Noun
(astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom
Source: WordNetAlmost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime, and for some stars by supernova nucleosynthesis when it explodes. Source: Internet
Before nucleosynthesis began, the temperature was high enough for many photons to have energy greater than the binding energy of deuterium; therefore any deuterium that was formed was immediately destroyed (a situation known as the deuterium bottleneck). Source: Internet
As it happened, both Lemaître and Hoyle's models of nucleosynthesis would be needed to explain the elemental abundances in the universe. Source: Internet
A very influential stimulus to nucleosynthesis research was an abundance table created by Hans Suess and Harold Urey that was based on the unfractionated abundances of the non-volatile elements found within unevolved meteorites. Source: Internet
Characteristics There are two important characteristics of Big Bang nucleosynthesis (BBN): * The era began at temperatures of around 10 MeV (116 gigakelvin ) and ended at temperatures below 100 keV (1.16 gigakelvin). Source: Internet
Because of the very short period in which nucleosynthesis occurred before it was stopped by expansion and cooling (about 20 minutes), no elements heavier than beryllium (or possibly boron ) could be formed. Source: Internet