The predictions of the element abundances in the "standard", hot, big bang cosmological model (SBBN) are described.
The more oxygen and nitrogen a region of space contains, the more its light element abundances are bound to have been influenced by stellar nuclear fusion.
The most direct - and thus most solid - prediction of Big Bang Nucleosynthesis concerns helium-4, each nucleus of which consists of two protons and two neutrons.
All carbon-based life on Earth is literally composed of stardust.
In 1948, Physicist George Gamow hypothesized that all of the elements might have been made in the hot and dense early universe.
Alpher and Herman found that Gamow was wrong: most elements could not have been made in the early universe. Neutrons decay in about 10 minutes, and their density decreases as the universe expands in that time.
There just isn't enough time to keep building up to the heavier elements before the neutrons are gone. Only the lightest elements are built up in the early universe.
Fortunately for astronomers, there are indicators of how much chemical evolution particular objects have undergone, most importantly the presence of elements such as oxygen and nitrogen.
These are elements with nuclei that are produced by nuclear fusion reactions in stars, but that definitely could not have been produced during Big Bang Nucleosynthesis.
A brief overview can be found in the spotlight text Big Bang Nucleosynthesis: Cooking up the first light elements.
This text, in contrast, is concerned with the crucial question: If we want to test these predictions, how do we determine the original ("primordial") abundances of the different light nuclei?
Comments Nucleosynthesis Of Light Elements
Light Element Nucleosynthesis
Nucleosynthesis In The Early. Universe. The primordial yields of light elements are determined by the competition between the expansion rate of the. Universe.…
Big Bang Nucleosynthesis Cooking up the first light elements.
How the first nuclei of helium, lithium and other light elements were cooked up shortly after the big bang.…
How are light and heavy elements formed? Advanced.
The lightest elements hydrogen, helium, deuterium, lithium were produced in the Big Bang nucleosynthesis. According to the Big Bang theory.…
Elements of the past Big Bang Nucleosynthesis and observation
How to reconstruct the abundances of light elements shortly after the big bang. The theory of nucleosynthesis during the first few minutes after the big bang.…
Nucleosynthesis - Wikipedia
Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons. Stars fuse light elements to heavier ones in their cores, giving off energy in the process known as stellar nucleosynthesis. Fusion processes create.…
Formation of Light and Heavy Elements - SlideShare
The Origin of Light Elements The origin of all the naturally occurring elements fall into two phases •Big Bang or Primordial Nucleosynthesis.…
Big Bang Nucleosynthesis
The Universe's light-element abundance is another important criterion by which the Big Bang hypothesis is verified. It is now known that the elements observed.…
WMAP Big Bang Elements Test
Tests of Big Bang The Light Elements. Nucleosynthesis in the Early Universe. The term nucleosynthesis refers to the formation of heavier.…
ORIGIN OF THE LIGHT ELEMENTS - UBC
In addition there are the light particles leptons, such as electrons, neutrinos and. is no stable element of mass 5, nor of mass 8, so additional nucleosynthesis.…