IT appears that study of the absorption spectra of the silver halide vapours has, with the exception1 of silver chloride, hitherto been confined to wavelengths above about 2500 A. We have recently photographed the absorption spectra of silver bromide and iodide in the range 2150–3000 A. with a Hilger medium quartz instrument. Within rather critical pressure limits, red-degraded absorption bands are observed in the region 2150–2475 A. for silver bromide and 2150–2350 A. for silver iodide.
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Theoretical Chemistry Accounts (2006)