Temat: radioactive materials - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A modified method for the determination of radioactive isotopes in building raw and construction materials with multichannel gamma spectrometry
Autorzy:: Charewicz, W.
Żebrowski, A.
Walkowiak, W.
Borek, B.
Powiązania:: https://bibliotekanauki.pl/articles/147083.pdf
Data publikacji:: 2000
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: building materials
multichannel gamma-ray spectrometry
radioactive isotopes
Opis:: A modified method is presented for the determination of natural and artificial isotopes in building raws and materials using multichannel gamma-ray spectrometry. A procedure is given for the preparation of standards as well as for the determination of radioisotopes content in typical building raws and/or materials. Results of these determinations were compared with those from standard, tri-channel gamma spectrometry described in Instruction No. 234/95 [2] issued by the Institute of Building Technology in Warsaw, Poland.
Źródło:: Nukleonika; 2000, 45, 4; 243-247
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Review of international normatives for natural radioactivity determination in building materials
Autorzy:: Mossini, E.
Macerata, E.
Giola, M.
Mariani, M.
Powiązania:: https://bibliotekanauki.pl/articles/146119.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: acceptability
building materials
gamma spectrometry
inductively coupled plasma mass spectrometry (ICP-MS)
naturally occurring radioactive material (NORM)
Opis:: Anthropogenic activities, such as high-altitude flights and living in buildings, have enhanced the public exposure to natural radiation. In particular, 40K and radionuclides belonging to 232Th and 238U decay chains are present even in building materials, and they may be considered as partially responsible for the effective dose coming from natural radioactivity. Scientists and governments have devoted great attention to the evaluation of the effects produced on the public by naturally occurring radionuclides. In this context, to evaluate the building materials acceptability, accurate and reliable methods for the measurement of the specific activity of natural radioactive isotopes in building materials have been developed. This paper aims to provide a clear and exhaustive review on natural radionuclide measurement procedures. Several standard national normatives (Dutch NEN 5697, Italian UNI 10797, Polish ITB 455), based on gamma spectrometry, have been considered and some critical issues were identified regarding the preparation and the radiometric measuring of the samples. Therefore, the direct measurement of 238U and 232Th by ICP-MS spectrometry as well as the extrapolation of the specific activities without waiting for secular equilibrium have been considered as two promising alternative approaches.
Źródło:: Nukleonika; 2015, 60, No. 3, part 2; 597-602
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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