What Finally Halts the Core Collapse in the Initial Stages

question 56

Multiple Choice

What finally halts the core collapse in the initial stages of the formation of a Type II supernova?

• A) The core becomes a singularity, with all matter concentrated at a single point.
• B) The iron core stiffens when it reaches the density of nuclear matter, producing the core bounce.
• C) The iron core becomes hot enough to begin fusion reactions, which produce a uranium core.
• D) The temperature becomes great enough to produce radioactive nuclei.