Comparison of coherent forward scattering and atomic absorption profiles of O I 844.6-nm and Ar I 842.5-nm lines in the pulsed and continuous radio-frequency glow-discharge plasmas

摘要

Comparison of the coherent forward scattering (CFS) and atomic absorption (AA) of the O I 844.6- nm and Ar I 842.5 -nm lines was performed in pulsed and continuous radio-frequency glow discharge (GD) plasma. Zeeman splitting of the conventional AA spectra and the self-absorption profile of CFS radiation could be observed for different magnetic fields, above similar to 50 and similar to 10 mT, respectively. The calculation of the axial variation of the magnetic field of the GD tube and the magnetic field determined by the measured Zeeman splitting allowed us to determine the locations of the highest and the second highest relative maximum of the number density of excited argon atoms in the lower state of the Ar I 842.5-nm transition.