What process is responsible for creating elements heavier than iron, such as gold and platinum?

Answer

Rapid neutron capture (r-process) during a supernova

Since fusion cannot create elements heavier than iron in the core, the formation of these elements occurs during the catastrophic collapse and subsequent supernova explosion via rapid neutron capture.

What process is responsible for creating elements heavier than iron, such as gold and platinum?
ElementprocessstarFusionnucleosynthesis