Quantum yield: the term and the symbol. A historical search.
Einstein's Photochemical Equivalence Law, i.e. one quantum of light absorbed per molecule, played a very important role in the development of photochemistry in the early part of the 20th century. The corresponding terminology, quantum yield and its symbol Phi, became accepted usage in a haphazard manner, which is presented in this paper.
Rubin
Mordecai B
MB
Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel. chrubin@tx.technion.ac.il
Braslavsky
Silvia E
SE
D049673:History, 20th Century; D049674:History, 21st Century; D011789:Quantum Theory