VORTEX WAVES ON A NUCLEAR-SURFACE

In heavy-ion collisions a localized stable or long lived excitation mi ght develop, The existence of a fairly well defined nuclear surface ma kes it possible to discuss localized excitations in the nuclear surfac e region. In the framework of semiclassical nonlinear nuclear hydrodyn amics we have presented a type of vortical excitation that are new in nuclear physics. We have found a class of uniformly rotating solutions to nonlinear Euler-type equations on a sphere. The equations of motio n describing a localized vortex on a spherical nuclear surface-a bound ed region of constant vorticity, surrounded by irrotational flux-are d erived. The qualitative analysis of the main properties of this vortex is presented. These excitations may be linked with hot spots created in peripheral heavy-ion collisions.