Experimental Aspects of Electron Impact Ionization and Excitation of Positive Ions

Dolder,K.T.: 1986, p. 213 of 'Atomic and Molecular Physics of Controlled Thermonuclear Fusion.', eds Joachain,C.J., Post,D.E., Plenum Press, 1986.

Plasmas of greatest interest in fusion and astrophysics are not in thermodynamic equilibrium so that details of each significant atomic process are needed to construct theoretical models and interpret observations. Two of the most important types of reaction are electron impact ionization and excitation. In plasmas which are 'thin' to electromagnetic radiation, the ionization equilibrium and hence all important plasma properties is mainly determined by the balance between the rates of ionization and recombination. Electron impact is usually the dominant ionization process and when molecular ions are absent, this is primarily balanced by dielectronic (three body) and radiative recombination.


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