What pressure momentarily halts the collapse after the iron core implosion in a massive star, leading to a Type II explosion?

Answer

Neutron degeneracy pressure

During a Type II supernova, gravity overwhelms electron degeneracy pressure, causing collapse until neutron degeneracy pressure briefly halts the process, leading to the observed bounce.

What pressure momentarily halts the collapse after the iron core implosion in a massive star, leading to a Type II explosion?
starsupernovaastrophysicsmass