ABSTRACT
The Case of CO2 .............................................................................................66 3.8 Vibrational Feshbach Resonances as Doorway States to DEA:
The Case of N2O .............................................................................................69 3.9 π* Shape Resonances as Doorway States to DEA ......................................... 70
There is twofold interest in the measurement of the various quantitative cross sections described in this chapter. The “rst is direct use of the measured quantities to understand and to model systems where electron-molecule (atom) collisions occur, that is, technological plasmas, upper partially ionized layers of planetary atmospheres, comets, but also in ®ames. The second is providing data for testing various theories. The two areas are related. Experiments cannot measure all the quantities required for the applications, it is very hard to measure, for example, cross sections for reactive intermediates and for electronically excited atoms and molecules and these quantities must be provided by theory. On the other hand, development of a theory is not possible without experimental data for comparison.
