[en] Short note

[en] The content of impurities of rare elements (REE) in ceramics La_2-xSr_xCuO_4-δ by the neutron and gamma activation analysis has been studied. The inelastic neutron scattering (INS) spectra of compounds La_2-x-yRe_ySr_xCuO_4-δ where Re is the main discovered impurity have been studied. Therefore, the crystalline electric field transitions of the impurity of magnetic rare earth ions can't be responsible for the inelastic line at e=6 MeV in the INS spectra discovered earlier. 10 refs.; 2 figs.; 2 tabs

[en] The experimental data on heavy metal and rare-earth element concentration in the environmental objects (pine needle and soil) caused by the enterprise for the production of mineral phosphoric fertilizers in Apatity (the industrial region in the Murmansk region, Kola Peninsula) have been obtained. The investigation was performed by the neutron activation analysis at the IBR-2 research reactor in the Joint Institute for Nuclear Research. The analysis of nearly 40 element distributions in pine needle and soil from different geographical sites testifies about their contamination by a spectrum of elements, including REEs. Their contamination levels in the soil in the vicinity of the enterprise are significantly high

[en] The object of this work was the study of the possibilities of neutron activation analysis (NAA) for determination of elemental content of atmospheric aerosol. On examples of three Siberian regions it was shown that methodics of analysis allow to estimate the average level of suburban background (ALSB), scale of its regional, season and annual changes. Analysis of enrichment factors allows one to convince in presence of increased content of a row of heavy metals in atmospheric air of background regions what is the consequence of a global growing of technogenic impact

[en] New experimental data have been obtained on heavy metal and rare-earth element concentrations in environmental objects, namely pine needles and soils, caused by atmospheric pollution in different regions of the Kola Peninsula. The investigation was performed with the use of epithermal neutron activation analysis at the IBR-2 fast pulsed reactor. The analysis of nearly 40 element distributions in pine needles and soils from the studied geographical points testifies of a strong contamination source - the nickel smelting complex in Monchegorsk. The contamination levels for Ni, Co, Cr, Se, and others are also high and may be hazardous for this region population because some of these elements are carcinogenic. 6 refs., 1 fig., 2 tabs

[en] Instrumental neutron activation analysis is used to determine content of 13 elements (Ca,P,Na,Mg,Fe,Sr,Br,Co,Cr,Rb,Ru,Zn,Sb) in bones of normal and hypokinetic mice. For irradiation of samples channels of IBR-2 pulsed fast reactor with thermal, resonance and fast neutron flux density 1x10¹², 0.5x10¹², 1.5x10¹²n/(cm²xs) respectively were used. Gamma-spectra were taken using gamma-spectrometer based on Ge(Li)-detector with 2.5 keV resolution with respect to ⁶⁰Co 1333 keV line and registrationefficiency of 0.6% As reference sample the Animal Bone H-5 IAEA standard was used

[en] New experimental data has been obtained on heavy metal and rare-earth element concentrations in environmental objects, namely pine needles and soils, caused by atmospheric pollution in different regions of the Kola Peninsula. The investigation was performed with the use of epithermal neutron activation analysis at the IBR-2 fast pulsed reactor. Analysis of nearly 40 element distribution in pine-needles and solids from the studied geographical points testifies of a strong contamination source-the nickel smelting complex in Monchegorsk. The contamination levels for Ni, Co, Cr, Se, and others are also high and may be hazardous to the population of this region because some of these elements are carcinogenic. (author). 6 refs., 1 fig., 2 tabs

[en] The experimental data on heavy metal and rare-earth element concentration in the environmental objects (pine needle and soil) caused by the enterprise for the production of mineral phosphoric fertilisers in Apatity (the industrial region in the Murmansk region, Kola Peninsula) have been obtained. The investigation was performed by neutron activation analysis at the IBR-2 research reactor in the Joint Institute for Nuclear Research. The analysis of nearly 40 element distributions in pine needle and soil from different geographical sites testifies about their contamination by a spectrum of elements, including REEs. Their contamination levels in the soil in the vicinity of the enterprise are significantly high. (author)

[en] The aim of present study was the multiparametric study of dangerous microelements content in the hair of children under school and primary school age which included 12 children ill with bronchial asthma and 11 control group persons in the town of Troitsk, Moscow Region. The hair specimens with weight 15-220 mg were analysed with the application of epithermal neutron activation analysis conducted at experimental installation REGATA and neutron source-unique Pulsed Fast Reactor IBR-2, with the application of combined gamma-neutron irradiation at Microtron MT-25 and with Roentgen Fluorescence Analysis device of JINR. The data of elements content in hair were obtained with solid state track detectors and semiconductor electronic spectrometers. The solid state track detectors provide the determination of U, Th, Bi and Be elements at the level of sensitivity up to 10^-8-10^-9 g/g. These data were compared with more representative information about dangerous microelements concentration obtained with NAA and RFA analyses. The obtained concentrations of most elements vary in a wide range, but in agreement with the known data. The highest degree of element dispersion was observed for U, Th, Pb, I, Br, Sb, Co, K and Be (the radiation coefficient was higher than 100-200%). The presented analysis of results shows that in the clinical picture there is some proved correlation between an increased content of some element in hair and symptoms of their accumulation in the organism of ill children, the revelation of which is the basic idea of our examination

[en] This paper considers some peculiarities of the production of phosphorus fertilizers from the point of view of the pollution of the environment with rare-earth elements. The principal possibility is demonstrated of the determination of the influence of a given type of production on the environment by measuring the change in the rare-arth elements interrelationship in the show. The main source of industrial dust is identified. The distribution of pollutants in dependence on the size of aerosol particles is given. The data on the concentrations of the pollutants in agricultural plants, employees hair and hair of local residents are also reported. 8 refs.; 4 figs.; 4 tabs