First observation of a new partner band in mass 200 region near Z$=$82 shell closure as a signature of triaxiality.

The experimental observation of the wobbling motion as a signature of triaxial shapes in nuclei is of recent interest. The recent observation of wobbling in $^{183,187}$Au nuclei boosted up the search for such exotic shape in heavier mass region. The deformation driving effect of $\nu $i$_{13/2}$ causes axial and non-axial shapes in Hg nuclei around A $=$ 190. An experiment was performed at VECC, Kolkata, India, with 36-MeV $\alpha $ and using VENUS {\&} INGA Clover array which reports a new $\Delta $I $=$ 2, E2 band in $^{199}$Hg which decays to the yrast $\nu $i$_{13/2\, }$band via a set of $\Delta $I $=$ 1, E2-like transitions with large $\delta $ mixing, a signature of wobbling. A signature partner band was also found. This would be the first example of wobbling in this region and first such case with a neutron-hole configuration.