Some chemical applications of PAT in liquids and solids

In principle, e+ and Ps could be used as probes to obtain information on a very large number of physical and chemical properties of matter. In practice however, application of these particles has been restricted to some specific areas, particularly those where conventional techniques are unable to provide any, or, at least, sufficient information. 

Information on properties or characteristics of matter is usually sought when these are studied as a function of some parameter (temperature, concentration, irradiation dose, etc). Besides some weaknesses on the theoretical side to predict absolute values of the measured PALS parameters (t2, I3 and even t3) the physico-chemical causes that may lead to specific values of these are usually not unequivocal PAT should not be considered as potential one-shot analytical techniques. 

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