The passage of heavy ions in a track detector polymeric material produces lattice deformations.
These deformations may be in the form of latent tracks or may vanish by self annealing in time. Heavy ion
irradiation produces modifications in polymers in their relevant electrical, chemical and optical properties in the
form of rearrangement of bonding, cross-linking, chain scission, formation of carbon rich clusters and changes
in dielectric properties etc. Modification depends on the ion, its energy and fluence and the polymeric material. In
the present work, a study of the dielectric response of pristine and heavy ion irradiated Makrofol-KG polycarbonate
is carried out. 40 μm thick Makrofol-KG polycarbonate films were irradiated to various fluences with Si8+ ions of
100 MeV energy from Pelletron at Inter University Accelerator Centre (IUAC), New Delhi and Ne6+ ions of 145 MeV
from Variable Energy Cyclotron Centre, Kolkata. On irradiation with heavy ions dielectric constant ( ) decreases
with frequency where increases with fluence for both the ions. Variation of loss factor (tan ) with frequency
for pristine and irradiated with Si ions reveals that tan increases as the frequency increases. Tan also
increases with fluence. While Ne irradiated samples tan shows slight variation with frequency as well as with
fluence. Tan has positive values indicating the dominance of inductive behavior.Author Affiliation: Rajesh Kumar, S Asad Ali, Udayan De, D K Avasthi and Rajendra Prasad
1.Department of Applied Physics, Z H College of Engineering & Technology,
Aligarh Muslim University, Aligarh-202 002, Uttar Pradesh, India
2.Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata-700 064, India
3.Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi-110 067, India
E-mail : [email protected] of Applied Physics, Z H College of Engineering & Technology,
Aligarh Muslim University, Aligarh-202 002, Uttar Pradesh, India
Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata-700 064, India
Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi-110 067, Indi
