Deformed intruder band in 113I.

High-spin states in the odd-$A{ }^{113}\mathrm{Sn}$ nucleus have been investigated with the ${}^{100}\mathrm{Mo}{(}^{18}\mathrm{O}, 5n)$ reaction at 94 MeV using the Chalk River $8\ensuremath{\pi}$ array. Three decoupled $(\ensuremath{\Delta}I=2)$ rotational bands extending to spins $I$ in the range $(63/2--69/2)\ensuremath{\Elzxh}$ have been identified and connected to known low-lying states. Experimental observations for the most extended band have been interpreted as evidence for smooth band termination. Theoretical calculations performed within a configuration-dependent shell-correction approach suggest that all three bands are built upon deformed two-particle--two-hole proton excitations across the $Z=50$ shell gap.