A further study of the (CR-LR) difference technique for retrospective radon exposure assessment

D. Nikezic; C. W Y Yip; S. Y Y Leung; J. K C Leung; K. N. Yu

doi:10.1016/j.nima.2006.08.084

Author(s)

D. Nikezic
C. W Y Yip
S. Y Y Leung
J. K C Leung
K. N. Yu

Detail(s)

Original language	English
Pages (from-to)	792-798
Journal / Publication	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	568
Issue number	2
Publication status	Published - 1 Dec 2006

Link(s)

DOI	DOI https://doi.org/10.1016/j.nima.2006.08.084 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-33750835652&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(7373eeb7-3fa7-45ae-8e00-f0aec263530a).html

Abstract

The (CR-LR) difference technique, based on the CR-39 and LR 115 detectors, for the determination of implanted ²¹⁰Po in glass after deposition of short-lived radon progeny, was analyzed in details in this paper. The sensitivities of both detectors were calculated using the Monte Carlo method with V functions particularly derived in our previous works for the detectors used in the present experiments. The dependency of the sensitivity ratio on the removed layer of both detectors was determined and verified experimentally. The simulated sensitivity ratios correlate well with the experimental ones. A major finding of the present work is that the sensitivity ratio between the CR-39 and LR 115 detectors depends only weakly on the ratio between the ²³⁸U and ²³²Th concentrations in the glass samples. This is crucial for the application of the (CR-LR) difference technique for retrospective radon exposure assessments, since measurements of the ²³⁸U and ²³²Th concentrations in the relatively small real-life glass samples will make the retrospective radon exposure assessments impractical. © 2006 Elsevier B.V. All rights reserved.