What phenomenon is observed when the outward explosion results from the material slamming into the newly formed dense core?

Answer

A Type II Supernova

The impact of falling outer material onto the incompressible neutron core generates a powerful outward shock wave, resulting in an explosion observed as a Type II Supernova.

What phenomenon is observed when the outward explosion results from the material slamming into the newly formed dense core?
evolutionstarsupernovaastrophysicsmass