Electronic image state

Figure 15 Backscattered electron image of a FUN CAI from the Axtell CV3 chondrite. Except for its isotopic properties, this object is an ordinary t)fpe A CAI (photo courtesy of Dr. Gary Huss, Arizona State University after Srinivasan et al, 2000). Abbreviations as used previously.

The reorientation of the molecular adsorbates also induces a localization of the electron in the image state which is initially delocalized parallel to the surface. The localization phenomenon was proved by examining the emission angle dependence of the photoelectron spectra. It is concluded that the electrons in the delocalized state are trapped in the localized state at around 300 fs after the excitation, where the electron localization size is estimated to be 12 A. 

Fig. 2 Illustrating the mirror image relationship between absorption (A) and fluorescence (F), extant when the vibrational spacing are identical in ground and electronically excited states. 

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