  The toroidal, compression and vortical dipole strength functions in
semi-magic $^{124}$Sn (and partly in doubly-magic $^{100,132}$Sn) are analyzed
within the random-phase-approximation method with the SkT6, SkI3, SLy6, SV-bas,
and SkM* Skyrme forces. The isoscalar (T=0), isovector (T=1), and
electromagnetic ('elm') channels are considered. Both convection $j_c$ and
magnetization $j_m$ nuclear currents are taken into account. The calculations
basically confirm the previous results obtained for $^{208}$Pb with the force
SLy6. In particular, it is shown that the vortical and toroidal strengths are
dominated by $j_c$ in T=0 channel and by $j_m$ in T=1 and 'elm' channels. The
compression strength is always determined by $j_c$. It is also shown that the
'elm' strength (relevant for (e,e') reaction) is very similar to T=1 one. The
toroidal mode resides in the region of the pygmy resonance. So, perhaps, this
region embraces both irrotational (pygmy) and vortical (toroidal) flows.

Nuclear Theory