Temat: neutron activation analysis (NAA) - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of a neuro-fuzzy model for neutron activation analysis (NAA)Sb
Autorzy:: Khalafi, H.
Terman, M. S.
Rahmani, F.
Powiązania:: https://bibliotekanauki.pl/articles/147055.pdf
Data publikacji:: 2011
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: neural network
fuzzy logic
neutron activation analysis (NAA)
gamma-line energy
Opis:: Neutron activation analysis (NAA) is a precise chemical multielemental method of analysis which is satisfactorily used for qualitative and quantitative analyses. Repeated irradiation is needed because of mal-determination of some elements due to peak overlap in qualitative analysis. In this study, NAA procedure has been modified using a neuro-fuzzy model to avoid repeated irradiation based on multilayer perceptrons network trained by the Levenberg-Marquardt algorithm. This method increases the precision of spectrum analysis in the case of strong background and peak overlap.
Źródło:: Nukleonika; 2011, 56, 1; 17-21
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Trace analysis of Indonesian volcanic ash using thermal and epithermal neutron activation analysis
Autorzy:: Canion, B.
Jacques, C.
Landsberger, S.
Taftazani, A.
Powiązania:: https://bibliotekanauki.pl/articles/146890.pdf
Data publikacji:: 2012
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: neutron activation analysis (NAA)
trace elements
volcanic ash
rare earth elements (REE)
Mount Merapi
Opis:: There is continued great interest in determining the trace element and heavy metal content of volcanic ash for a variety of reasons. The motivation stems from the desire to understand the geochemistry of volcanic ash in imbedded geological formations, the impact on seawater, and the possible release of toxic elements into the environment that may impact livestock grazing and water systems. Ash from volcanic plumes can go as high 8-18 km thus affecting climate and air traffic. We have employed Compton suppression neutron activation analysis (NAA) with thermal and epithermal neutrons to determine trace elements in volcanic ash from Indonesian eruption of Mount Merapi in October 2010. We found a wide range of elements, including several rare earth elements.
Źródło:: Nukleonika; 2012, 57, 4; 585-589
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Instrumental neutron activation analysis (INAA) for steel analysis and certification
Autorzy:: Polkowska-Motrenko, H.
Chajduk, E.
Danko, B.
Powiązania:: https://bibliotekanauki.pl/articles/147648.pdf
Data publikacji:: 2011
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: steel analysis
neutron activation analysis (NAA)
proficiency testing/interlaboratory comparison (PT/ILC)
certification of steel reference materials
Opis:: Instrumental neutron activation analysis (INAA) procedure of elemental steel analysis has been elaborated. The reliability of results obtained by the described procedure has been proved in the frame of different proficiency testing/interlaboratory comparison (PT/ILC) programmes, in which the Institute of Nuclear Chemistry and Technology (INCT, Warsaw) took part since 2005. This work summarizes participation of INCT in these exercises and demonstrates the usefulness of INAA to the certification of steel reference materials.
Źródło:: Nukleonika; 2011, 56, 4; 311-315
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

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