Influence of the Distribution of 222Rn Concentration Under the Ground on Natural Gamma-ray Flux Density and Exposure Rate
- 1 November 1979
- journal article
- research article
- Published by Wolters Kluwer Health in Health Physics
- Vol. 37 (5) , 669-675
- https://doi.org/10.1097/00004032-197911000-00004
Abstract
Analytical formulas are derived for uncolloid .gamma.-ray flux density and exposure rate above the ground due to 222Rn distributed in the soil exponentially with depth. A Monte-Carlo method is applied to collided .gamma.-rays. The flux density and exposure rate are strongly affected by the escape to production ratio and diffusion coefficient of 222Rn in the soil. These calculations are applied to natural radionuclides in the soil of the campus of Nagoya University [Japan]. The difference between the total exposure rate on the campus calculated by assuming exponential distribution of 222Rn in the soil and by assuming uniform distribution ranges from 3-8%.This publication has 0 references indexed in Scilit: