Physics:Isogenous series

From HandWiki

Isogenous is a term occasionally used in spectroscopy that denotes when two or more spectroscopic series of transition from a common state. The word was first used in this context in T.J. Stone & R.F. Barrow Laser excited fluorescence spectra of gaseous Te2, Canadian Journal of Physics. Vol. 53, p. 1976, October 1975. In this case, an excited state of gaseous Te2 was pumped by an Argon ion laser; the excited state then relaxed to two closely separated low lying states giving two series of emission lines with a common origin.