  We demonstrate resonances due to coherent population pumping in a bright
state (CBS), using magnetic sublevels of the closed $ F_g = 2 \rightarrow F_e =
3 $ transition in $^{87}$Rb. The experiments are performed at room temperature
vapor in two kinds of cells---one that is pure and the second that contains a
buffer gas of Ne at 20 torr. We also present the effect of pump power variation
on the CBS linewidth, and explain the behavior by using a power-dependent
scattering rate. The experimentally observed CBS resonances are supported by a
density-matrix analysis of the system.
