Ultra-High Resolution Atomic and Molecular Spectroscopy at the Advanced Light Source
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Ultra-bright ultraviolet and soft X-ray beams produced at the Advanced Light Source are achieving world records in spectroscopic resolution. High-resolution spectroscopy in the 20 to 300 eV photon energy range has been applied to photoionization yield and photoemission measurements in atoms and molecules to reveal previously unseen resonance series in doubly-excited autoionizing states of helium, to analyze angular distributions in photoemission from doubly-excited states of helium and other rare gases, to reveal vibrational and ligand-field splitting of small molecules through photoionization, and, to examine photoemission from doubly- and triply-excited hollow lithium atomic states.
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