The measurements of thoron, radon and their decay products thanks to Pinocchio, Tengu and Trolls
Authors: Tommasino, L.; Tokonami, S.; Tommasino, P. M.
Source: Radiation Protection Dosimetry, Volume 141, Number 4, November 2010 , pp. 340-345(6)
Publisher: Oxford University Press
Abstract:In the present paper, the long noses of Pinocchio, Tengu and Trolls are used to measure, respectively, radon, thoron, and their decay products both by track-etch detectors and by GeigerMller (GM) counters. Just recently, four new passive samplers (termed quatrefoil) have been developed which greatly simplify the detection of all airborne radionuclides by using either passive or real-time detectors. In particular, surface-deposited radon (thoron) decay products are sampled by films with large area and small surface density (0.11 mg cm2). Once exposed, these films are stacked together for their detection by a pancake GM counter. For the measurements of radon and thoron in soil, 25-cm-long tubes with sampling films along their internal surfaces can be successfully used. Once exposed, these films can be counted by a pancake GM for the selective measurement of radon and thoron.
Document Type: Research Article
Publication date: November 2010
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