1,492 research outputs found
Line identification and lifetime measurements in the XUV and soft X-ray regions
A summary of the data acquired concerning line identification and lifetime measurements in the xuv and soft X-ray regions for a variety of both resonance transitions and forbidden transitions in ions of astrophysical interest is provided. Particular attention is called to a few papers which appeared in the Astrophysical Journal. These are of special relevance to specific astrophysical data needs. The many experiments completed in areas related to but somewhat outside the confines of the project title are mentioned
Skyrmions induced by dissipationless drag in U(1)xU(1) superconductors
Rather generically, multicomponent superconductors and superfluids have
intercomponent current-current interaction. We show that in superconductors
with substantially strong intercomponent drag interaction, the topological
defects which form in external field are characterized by a skyrmionic
topological charge. We then demonstrate that they can be distinguished from
ordinary vortex matter by a very characteristic magnetization process due to
the dipolar nature of inter-skyrmion forces. The results provide an
experimental signature to confirm or rule out the formation -wave state with
reduced spin stiffness in -wave superconductors.Comment: Replaced with a version in print in Physical Review B; Improved and
extended as compared to the first version; 13 pages; 12 figure
Arguments en faveur d'une modification du génome (introgression) du parasite humain Schistosoma haematobium par des gènes de S. bovis, au Niger
La caractérisation de schistosomes par la morphologie des oeufs intra-utérins des vers femelles et l'analyse des phénotypes des parasites observés pour la phosphatase acide après séparation électrophorétique suggère la présence de gènes de #S. bovis, parasite du bétail domestique, chez les schistosomoses issus de l'homme dans la région est du Niger et présumés appartenir à #S. haematobium. Cette introgression naturelle pourrait également implique #S. curassoni$, un autre schistosome du bétail sympatrique des 2 autres espèces dans cette région. (Résumé d'auteur
Effect of dislocations on charge carrier mobility-lifetime product in synthetic single crystal diamond
The authors report correlations between variations in charge transport of electrons and holes in synthetic single crystal diamond and the presence of nitrogen impurities and dislocations. The spatial distribution of these defects was imaged using their characteristic luminescence emission and compared with maps of carrier drift length measured by ion beam induced charge imaging. The images indicate a reduction of electron and hole mobility-lifetime product due to nitrogen impurities and dislocations. Very good charge transport is achieved in selected regions where the dislocation density is minimal
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