Studying some properties of CR-39 detector under the effect of different gamma doses

Abstract

In the present study the bulk etch rate, the bulk activation energy, the track density and the degree of crystallinity percentage have been examined for gamma irradiated samples with 60 Co source at doses ranging from 0 to 200 kGy. After gamma irradiation the samples were exposed to zirconium sand to collect a-particle tracks. Samples were etched at 60, 65, 70, 75 and 80°C in 6.25 N NaOH solution for 4 h. Results indicated that, the bulk etch rate increases with the increase of gamma absorbed dose at different etching temperatures. The bulk activation energy and the track density decreased with the increase of the gamma absorbed dose. The degree of crystallinity percentage for un-etched and etched samples also has been studied for different gamma doses. The increase in bulk etch rate and the decrease in both of bulk activation energy and track density with increase in the gamma dose may be due to the degradation in CR-39 polymeric material. ª 2014 Production and hosting by Elsevier B.V. on behalf of University of Bahrain. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

Improvement in Optical Properties of Nuclear Track Detector

“…The poly-ally chain connected by di-ethylene glycol dicarbonate link form structure for CR-39 polymer. This structure containing three main functional groups: ally group, carbonyl group and ether group, which are responsible for the improvements in physicochemical properties after radiation exposure, so the presence of allyl group in the CR-39 structure makes it more sensitive for any type of radiation [2][3][4][5][6][7][8][9].…”

“…These particles do not caused tracks but can make weighty and sometimes intense effect on the properties of track [3][4]. The primary configuration of solid-state nuclear track detectors (SSNTD) such as CR-39 polymer destroys by the interaction of radiation with it, as well as heavy chemical variations take place in polymers under the effect of ionizing radiations (Xrays, gamma rays, fast and slow neutrons, fast electrons, alpha particles, protons, and other products of nuclear reactions) [5]. Form point of view the process of destruction makes by severance, cross-linking and release of molecules, atoms, and molecular fragments, this due to changes in some properties of SSNTD polymer like conductivity, density, optical absorption, molecular-weight distribution etc [3].…”

Effect of gamma irradiation doses on the spectroscopic, optical dispersion, and structural properties of Cr-39 nuclear track detector

“…This makes it more useful for many things, like glasses, optical absorption, infrared absorption spectra, and viscosity. Since Cr-39 is a well-known plastic in the family of solid-state nuclear path detectors, it is also used to study how ionizing radiation affects a solid-state nuclear path detector [1], [18]- [20]. It can keep better track of charged particles.…”