SEARCH · Search NASA
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
The 2000 Nuclear Data Sheets for A = 121 by T. Tamura, with literature cutoff date of July 1,1999 has been updated. The experimental results from various decays and reactions for A=121 mass chain have been compiled and evaluated. The nuclides covered in this evaluation are from {sup 121}Rh to {sup 121}Pr. The data are summarized and presented, together with adopted level schemes.
A mild hydrothermal process to prepare Ba{sub 2}SbLnO{sub 6} (Ln = Pr, Nd, Sm, Eu) perovskite-type oxides are presented. These perovskites were characterized on the basis of X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), inductively-coupled plasma spectra (ICP) techniques. Primary structure was confirmed using Rietveld method based on XRD data shows that the likely space groups of Ba{sub 2}SbLnO{sub 6} are R-3 for Ln = Pr and Nd and F{sub m}-3{sub m} for Ln = Sm and Eu, respectively. The measurement of Moessbauer effect of the 37.2 keV {gamma} transition of {sup 121}Sb indicates that the isomer shift of these perovskites falls in the region of the Sb{sup 5+} and reflects some hybridized-orbital behavior in Sb-O bonds.