Triaxial Superdeformation in 163 Lu

Abstract High-spin states in 163 Lu have been investigated using the Euroball spectrometer array. The previously known superdeformed band has been extended at low and high energies, and its connection to the normal-deformed states has been established. From its decay the mixing amplitude and interaction strength between superdeformed and normal states are derived. In addition, a new band with a similar dynamic moment of inertia has been found. The experimental results are compared to cranking calculations which suggest that the superdeformed bands in this mass region correspond to shapes with a pronounced triaxiality ( γ ≈±20°)

Conversion--electron gamma--ray coincidence spectroscopy of superdeformed 135Nd^{135} Nd

Three mini-orange conversion–electron spectrometers and four Euroball Ge Cluster detectors have been used for $\gamma$–e$^{-}$ coincidence spectroscopy of superdeformed $^{135}$Nd. Transitions within the superdeformed band are shown to have the expected E2 multipolarity. The 766.5–keV transition which links the band to a positive-parity state has a conversion coefficient consistent with M1 multipolarity. Consequently, positive parity is deduced for the superdeformed band. No evidence for E0 transitions was found

Conversion electron spectroscopy of magnetic-rotational bands in 197^{197}Pb and 199^{199}Pb

Magnetic–rotational bands in the nearly spherical nuclei $^{197}$Pb and $^{199}$Pb and their decay to the normal states have been investigated by in–beam conversion electron spectroscopy following (heavy ion,xn) reactions. The expected M1 multipolarity of the in–band transitions has been confirmed for the strongest bands and the multipolarity of several transitions in the decay of the bands has been determined