NDLI: Application of INAA for investigation of magnesium and aluminium oxide materials

Content Provider	Springer Nature Link
Author	Riekstina, Daina Skvortsova, Vera Veveris, Olgerts
Copyright Year	2013
Abstract	The paper presents investigations of changes in optical absorption and photo luminescence spectra of magnesium oxide, and natural and synthetic magnesium aluminium spinel related with the content of transition metal ions (Cr, Fe, Mn) and the irradiation with fast neutrons. Six synthetic single magnesium aluminium spinel crystals with different stoichiometry (MgO·nAl$_{2}$O$_{3}$), five natural crystals from Ural and Pamir deposits, and seven MgO crystals were studied. Micro impurities (Cr, Fe, and Mn) and macro component (Mg, Al) quantities have been determined using the instrumental neutron activation analysis technique. Concentrations of impurities in different spinels were found in following ranges: for Cr—1 × 10$^{−4}$ to 8 × 10$^{−2}$ %, for Mn—2 × 10$^{−5}$ to 23 %, for Fe—1 × 10$^{−4}$ to 1.2 %. Three ranges of luminescence: 380–460, 650–850 and 850–1,050 nm, were established in the most part of the investigated MgO samples. Analysis shows that the intensity of emission in each of these regions is strongly dependent on the concentration of transition metal ions. Great deviation from the stoichiometry of the irradiated MgO·2.8Al$_{2}$O$_{3}$ crystal leads to the local structure of α-Al$_{2}$O$_{3}$ formation around Cr$^{3+}$ ions. The orange emission is attributed to Mn$^{2+}$ in octahedral coordination, it can be assumed that the band at 570 nm is belonging to the complex centre “Mn$^{2+}$–F$^{+}$ (or F centre)”.
Starting Page	1907
Ending Page	1911
Page Count	5
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	298
Issue Number	3
e-ISSN	15882780
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-10-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	INAA Transition metal impurities Magnesium oxide Magnesium aluminum spinel Optical properties Nuclear Chemistry Physical Chemistry Nuclear Physics, Heavy Ions, Hadrons Diagnostic Radiology Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

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