X-ray absorption spectroscopy (XAS) is a popular characterization technique for probing the local atomic structure and electronic properties of materials and molecules. Because atoms of each element ...
Absorption line spectroscopy is a cornerstone technique for probing the gas content, chemical enrichment and kinematics of galaxies in the early universe. By analysing the dark imprints left by ...
Weymann and Wilcox 1 have recently claimed that there is no evidence that the true occurrence of absorption lines in quasi-stellar objects (QSOs) is a function of red-shift. Such a conclusion, if true ...
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