CR-39 is a polycarbonate widely used as SSNTD for recording nuclear charged particles
and in other applications. Latent ion tracks produced in the polymers due to the damage
produced by the passage of Swift Heavy Ions contain amorphous material with highest
degree of disorder, changing the free volume properties which have strong correlation with
the macroscopic properties of the material. Positron annihilation lifetime spectroscopy
(PALS) provides direct information about the dimension, content and hole size distribution of …