Volume 131, Number 5, September 2020
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||21 September 2020|
The classical Doppler-broadened absorption line profile due to thermal effect
Department of Physics, Soochow University - Shih-Lin, Taipei 111, Taiwan
Received: 14 May 2020
Accepted: 24 August 2020
The classical Doppler-broadened absorption line profile, which is exactly derived by the classical Doppler effect and Maxwell speed distribution for the first time, is asymmetrically broadened with red-shift more than blue-shift, and its peak is red-shifted. Nonetheless, the half-width at half-maximum in the blue-shift wing is larger than that in the red-shift wing. The classical Doppler-broadened absorption line profile is different from the classical Doppler-broadened emission line profile. The classical Doppler-broadened absorption line profile is applied to disprove one of the two existing relativistic Doppler-broadened absorption line profiles. Also, line-shape models based on the classical Doppler-broadened absorption line profile are suggested for absorption line spectroscopy.
PACS: 32.70.Jz – Line shapes, widths, and shifts / 32.70.-n – Intensities and shapes of atomic spectral lines
© 2020 EPLA
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