ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Using the 93.3 keV resonance in67Zn the isomer shift, the quadrupole interaction, and the anisotropy of the Lamb-Mössbauer factor (LMF) in ZnF2 single crystals have been investigated. The main component of the electric field gradient (efg) tensorV zz=+(2.18+-0.22)×1017V/cm2 andη=0.29±0.03 are derived.V zz is oriented perpendicular to the crystallographicc axis. The anisotropy of the LMF is large:f x=(2.4±0.1)%,f y=(2.3±0.2)%, andf z=(1.4±0.2)%. Ab initio Hartree-Fock cluster calculations gave a detailed description of the observed charge distribution including the orientation of the efg tensor. Using a force constant model (shell model), we solved the eigenvalue problem of the dynamic matrix and quantitatively reproduced the anisotropy of the LMF.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02072892