Methods Starting point of the analysis is the Linear Non Threshold (LNT) assumption for radiation stochastic effect [1]: for effective doses (E) below 100 mSv, the probability of future stochastic damage is linearly related to E. This allows to add E from different sources to calculate a cumulative risk of health detriment. Data coming from literature were gathered to determine the average E de...

The fraction of unattached (fun) nanosized 222Rn short-lived decay products in indoor air has been measured in different environments and the following ranges obtained: 0.03-0.25 in kindergartens, 0.03-0.18 in schools, 0.08-0.20 in wineries, and 0.12-0.68 in a karst cave. The dependence of fun on the environmental conditions (air temperature, relative humidity and pressure), as well as on the w...

We have measured the stable isotope ratios of carbon in a suite of recent cave deposits (< 200 years) from the San Saba County, Texas, USA. The methodology for dating these deposits using excess 210pb was recently established [Baskaran and Iliffe, 1993]. The carbon isotope ratios of these samples, spanning the thne period -• 1800-1990 AD, reflect the carbon isotope ratio of atmospheric CO2 for ...

The study concerns the analysis of 220Rn (thoron) recorded in surface soil two sites Campi Flegrei caldera (Naples, Southern Italy) characterized by phases volcanic unrest seven-year period 1 July 2011–31 December 2017. Thoron comes only from most layer, so characteristics its time series are strictly connected to shallow phenomena, which can also act at a distance measuring point these particu...

Department of Nuclear Engineering, Graduate School of Enginering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan ABSTRACT Radon (Rn) diffusion coefficient as one of some important parameters of Rn transport in the soil has been measured using soil radon diffusion monitor (SRDM). The system of SRDM consists of two scintillation detectors, sample container located between these detectors,...

Exposure to 222Rn daughters indoors can result in significant risk to the general public, particularly those living in homes with much higher than average concentrations. This paper reviews what is known about indoor concentrations, associated risks and the effect of measures to save energy by reducing ventilation rates, using U.S. housing as an example. It concludes that, by employing appropri...

Purpose: Radon (222Rn) and its decay products clinging to airborne particles settle in the lungs when inhaled can lead lung cancer. The main source of 222Rn is rocks soil Earth's crust causes indoor radon exposure local geological material used as a building material. Accordingly, primary objective study determine activity concentrations (CRn) exhalation rates (EA EM) from different rock types ...