24 research outputs found
Systematic acquisition of reading and writing. An Exploration of Structure in Didactic Elementary Texts for German
Get PDFProgression in Materials for Learning to Read and Write - a Cross-Language and Cross-Century Comparison of Readers
Get PDFDensity of Superfluid Helium Droplets
Full text linkThe classical integral cross sections of large superfluid 4He_N droplets and
the number of atoms in the droplets (N=10^3-10^4) have been measured in
molecular beam scattering experiments. These measurements are found to be in
good agreement with the cross sections predicted from density functional
calculations of the radial density distributions with a 10-90 % surface
thickness of 5.7\AA. By using a simple model for the density profile of the
droplets a thickness of about 6-8\AA is extracted directly from the data.Comment: 27 pages, REVTeX, 5 postscript figure
