Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 34: Poster II
A 34.30: Poster
Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster
Relativistic Contraction Studies at Heavy Elements — •Mustapha Laatiaoui1, Dieter Habs1, Michael Sewtz1, Hartmut Backe2, and Werner Lauth2 — 1LMU, Sektion Physik, Amcoulombwall 1, 85748 Garching — 2Uni Mainz, Institut für Kernphysik, 55099 Mainz
Some of the most fascinating studies of the actinides and the transactinides concern the influence of increasingly strong relativistic effects on the valence-electron configuration of the atoms and its consequences on their chemical behavior. Relativistic effects are caused, roughly speaking, by a contraction of the wavefunctions of s- and p1/2- electrons. Inner shell electrons influence indirectly via the shielding of the nuclear potential the valence electrons and, thus, the chemical properties as well. The quantum mechanical observables rmax and <r2> are both not only subjected to the above mentioned relativistic contraction but also reflect the electron configuration of the respective atoms and ions. Thus, systematic studies of rmax and <r2> of actinides and transactinides will contribute to a better understanding of the electronic structure in nuclear fields. These observables can be determined by ion-mobility spectrometry, which is a well established technique for investigations of the ion mobility of stable elements. An ion-mobility spectrometer being developed for high-precision studies of the ion-mobility of actinides and transactinides will be presented. This work is supported by the BMBF(06ML236I).