nucleus, 180W. Its structure corresponds to a t-band in the tilted-cranking representation. It
crosses the ground-state band at I= 16 h ̵, giving rise to backbending in the yrast
sequence. Contrary to the usual interpretation, backbending in this case is not caused by the
s-band. Comparison is made with other possible t-band crossings in the A≈ 180 region.