Projects / Programmes
Development and implementation of new analisis methods in gamma-ray spectrometry
| Code |
Science |
Field |
Subfield |
| 1.02.00 |
Natural sciences and mathematics |
Physics |
|
| Code |
Science |
Field |
| P180 |
Natural sciences and mathematics |
Metrology, physical instrumentation |
Gamma-ray spectrometry, detector calibration, measurement analysis, measurements in accidental conditions
Researchers (3)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
02586 |
PhD Matjaž Aleš Korun |
Physics |
Head |
2004 - 2007 |
277 |
| 2. |
15721 |
PhD Tim Vidmar |
Physics |
Researcher |
2004 - 2007 |
152 |
| 3. |
11774 |
MSc Branko Vodenik |
Physics |
Researcher |
2004 - 2007 |
205 |
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
91,408 |
Abstract
The reliability of measurement of gamma- and X-ray emitters by gamma-ray spectrometry is a prerequisite for performing the control of the contamination of the working and living environment with radioactive substances reliably. The reliability of the measurements can be increased by the introduction of automatized metrologically supported measurement and analysis methods in the detector calibration, measurements and spectra analysis.
Detectors are calibrated by measuring the spatial dependence of the detector response to point sources on a grid of points covering the space vhere the sample is placed during the measuremant. To simplify the calibration procedure a combined method will be developed where the most to the measurements on the grid of points will be substituted by calculations by the Monte-Carlo method using the model of the detector.
The activity calculation of isotopes exhibiting elaborate decay schemes will be improved by the introduction of a new method taking into account up to twenty excited states in the decaying nucleus. In the method the integration of the coincidence matrix over the sample volume will be used.
The reliability of the peak analysis will be improved by the introduction of new analyzing programs. Such an extension offers the opportunity for detection of poor results in the automatic spectrum analysis by comparing the results obtained by different programs. It is important that programs with different peak analyzing algorithms are used since in this case the mutual independence of the results of these alyses is achieved. A new peak analysis program using the method of optimal filtering is being developed. The analysis will also be expanded by the introduction of a new program for the analysis of multiplets.
The analysis methods developed will be implemenyed in the development of new automatic software fo use in accidental conditions. In such conditions the reliability of analysis results is especially important since they are by decision makers managing the accident. The mobile laboratories performing the measurements must be therefore equipped with robust and reliable software, which is easy to use. The experience with the Mobile Unit of the Ecological Laboratory enable us to develop such a software. This development is justified by the fact that there are no adequate products on the market.
