抄録
The escape factor of a resonance radiation, which have Voigt profile and emitted by resonance atoms distributed in parabolically in a infinite cylindrical discharge tube, was calculated. In the case of complete redistribution in frequency, the escape factor was calculated precisely by numerical method, and the Walsh's formula agree with precise numerical result within 10 percent. In the case of partial redistribution in frequency, the author derived a new formula of escape factor similar to the Walsh's formula from the spectrum given by Post. This new formula agree well with Payne's result for argon gas which was derived by transport equation of photons. The new formula also be able to improve the discrepancy between theory and experiment appear in the study of Ferreira and Loureiro.
