Nonadiabatic dynamics electronic continua

First, we consider a schematic example to illustrate how the cation electronic structures can be used in (angle integrated) TRPES to disentangle electronic from vibrational dynamics in ultrafast nonadiabatic processes, depicted in Fig. 2. A zeroth- order bright state, a, is coherently prepared with a femtosecond pump pulse. According to the Koopmans picture [13, 41, 42], it should ionize into the a+ continuum, the electronic state of the cation obtained upon removal of the outermost valence electron (here chosen to be... 

From the point of view of chemical reaction dynamics, the most interesting case is that of unbound excited states or excited states coupled to a dissociative continuum that is, photodissociation dynamics. The dissociative electronically excited states of polyatomic molecules can exhibit very complex dynamics, usually involving nonadiabatic processes. The TRPES and TRCIS may be used to study the complex dissociation dynamics of neutral polyatomic molecules, and below we will give two examples of dissociative molecular systems that have been studied by these approaches, NO2 and (NO)2. 

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