Änderung des quadratischen Kernladungsradius bei Rotationsanregung

Abstract

Isomer shifts ofγ rays from rotational bands of deformed nuclei have been determined in Mössbauer effect measurements. The following changes of the mean square nuclear charge radii have been deduced:Δ〈r ²〉(¹⁵⁶Gd, 89keV)=(+2.6±0.8)·l0⁻³fm²,Δ〈r ²〉(¹⁷⁰Yb, 84keV)=(+1.2±0.3)·10⁻³fm²,Δ〈r ²〉(¹⁷¹Yb, 67keV)=(+1.1±0.2)·10⁻³fm².

The results are compared with theoretical calculations and additional experimental data, to study the effect of the Coriolis and centrifugal forces in rotational excitation on the motion of the nucleons.