Abstract
The resonance escape factors of helium 10830.34 Å, 10830.25 Å and 10829.08 Å that making up the 10830 Å emission lines are calculated, for both Lorentzian profile and Voigt profile. The total number of absorbing atoms in the ground state is calculated. The dependence of the escape factors on the optical depth in the line center is considered. The resonance escape factors of helium 3889 and 3118 emission lines are discussed also. This calculation is useful in the research on the helium in the sun and remote stars from the helium emission lines.
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