Abstract
In a number of recent experiments, the Isolated Core Excitation (ICE)1 method for producing doubly excited Rydberg states has been extended to two photon core excitations.2,3 One particularly novel experiment showed that it is possible to use two photon excitation even in the case where the single photon excitation moment is zero.3 Furthermore, an analytical, closed form expression for this two photon core excitation moment has been reported.4 This work extends that analysis to the general case, where the core has absorbed n independent photons.
© 1986 Optical Society of America
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