Abstract
A knowledge of the interactions of radiation with molecular liquids such as glycerol, water and benzene has direct biological application in terms of understanding radiation damage to living material. Not only the amount of energy but the modes of energy deposition can be extracted from the dielectric functions if these are known over a sufficiently wide energy range. The experimental techniques and methods of data analysis which yield the dielectric functions are reviewed. The conditions necessary for the existence of collective electron effects in molecular liquids are considered and the collective behavior associated with a single oscillator and with a collection of oscillators is compared with the behavior of a free-electron gas. Experimental spectra for some molecular liquids in the energy region from 0 to 26 eV are analyzed for the degree of collective behavior exhibited.
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