File:Nuclear abundances.png

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English: The abundances of the following light element nuclei during Big Bang Nucleosynthesis, as a function of time since the Big Bang in seconds (lower axis) or the Standard Model plasma temperature in megaelectronvolts (upper axis):

neutrons (n) protons (p) deuterium (d, aka 2H) tritium (t, aka 3H) helium-3 (3He) helium-4 (4He) lithium-7 (7Li) beryllium-7 (7Be) lithium-6 (6Li) lithium-8 (8Li) beryllium-8 (8Be) boron-8 (8B).

The y-axis is the number density of each individual species (n_i) divided by the number of baryons (n_b).
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Author MyxococcusFruitingBody

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The abundances of light element nuclei during Big Bang Nucleosynthesis

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9 January 2026

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