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11.
Schürmann D. Schlagheck W. Heckmann P. H. Bukow H. H. Buttlar H. v. 《Zeitschrift für Physik A Hadrons and Nuclei》1971,246(3):239-247
H +2 ions or protons, accelerated to energies between 80 and 300 keV, are sent through a thin carbon target. Light emitted by the excited atoms moving out of the foil with a definite velocity is analyzed using interference filters and a cooled photomultiplier. Intensities of theH α,H β, andH γ lines are measured as functions of the distance from the foil. The data is analyzed with a computer program, which yields (in agreement with theory) mean lives of the hydrogen atom excited states involved, and the relative initial state populations of states belonging to the same principal quantum number. There is no indication of cascading.
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The mass transport for a liquid/liquid extraction system is examined using a numerical concept following the idea of the interface-tracking method. Separate, body-fitted, static computational domains are arranged around an imported steady-state interface topology. The domains are coupled at the free interface to capture the behaviour of the conjugated system. The steady-state hydrodynamics are the basis for the simulation of the transient mass transport, which is calculated as a passive scalar concentration or one-way coupling. The investigation is restricted to the extraction from the disperse to the continuous phase. Simulation results for an extraction from the disperse to the continuous phase show that most of the mass is transferred through the wall-film region into the continuous phase. (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Ohne ZusammenfassungMit 2 Abbildungen 相似文献
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P.H. Heckmann E. Träbert H. Winter F. Hannebauer H.H. Bukow H.v. Buttlar 《Physics letters. A》1976,57(2):126-128
Radiative lifetimes of oxygen ions accelerated to 15 MeV and excited by a thin carbon foil have been measured using a grazing-incidence spectrometer. Where theoretical values are available, the measured lifetimes agree well with theory. 相似文献
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J. Barrau M. Heckmann J. Collet M. Brousseau 《Journal of Physics and Chemistry of Solids》1973,34(9):1567-1577
A free electron and a free hole in a crystal may be bound together due to the attractive coulomb field: in semiconductors such an electron-hole pair is similar to the Wannier-Mott exciton. The probability of binding into the fundamental state has been calculated by Lipnik[1]. Lipnik's model does not predict our recent low temperature measurements[2]. Actually the binding probabilities of excited states of excitons must be considered. This is the purpose of the present paper: a quantum model, (adequate in the low temperature limit) and a semi-classical model (adequate when the temperature rises) are presented. 相似文献