Cornelius Keller - Böcker

Astatine is - besides radon and francium - the only natural radioelement which only has short-Lived isotopes, thereby excluding experiments with . 38% a-branching of 227 Ac - a member of the 235U series - there is no chance to recover substantial amounts of 219At from natural sources for sCientific research of At.

The present volume describes the general properties of the thorium atom and ions, the thermodynamics of its compounds and solutions, the behavior of solutions and solid com­ pounds under the influence of its own radiation as well as an external radiation field, and spectroscopic data in great detail.

Verbindungen'" Teil B "Metall und Legierungen"' Teil D "Chemie in Lösung'" Die vorgezogene Herausgabe dieses Bandes wird durch die Tatsache gefördert, daß Th0 und 2 ThOrUOrMischoxide speziell für Hochtemperaturkernreaktoren als Brutstoffe für die Erzeugung 233 von U von Bedeutung sind.