A new method to determine emanation coefficient of 222Rn and 220Rn from soil samples is presented. The aim of the present work is to obtain a useful, rapid and noise free method to make soil sample measurements. The method is based on the measurements of specific activities of 220Rn and 222Rn in a sealed chamber using α-spectrometry and on the measurements of specific activities of 232Th and 226Ra using γ-spectrometry. The specific activities of radon isotopes are measured using the electrostatic collection of polonium isotopes on the silicon surface barrier detector mounted at the top of a chamber containing the soil sample. In the chamber volume, the process of balance has been studied and the results show that the time needed to achieve the equilibrium is shorter than in the presence of free exhalation. © 1997 Published by Elsevier Science Ltd.
A method for emanation coefficient measurements of 222Rn and 220Rn from soils
Sabbarese C.
1997
Abstract
A new method to determine emanation coefficient of 222Rn and 220Rn from soil samples is presented. The aim of the present work is to obtain a useful, rapid and noise free method to make soil sample measurements. The method is based on the measurements of specific activities of 220Rn and 222Rn in a sealed chamber using α-spectrometry and on the measurements of specific activities of 232Th and 226Ra using γ-spectrometry. The specific activities of radon isotopes are measured using the electrostatic collection of polonium isotopes on the silicon surface barrier detector mounted at the top of a chamber containing the soil sample. In the chamber volume, the process of balance has been studied and the results show that the time needed to achieve the equilibrium is shorter than in the presence of free exhalation. © 1997 Published by Elsevier Science Ltd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
