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Abstract

The actinides form a particular series of elements and compounds displaying properties ranging from those of the transition elements to those of the lanthanides. The interaction of the 5f electrons with the 6d and 7s electrons confer unusual and surprising behaviour, the full interpretation of which requires new theoretical models. This explains the increasing interest shown by solid state scientists during the last few years to the actinide series. Progress in actinide solid state physics depends on the availability of adequate samples with well defined structure, well known purity, and appropriate dimensions. A purity level of 99.9 % is acceptable for many physical property determinations. Nevertheless, some properties are sensitive to impurities down to the 10 at ppm range. The five nine level (99.999 %) can be considered as ideal purity, since a further diminution of the impurity concentration does not produce any measurable change of the physical properties. The measurement of properties showing anisotropy necessitates well characterized single crystals of suitable size. The size required ranges from some % of 1 mm**3 for structure determination by X-ray diffraction to a fraction of 1 cm**3 for neutron scattering or angular resolved photoemission. In this chapter the latest developments in the preparation of actinide samples for solid state physics investigations are reported.

Additional information

Authors: SPIRLET J C JRC KARLSRUHE ESTAB. (GERMANY) VOGT O LABORATORIUM FUER FESTKOERPERPHYSIK, EIDGEN. TECHNISCHE HOCHSCHULE, ZUERICH (SCHWEIZ) , JRC KARLSRUHE ESTAB. (GERMANY);LABORATORIUM FUER FESTKOERPERPHYSIK, EIDGEN. TECHNISCHE HOCHSCHULE, ZUERICH (SCHWEIZ)
Bibliographic Reference: HANDBOOK ON THE PHYSICS AND CHEMISTRY OF THE ACTINIDES, PUBLISHED BY ELSEVIER SCIENCE PUBLISHERS, B.V., AMSTERDAM (THE NETHERLANDS) 1984, PP. 79-151
Record Number: 1989123034300 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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