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Primordial helium mass fraction

If almost all neutrons enter helium-4 and

r = n_{n} / n_{p}

, its primordial mass fraction is

Y_{p} ≃ 2 r / (1 + r)

.

Table of contents 53 2
- Neutron-limited helium synthesis Primordial helium mass fraction 17
- Primordial composition and stellar lifetime Primordial helium mass fraction 20

 Ancestors (5)