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Awide variety of polymer material effects are induced by thermal annealing. The effectiveness of a particular material is found
to vary not only with the thermal annealing but also with the type of ion and its energy and ionization rate i.e., with the
nature of the ion tracks. Moreover, a significant transformation of the registration properties of charged particles in these polymer
materials is induced by thermal annealing. An overview is presented of some thermal annealing experiments which were carried
out on the high polymer material poly allyl diglycol carbonate PADC (a form of CR-39) exposed to different radioactive sources.
This work highlights the fact that the annealed PADC films are highly sensitive to the fission fragments and particles heavier than
alphas (z ≥ 6), but not to alpha particles. Recent experiments have been performed at the Nuclear Physics Research Laboratory,
University of Benghazi. These show, without any doubt, that the response of thermally treated PADC material to charged particles
is not always restricted to heavy ions with high ionization rates; particles with low ionization rates is somewhat restricted.
Abdallah F. Saad earned his Ph.D. degree in 1993 from the University of Zagazig according to the channel system between Institute of Nuclear
Physics, Forschungszentrum J?lich, Germany and Zagazig University, Egypt, and postdoctoral studies from Aomori University, Japan. He is currently
serving as a visiting Professor at the University of Benghazi, Libya and is permanently working at Zagazig University. He has mainly participated in
several new findings. Recently, his current research focuses on studying material modifications induced by thermal annealing and radiation. He has
published more than 20 papers in reputed journals and serving as a reviewer of several international journals.
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