Thank you for the opportunity to help you with your question! the solution is as such:
is a nucleosynthesis process that occurs in core-collapse supernovae and is responsible for the creation of
approximately half of the neutron-rich heavier than iron. The
process entails a succession of rapid neutron captures
(hence the name r-process) by heavy seed nuclei, typically 56Fe
or other more neutron-rich heavy isotopes.
206Pb then captures three neutrons, producing 209Pb, which decays to 209Bi by β− decay, restarting the cycle:
The process thus terminates in bismuth, the heaviest "stable"
element, and polonium, the first non-primordial element after bismuth.
(Bismuth is actually slightly radioactive, but with a half-life so
long—a billion times the present age of the universe—that it is
effectively stable over the lifetime of any existing star.)
Please let me know if you need any clarification. I'm always happy to answer your questions.awaiting a positive feedback. It was lovely helping you. Please do contact or text me directly for more work assistance. Looking forward to help you again.