Conical space emerges inevitably as an outer space of any topological defect
of the vortex type. Quantum-mechanical scattering of a nonrelativistic particle
by a vortex centred in conical space is considered, and effects of the
transverse size of the vortex are taken into account. Paradoxical peculiarities
of scattering in the short-wavelength limit are discussed.Comment: 17 pages, 2 figures, minor change