Feb 12 – 14, 2007
CERN
Europe/Zurich timezone

Investigations on Isolated Eu Atoms in ZnO and on Pd Surfaces

Feb 13, 2007, 5:25 PM
20m
Council Chamber, 503/1-001 (CERN)

Council Chamber, 503/1-001

CERN

Speaker

Przemyslaw Imielski (Freie Universität Berlin)

Description

The valences of isolated Eu impurities at Pd surfaces and in ZnO semiconductor crystals are intended to be determined from the oscillation patterns of the perturbed angular correlation technique. After the production and the implantation of appropiate precursor isotopes, the 11/2-isomeric levels in Eu- 149 and Eu-147 have been utilized. After annealing procedures, first successful measurements could be done to determine the quadrupolar interactions of Eu in the top layer of a Pd single crystal and in non-cubic ZnO. Applying an external magnetic field in addition, the measured combined interactions are found to be in agreement with the assumption of bivalent Eu in ZnO.

Primary author

Przemyslaw Imielski (Freie Universität Berlin)

Co-authors

William Brewer (Freie Universität Berlin) Wolf-Dietrich Zeitz (Hahn-Meitner-Institut) Yuriy Manzhur (Hahn-Meitner-Institut)

Presentation materials