Calibration Factor for LR 115 Type II Detectors Used to Measure Indoor 220Rn
نویسندگان
چکیده
منابع مشابه
Derivation of V function for LR 115 SSNTD from its sensitivity to 220Rn in a diffusion chamber.
The sensitivity of the LR 115 detector inside a diffusion chamber to (220)Rn gas concentration is dependent on the removed active layer thickness during chemical etching. This dependence is related to the V function for the LR 115 detector (where V is the ratio between the track etch velocity V(t) and the bulk etch velocity V(b)) and the geometry of the diffusion chamber. The present paper pres...
متن کاملStudies on The Etching Time For Lr-115 Type II Films
According to the manufacturer (Kodak pathe) of the LR-115 Type 2 films, which are widely used in environmental radioactivity studies, the exposed films should be etched in 10% solution of NaOH, while the temperature of the etching solution is to be kept at 60C. The optimum time of etching depends on different conditions; like geometry of the bath, temperature etc. To determine the optimal etchi...
متن کاملIndoor 222Rn and 220Rn variations: Evidence for Boyle’s law
Background: Radon and its daughter product are a major source of natural radiation exposure, the measurement of radon concentration in dwellings is assuming ever increasing importance. It is known from recent surveys in many countries that radon and its progeny contributes significantly to total inhalation dose and is well established that radon when inhaled in large quantity causes lu...
متن کاملSensitivity of LR 115 detectors in hemispherical chambers for radon measurements
We have determined the detection sensitivity of the LR 115 detector placed on the bottom of hemispherical diffusion chambers through Monte Carlo simulations. For the cases where the LR 115 detectors completely cover the bottom of hemispherical diffusion chambers, we propose the optimum radius of the hemispherical chamber as 3 cm. In hemispherical chambers with radii smaller than 3 cm, the total...
متن کاملTheoretical basis for long-term measurements of equilibrium factors using LR 115 detectors.
In this paper, we propose a method to determine the equilibrium factor using a bare LR 115 detector. The partial sensitivities rhoi of the LR 115 detector to 222Rn and its alpha-emitting short-lived progeny, 218Po and 214Po, were investigated. We first determined the distributions of lengths of major and minor axes of the perforated alpha tracks in the LR 115 detector produced by 222Rn, 218Po a...
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ژورنال
عنوان ژورنال: Journal of Environmental & Analytical Toxicology
سال: 2017
ISSN: 2161-0525
DOI: 10.4172/2161-0525.1000476