Neutronization - The process, such as within a collapsing star, in which protons and electrons fuse to form neutrons and release neutrinos
Chandrasekhar mass - The Chandrasekhar limit is the maximum mass of a stable white dwarf star.
Stellar nucleosynthesis is the process by which the natural abundances of the chemical elements within stars vary due to nuclear fusion reactions in the cores and overlying mantles of stars. Stars are said to evolve (age) with changes in the abundances of the elements within.
Neutron capture - is a nuclear reaction in which an atomic nucleus and one or more neutrons collide and merge to form a heavier nucleus.
Nova- explosion of a white dwarf, causes a brightening of the star, occur on the surface of a white dwarf in a binary system, companion star can pull mass if they are in close proximity; recurring nova has multiple outbursts
Supernova- stellar explosion that outshines the entire galaxy; radiates as much energy as the entire Sun’s lifespan; expels the stars material; triggered by re-ignition of nuclear fusion in a degenerate star or by gravitational collapse of the core of a massive star
Photodisintegration- high energy gamma ray is absorbed by an atomic nucleus resulting in an excited nucleus that immediately decays by emitting a subatomic particle; reverse of nuclear fusion; endothermic for elements lighter than iron and exothermic for heavier ones
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