The nature of the 760 nm Fraunhofer line in the solar spectrum

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Authors

Inna Tkachenko¹

Conference / event: 26th All-Ukrainian Scientific Conference for Young Scientists "Topical Problems of Natural Sciences and Humanities in the Studies of Young Scientists", May 2024 (Cherkasy, Ukraine)

Poster summary: This work is devoted to the study of the Fraunhofer line 760 nm origion in the solar spectrum, which is formed as a result of absorption by the Earth’s atmospheric oxygen. The study of the nature of this line is important for the development of atmospheric spectroscopy and the study of physical and chemical processes occurring in the middle and upper layers of the Earth's atmosphere. The results of the study indicate that for a free oxygen molecule the absorption of visible light occurs due to the weak interaction of the magnetic field of the light wave with the spin of the molecule. The Fraunhofer line in the 760 nm region arises from the O2 (1Σg+ – 3Σg-) transition due to spin-orbit coupling between these states being determined by the magnetic dipole transition moment and takes the intensity from the microwave transition between the spin magnetic sublevels 3Σg,0- - 3Σg,1-.

Keywords: Red atmospheric band, Spin-orbit coupling, Magnetic transition moment, Oxygen molecule

References

Boris Minaev. Environment friendly spin-catalysis for dioxygen activation. Chemistry & Chemical Technology, 2010, 4 (1), 1-16. DOI: 10.23939/chcht04.01.001.
Boris F. Minaev, Valentina A. Minaeva, Yurij V. Evtuhov. Quantum-Chemical Study of the Singlet Oxygen Emission. Int. J. Quant. Chem., 2008, 109 (3), 500-515. DOI: 10.1002/qua.21783.
Boris Minaev, Olav Vahtras, Hans Ågren. Magnetic phosphorescence of molecular oxygen. A study of the b1Σg+-X3Σg- transition probability using multiconfiguration response theory. Chemical Physics 208 (1996) 299-311.
B.F. Minaev. Solvent induced emission of molecular 1Δg oxygen. Journal of Molecular Structure (Theochem), 183 (1989) 207-214.

Additional information

Data availability statement: The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license: Copyright © 2024 Tkachenko. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.