 Characterization of electronic transitions in complex molecules by Michael Kasha

Michael Kasha, Discussions of the Faraday Society9,14–19(1950). Original paper text inspected via scan at www.scribd.com/document/834716858/Kasha-1950 , not the host-generated summary. Printed p.14 abstract and p.15 Internal Conversion: relationship between radiationless transitions among states of like multiplicity and the lowest excited emitting level. These are spectroscopic regularities discussed for the studied molecules, not an assertion of an exception-free law.