Ozgumus, A. and Barillon, R. and Chambaudet, A. (1999) Radon emanation coefficient study of a geological sample. Il nuovo cimento C, 22 C (34). pp. 301308. ISSN 18269885

Text
ncc7922.pdf  Published Version Download (85kB)  Preview 
Abstract
The radon atom can escape from the material it was formed in by direct recoil or by diffusion. It then enters either an inter or intragranular space. Next, the radon atom can migrate by diffusion or convection in order to reach the atmosphere. The emanation coefficient is defined as the ratio between the number of radon atoms that escape from the matrix and the total number produced in the entire material. We propose to define a protocol in order to measure this emanation coefficient by a differential gammametric method. This method consists in determining the concentration of the short, halflife progenies of radon (essentially lead214 and bismuth214) through measuring their gammaray intensities in a hermetic cell before and after radioactive equilibrium. The first gamma measurement results give us the quantity of radon trapped in the solid matrix. A second analysis, after 13 days, gives the total production of the progenies, and thus the total radon in the sample. The measurements of a sample that is both dried and saturated are necessary to estimate the radon emanation potential. The influence of the fluid in the porous space is discussed in a theoretical way. This approach is applied to a geological sample and compared with the experimental results.
Item Type:  Article 

Additional Information:  Paper presented at the “Fourth International Conference on Rare Gas Geochemistry”, Rome, October 810, 1997. 
Uncontrolled Keywords:  Geophysical aspects of geology, mineralogy, and petrology; viscosity, diffusion, and thermal conductivity; conference proceedings 
Subjects:  500 Scienze naturali e Matematica > 550 Scienze della Terra 
Depositing User:  Marina Spanti 
Date Deposited:  10 Oct 2019 07:00 
Last Modified:  10 Oct 2019 07:00 
URI:  http://eprints.bice.rm.cnr.it/id/eprint/13278 
Actions (login required)
View Item 