Abstract
It was found that the activity and the position of a radioactive point source (hot spot) in a large box containing low absorbing material can be measured accurately using two NaI(Tl) gamma-ray detectors at the opposite sides of the box i.e. at 180° one to another. The harmonic mean of the count rates square roots measured with the two detectors was found to be independent of the hot spot position and depends only on the source activity, the box size and the gamma-rays energy. The activity of the radioactive point source can be calculated from the above-mentioned mean. The position of the point source can be calculated from the ratio of the two detectors count rates.
Original language | English |
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Pages (from-to) | 314-325 |
Number of pages | 12 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 491 |
Issue number | 1-2 |
DOIs | |
State | Published - 21 Sep 2002 |
Keywords
- A source in a box
- Unknown radioactive sources
- Virtual point detectors
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation