Function

NumCosmoMathCmass_4He_u

Declaration [src] 

gdouble
ncm_c_mass_4He_u (
  void
)

Description [src]

Obtained from CIAAW commission of IUPAC, see [description][NcmC.description].

Return value

Type: gdouble

Helium-4’s mass over one atomic mass $m_\mathrm{4He}/m_\mathrm{A} = 4.00260325413$.