| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1879086 | Applied Radiation and Isotopes | 2012 | 5 Pages |
The effect of radon diffusion and distribution between a 226Ra matrix and the top air gap inside sample containers for gamma-ray spectrometry was studied. Containers filled at almost 100% or just 70% of total capacity yielded correction factors of about 7% and 20% respectively. Applying these correction factors allowed activity values calculated from 226Ra or radon decay products to agree within 2%.
► Secular equilibrium is required for 226Ra gamma spectrometry based on radon decay products. ► If an air gap is present, change in geometry for radon products occurs due to radon diffusion. ► A model was developed and validated to take into account this effect. ► Efficiency transfer methods were applied for sample holders filled at 100% or 70% of total capacity. ► Correction factors were about 7% and 20%.
