What mechanism successfully halts the core collapse to form a neutron star after a Type II Supernova?

Answer

Neutron degeneracy pressure resists further compression

If the mass of the collapsing core is within a specific intermediate range (between roughly 1.4 and 3 solar masses), the matter is compressed so tightly that neutrons resist further collapse, forming an incredibly dense neutron star.

What mechanism successfully halts the core collapse to form a neutron star after a Type II Supernova?
evolutionhydrogenCorestarFusion