  In this study, we analyzed how the incident neutron current is affected by
the pairing effect in the neutron-nucleus scattering described within the
framework of Hartree-Fock-Bogoliubov theory by performing numerical
calculations in terms of current, vorticity, and circulation of the incident
neutron current. We found that the pairing effect on the incident neutron flux
is completely different between particle-type and hole-type quasiparticle
resonances. In the case of h-type quasiparticle resonance, the pairing acts to
prevent the neutron flux from entering the nucleus, reducing circulation. In
the case of p-type quasiparticle resonance, pairing acts to reduce circulation
at energies lower than the resonance energy, but at energies higher than the
resonance energy, the effect of pairing on the neutron flux is reversed and,
conversely, circulation is increased.
