Physics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...15..240p&link_type=abstract
(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 15th, Houston,
Physics
3
Fraunhofer Lines, Lunar Luminescence, Solar Spectra, Sunlight, Frequency Shift, H Alpha Line, Inelastic Scattering, Light Scattering, Spectral Line Width, Moon, Luminescence, Wavelengths, Surface, Scattering, Observations, Reflection, Source, Hypotheses, History
Scientific paper
The filling-in of Fraunhofer lines in moonlight has been attributed to lunar luminescence. In order to test mechanisms proposed for this effect, measurements were made of the filling-in of the H-alpha line, the Na D doublet, and a number of lines near the doublet. The degree of filling-in was not correlated with wavelength in a way expected from a broadband luminescence, such as thermoluminescence. However, it was correlated with equivalent width of the Fraunhofer line, such that it increased as equivalent width decreased. This suggests that the Fraunhofer line filling at the moon's surface is caused by inelastic scattering of sunlight with a small wavelength shift, as for example, photon-phonon scattering.
Mendel W.
Morgan Th.
Potter Andrew E.
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