|Author||Kumar, Rajesh ♦ Ali, S. Asad ♦ De, Udayan ♦ Avasthi, D. K. ♦ Prasad, Rajendra|
|Publisher||Indian Association for the Cultivation of Science|
|Subject Domain (in DDC)||Natural sciences & mathematics ♦ Physics|
|Subject Keyword||Makrofol-KG polycarbonate ♦ Silicon and Neon Ions ♦ Ion Beam Modification ♦ Dielectric Constant ♦ Dielectric Loss|
|Abstract||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 ionirradiation produces modifications in polymers in their relevant electrical, chemical and optical properties in theform of rearrangement of bonding, cross-linking, chain scission, formation of carbon rich clusters and changesin dielectric properties etc. Modification depends on the ion, its energy and fluence and the polymeric material. Inthe present work, a study of the dielectric response of pristine and heavy ion irradiated Makrofol-KG polycarbonateis carried out. 40 μm thick Makrofol-KG polycarbonate films were irradiated to various fluences with Si8+ ions of100 MeV energy from Pelletron at Inter University Accelerator Centre (IUAC), New Delhi and Ne6+ ions of 145 MeVfrom Variable Energy Cyclotron Centre, Kolkata. On irradiation with heavy ions dielectric constant ( ) decreaseswith frequency where increases with fluence for both the ions. Variation of loss factor (tan ) with frequencyfor pristine and irradiated with Si ions reveals that tan increases as the frequency increases. Tan alsoincreases with fluence. While Ne irradiated samples tan shows slight variation with frequency as well as withfluence. Tan has positive values indicating the dominance of inductive behavior.|
|Education Level||UG and PG|
|Learning Resource Type||Article|
|Journal||Indian J Phys|
Ministry of Human Resource Development (MHRD) under its National Mission on Education through Information and Communication Technology (NMEICT) has initiated the National Digital Library of India (NDLI) project to develop a framework of virtual repository of learning resources with a single-window search facility. Filtered and federated searching is employed to facilitate focused searching so that learners can find out the right resource with least effort and in minimum time. NDLI is designed to hold content of any language and provides interface support for leading vernacular languages, (currently Hindi, Bengali and several other languages are available). It is designed to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is being developed to help students to prepare for entrance and competitive examinations, to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is being developed at Indian Institute of Technology Kharagpur.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Human Resource Development (MHRD), through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
For any issue or feedback, please write to firstname.lastname@example.org