Angular Correlation of Annihilation Radiation ACAR Method

3 Angular Correlation of Annihilation Radiation (ACAR) Method 

4 Doppler Broadening of the Annihilation Radiation (DBAR) Method 

In polymers, the o-Ps intensity (I3) is a measiue of relative number of free volume cavities, and it also represents the probability of Ps formation in such 

I 27 Positron Annihilation Spectroscopy Polymer Blends and Miscibility 

Few successful attempts were made in ascertaining this connection [123]. Normally, BET is the standard method used to measure the surface area of mesopores (pores between 2 and 50 nm), but the predictions of Eq. (27.17) have been well supported by BET measurements. Therefore, this relation is effectively used in the development of hydrodynamic interaction method described in the following sections. 

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