= Sergey Vavilov
{c}
{tag=Physicist}
= S. I. Vavilov
{c}
{synonym}
An <optical physicist> who studied <luminescence>, including its quenching by impurities and concentration changes. His distinction between persistent excited-state emission and other light-generation mechanisms helped frame the analysis of radiation observed by <Pavel Cherenkov>. Measuring how emission changes with its environment thus served both as a probe of excited matter and as a way to distinguish different physical sources of light.<Sergey Ivanovich Vavilov by Russian Academy of Sciences>[Scientific-work account: quenching, definition of luminescence and Cherenkov investigations]{ref}
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