Electrical & Computer Engineering, Department of

 

Date of this Version

December 1974

Comments

Published in Physical Review Letters Volume 33, Number 23, 2 December 1974. Copyright © 1974 by the American Physical Society. Used by permission.

Abstract

We studied the fluorescence spectrum of E →B transitions in molecular iodine following two-photon absorption. Discrete re-emission lines terminating in B-state levels ranging from ν = 0 to the dissociation limit were observed in addition to a series of broad diffuse lines. These diffuse lines represent the first observation of Condon "internal diffraction” resulting from a single vibronic state, and therefore the variation of the bands directly displays the variation of the Franck-Condon factor.

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