Assertion: process | /r/AtLocation | star
Facets:
value: of pure h
type: OTHER
value: of he
type: LOCATION
Source sentences:
text: The creation of free neutrons by electron capture during the rapid collapse to high density of a supernova core along with quick assembly of some neutron-rich seed nuclei makes the r-process a primary nucleosynthesis process, meaning a process that can occur even in a star initially of pure H and He, in contrast to the B2FH designation as a secondary process building on preexisting iron.