Magnetic moments of (νisub(13/2))sup(-n) isomers in neutron-deficient lead isotopes

The magnetic moments of the 12+ isomers in sup(192,196,198,200,206)Pb and of the 33+/2 isomer in 205Pb have been measured using the PAD technique. The results for the g-factors are: g(192)=-0.173(2), g(196)=-0.1600(15), g(198)=-0.1552(15), g(200)=-0.1512(15), g(206)=-0.1496(18), and g(205)=-0.148(5). As all states have a rather pure (νisub(13/2))sup(-n) configuration, the values reflect directly the νisub(13/2) orbital. They show a decrease towards the more neutron-deficient isotopes attributed to the reduced core polarisation as a result of decreasing occupation of the isub(13/2) neutron shell. The measured systematics are discussed regarding core polarisation, mesonic corrections, and small admixtures of core-excited states to the isub(13/2) wave function. (orig.)