Particularization of alpha contamination using CR-39 track detectors

Abstract

Solid-state nuclear track detectors have found wide use in various domains of science and technology, e.g. in environmental experiments. The measurement of alpha activity on sources in an environment, such as air is not easy because of short penetration range of alpha particles. Furthermore, measurement of alpha activity by most gas ionization detectors suffers from high background induced by the accompanying gamma radiation. Solid state nuclear track detectors (SSNTDs) have been used successfully as detecting devices and as a passive system to detect alpha contamination on different surfaces. This work presents the response of CR-39 (for two types) to alpha particles from two sources, 238 Pu with energy 5 MeV and 241 Am with energy 5.4 MeV. The methods of etching and counting are investigated, along with the achievable linearity, efficiency and reproducibility. The sensitivity to low activity and energy resolution are studied.

Fusion reactions initiated by laser-accelerated particle beams in a laser-produced plasma

“…Track detectors CR-39, [30], covered by aluminum foils of various thickness between 6 and 80 µm were used to collect impacts by both protons and α-particles. Six detectors were used for each shot with angles 0, 15, 35, 70, 100 and 170 0 from the picosecond beam axis (0 0 is the forward direction).…”

Examination of Energy Resolution of Track Detector LR-115 to Distinguish the Various Energies of Alpha Particles (1-4MeV) Using the Wblfit formula Fitting in Matlab Software

“…Another study presents the response of CR-39 (for two types) to alpha particles from two sources, 238 Pu with energy 5 MeV and 241 Am with energy 5.4 MeV, the methods of etching and counting are investigated, along with the achievable linearity, efficiency and reproducibility. The sensitivity to low activity and energy resolution are studied (Zaki and El-Shaer, 2007).…”

Calculation the optical energy band gap of LR115 SSNTD irradiated by α particle

“…The polymeric materials were depending on the irradiation influence and on radiation energy used. Interaction of the radiation or highly energetic charged ion strikes a polymer target; it loses most of its energy in exciting or ionizing the atoms along its trajectory [7]. Target ionization causes bond cleavage (scission), crosslinking, degradation, emission of atoms and molecules [7].…”

“…Interaction of the radiation or highly energetic charged ion strikes a polymer target; it loses most of its energy in exciting or ionizing the atoms along its trajectory [7]. Target ionization causes bond cleavage (scission), crosslinking, degradation, emission of atoms and molecules [7]. Ion beam bombardment is a suitable tool to modify the physicochemical properties of polymers (CR39), known polymer, is used in diverse fields such as neutron dosimetry, gamma and cosmic ray detection, heavy ion and nuclear physics [7].…”