Electron transmission spectroscopy ETS

Photoelectron spectroscopy (PES) Q, and more recently electron transmission spectroscopy (ETS) (3, 4) have provided much information on the cation and anion states, respectively, of many hydrocarbons. Within the context of the Koopmans Theorem (KT) approximation, the cation states can often be associated with the filled orbitals and the anion states with the unfilled orbitals of a molecule. In this sense these two methods are complementary. However there are important distinctions between these two spectroscopic methods which arise in part from the very different lifetimes of the anions and cations. 

In this paper we have tried to give the reader a general overview of the types of chemical information that can be obtained from electron transmission spectroscopy. ETS appears to be ideally suited for studying temporary anions formed by the cap-... 

The temporary anions associated with low-lyin unfilled orbitals generally have lifetimes in the range of 10 - 10 s in the gas phase. This paper discusses the use of electron transmission spectroscopy (ETS) to provide information on these short-lived anions. The sensitivity of the lifetimes to changes in symmetry is illustrated by comparing the electron transmission of benzene and various alkyl substituted benzenes. 

This paper summarizes the first investigations of three- and four-membered ring compounds by the technique of electron transmission spectroscopy (ETS). He will briefly discuss two general areas associated with the negative ion states of small ring hydrocarbons ... 

Electron transmission spectroscopy (ETS) results due to Aflatooni etal. (1998). ForG, VEA was estimated for keto tautomer from enol tautomer experimental value (-0.46 eV) plus the calculated difference in total energies between the two tautomers (0.28 eV). 

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