics/0401057
Single-shot ultrafast absorbance spectroscopy based on the frequency encoding of the kinetics is analyzed theoretically and implemented experimentally. The kinetics are sampled in the frequency domain using linearly chirped, amplified 33 fs FWHM puls
Externí odkaz:
http://arxiv.org/abs/physics/0401039
Single-shot ultrafast absorbance spectroscopy based on the frequency encoding of the kinetics is analyzed theoretically and implemented experimentally. In Part II of the series, arbitrary thickness sample is analysed theroretically. The model is then
Externí odkaz:
http://arxiv.org/abs/physics/0401040