We consider the polarization of unstable type-IIB D0-branes in the presence of a background five-form field strength. This phenomenon is studied from the point of view of the leading terms in the non-abelian Born Infeld action of the unstable D0-branes. The equations have SO(4) invariant solutions describing a non-commutative 3-sphere, which becomes a classical 3-sphere in the large-N limit. We discuss the interpretation of these solutions as spherical D3-branes. The tachyon plays a tantalizingly geometrical role in relating the fuzzy S 3 geometry to that of a fuzzy S 4 .
The close-coupling method is utilized to calculate partial cross sections for elastic and inelastic scattering o f He atoms with HX (X=F, Cl, Br) molecule based on the CCSD (T) potential energy surfaces obtained in the previous research. The calculation is performed at the incident energy of 200meV. The rationality of our results has been confirmed by comparison with the available theoretical results. The tendency of the elastic and inelastic rotational excitation partial wave cross sections varying with the reduced mass of the three systems is obtained.
Y2O2S:Eu phosphor films were prepared by reactive magnetron sputtering with a Y2O3:Eu target in a H2S and argon mixed atmosphere, and hot carrier injection (HCI)-type EL devices with Y2O2S:Eu/ZnS/Y2O2S:Eu structure were fabricated. It is found that the crystal structure of Y2O2S:Eu films depends on the sulfur concentration in the film. With increasing atomic ratios of S/Y, the crystal phase is changed from cubic to hexagonal. Luminescent spectra from the films are dependent on the crystal structures.
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