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1

Pomiary izotopów gamma promieniotwórczych w trynitytach

100%

Tymiński Z., Burakowska A., Tymińska K., Kołakowska E., Saganowski P., Ziemek T., Dziel T., Kotowiecki A.

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vol. 9

150-157

EN

Trynitite is a material in form of a glass created as a result of a nuclear explosion close to ground. The mechanism of its formation is similar to the formation of impact glasses and tektites, although the material usually contains trapped bubble voids, much more water and it is radioactive. High resolution non-destructive gamma spectrometry technique was used to measure rdionuclides in the chips of trinitities. The signals were detected for 137Cs, 152Eu, 226Ra, 241Am and 133Ba. The most extreme concentration was found for cesium 137Cs which the specific activity reached the level of 2317 mBq/g. Much lower values were obtained for 241Am – 722 mBq/g, 152Eu – 211 mBq/g, 226Ra – 451 mBq/g and 133Ba – 94 mBq/g.

2

Interlaboratory comparison material homogeneity testing

100%

Pantelić G. K., Todorović D. J., Nikolić J. D., Rajačić M. M.

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issue 1

EN

The homogeneity of fertilizer samples for interlaboratory γ-ray spectrometry comparison was tested by determination of the total γ count rate and the count rates for two 238U γ lines, one 40K line and one common 235U and 226Ra line. Homogeneity testing was accomplished by determination of the minimum, maximum, mean and standard deviation for each parameter and comparison of their standard deviations with predefined tolerances, by Cochran’s test, and by a one-way ANOVA. The standard deviations were all less than these tolerances. All samples passed Cochran’s test and the one-way ANOVA test for homogeneity.

3

Levels of natural radioactivity in mineral and thermal waters of Bosnia and Herzegovina

75%

Kasić A., Adrović F., Kasumović A., Hankić E.

Nukleonika

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2015

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vol. 60

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issue 3

503-508

EN

With gamma spectrometric method 23 samples of mineral and thermal waters of Bosnia and Herzegovina were analyzed. Activity concentrations of the investigated radionuclides were in the range 12–346 mBq·L−1 for 40K, 1.1–791 mBq·L−1 for 226Ra, 0.2–221 mBq·L−1 for 228Ra, 13–367 mBq·L−1 for 238U, and 0.6–17 mBq·L−1 for 235U. For all investigated radionuclides annual effective dose was estimated. The estimated total annual committed effective dose received by population as a result of ingestion of water was in the range 0.11–2.51 μSv·y−1 for thermal water and in the range 0.11–38.8 μSv·y−1 for mineral water. Measurement of activity concentrations of natural radionuclides in the examined samples was carried out with a gamma-spectrometer with high-purity germanium (HPGe) detector, having a relative efficiency of 70%.

4

Pomiary 60Co w obiektach z żelazną matrycą

75%

Tymiński Z., Dziel T., Saganowski P., Kołakowska E., Listkowska A., Tymińska K., Żołądek P., Olech A.

Acta Societatis Metheoriticae Polonorum

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2016

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vol. 7

144-150

EN

Radioactive cobalt isotope 60Co is produced in neutron activation process of stable isotope 59Co by neutron capture reaction 59Co(n,g)60Co, in solar wind charge exchange 60Ni(n,p)60Co or in spallation process 62Ni(n,p2n)60Co. These processes are responsible for isotope 60Co production either in nuclear reactor on Earth or beyond – in stars and in meteorites (induced by cosmic rays). In this work the results of 60Co measurements in metal sources by gamma spectrometry laboratory are presented. A metal reference radioactive standards made up of steel cast with discs shaped geometries and different diameters have been tested in gamma-ray spectrometry measurement system. The reference activity concentrations of 60Co were in the range of (0.291±0.010) Bq·g–1 to (1.544±0.030) Bq·g–1. The mean minimal detectable activities (MDA) obtained by series of the 6 to 18 hours lasting measurements of described above standards with HPGe detectors carried out in NCBJ OR POLATOM were in the range of 6.1 mBq·g–1 to 8.5 mBq·g–1. The results correspond to the values of 60Co activity concentration measured in the iron meteorites with young terrestrial ages.

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2 Acta Societatis Metheoriticae Polonorum

1 Nukleonika

1 Open Chemistry

1 2018

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2 2015

2 Dziel T.

2 Kołakowska E.

2 Saganowski P.

2 Tymińska K.

2 Tymiński Z.

1 Adrović F.

1 Burakowska A.

1 Hankić E.

1 Kasić A.

1 Kasumović A.

1 Kotowiecki A.

1 Listkowska A.

1 Nikolić J. D.

1 Olech A.

1 Pantelić G. K.

1 Rajačić M. M.

1 Todorović D. J.

1 Ziemek T.

1 Żołądek P.

Pomiary izotopów gamma promieniotwórczych w trynitytach

Interlaboratory comparison material homogeneity testing

Levels of natural radioactivity in mineral and thermal waters of Bosnia and Herzegovina

Pomiary 60Co w obiektach z żelazną matrycą