  A beam containing a substantial component of both the $J^{\pi}=5^+$,
$T_{1/2}=162$ ns isomeric state of $^{18}$F and its $1^+$, 109.77-min ground
state has been utilized to study members of the ground-state rotational band in
$^{19}$F through the neutron transfer reaction $(d$,$p)$ in inverse kinematics.
The resulting spectroscopic strengths confirm the single-particle nature of the
13/2$^+$ band-terminating state. The agreement between shell-model
calculations, using an interaction constructed within the $sd$ shell, and our
experimental results reinforces the idea of a single-particle/collective
duality in the descriptions of the structure of atomic nuclei.
