High-Spin States in 93Nb

The high-spin states of 93 Nb are studied by the 82 Se( 16 O, p4n) 93 Nb reaction at a beam energy of 100 MeV. The in-beam γ-ray spectroscopic techniques are used. The γt-, γγt-coincidence, γ-ray angular distributions, and linear polarizations are measured. The configurations of the resultant levels are assigned by comparing them with those of the deformed independent particle model (DIPM) calculation. A high-spin isomer with a half life of 1.5(5) µs is found above the 37/2 (-) state at 7436 keV. A possible M1 rotational band is found to start from the 37/2 (-) state. This band shows the characteristics of an oblate collective rotational band.