Isotopieverschiebung im Zirkon I-Spektrum

Abstract

Using highly enriched samples of the zirconium isotopes 90, 92, 94, and 96 the isotope shift in the Zr-I spectrum has been measured with the aid of a photoelectrically recording Fabry-Perot spectrometer. Both mass-dependent and nuclear-volume effects were found to contribute to the observed shifts. The nuclear-volume dependent part of the measured shifts has been determined; the relative position of the isotopes caused by this part isΔ ν _V (90−92):Δ ν _V (92−94):Δ ν _V (94−96)=1:(0.70±0.08):(0.54±0.06). The experimental isotope-shift constantsβC _exp are (90–92)∶44·1±5·1; (92–94)∶30·9±5·4; (94–96)∶23·8±5·0 mK.