What rapid neutron-capture process is responsible for forging elements heavier than iron during a supernova?

Answer

The r-process

During the extreme conditions of a supernova explosion, atomic nuclei are bombarded by a massive flood of neutrons very quickly, allowing for the rapid capture of neutrons (r-process) to build isotopes far heavier than iron, such as gold and uranium.

What rapid neutron-capture process is responsible for forging elements heavier than iron during a supernova?
Elementastronomystarmassnucleosynthesis