PINNING PROPERTIES OF SUPERFLUID VORTICES IN THE CRUST OF NEUTRON-STARS

We evaluate the neutron superfluid pinning energy in the inner crust o f a neutron star, where a gas of free neutrons cohexists with a lattic e of neutron-rich nuclei, in the framework of the local density approx imation and using Gogny effective force. We find that non-uniform pair ing gap of the superfluid neutrons strongly affects the pinning proper ties of a vortex-nucleus system. Clear evidence for strong, weak and s uperweak pinning regimes are given. Comparison of our results with pre vious calculations are also shown.