Abstract
A car-borne NaI(TI) spectrometric system was used together with a Cs-137 source to obtain realistic data in the search for unshielded and semi-shielded orphan sources. The potassium-stripped counts (PSC) method was used to estimate the influence by the shielding on the detection ability. A reduction of about 5% in the critical distance was obtained for the semi-shielded source. A curve fitting method was also developed and evaluated. Results from the curve fitting method showed inferior ability to find the source compared to the PSC method. However, it can be a useful complementary tool, for characterisation of the source shielding, and estimation of the distance from the road. (c) 2005 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 551-555 |
| Journal | Applied Radiation and Isotopes |
| Volume | 64 |
| Issue number | Dec 29 |
| DOIs | |
| Publication status | Published - 2006 |
Subject classification (UKÄ)
- Radiology and Medical Imaging
Free keywords
- radioactive source search
- mobile gamma spectrometry
- orphan sources