Prolate-oblate band mixing and new bands inHg182

In-beam γ-ray spectroscopic studies of ${}_{}{}^{182}{}_{}{}^{}\mathrm{Hg}$ have revealed five new bands. The $2^{+}$ state of the prolate band has been identified at an energy of 548.6 keV and is higher than in ${}_{}{}^{184}{}_{}{}^{}\mathrm{Hg}$. A two parameter band mixing calculation results in an interaction energy of 83 keV between the prolate $2^{+}$ and the oblate $2^{+}$ states. Several additional new bands are seen including some which are interpreted as quadrupole vibrational bands built on the excited prolate minimum.