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[en] New data of the U-Pb dating of zircons of magmatic and metamorphic complexes of the Baikal-Patomskoe Upland are presented. More than 40 uranium-lead data were analyzed. The results obtained permit to conclude that the region has a polycyclic development. Main geochronological stages of the magmatic and metamorphic events were established. Lower Proterovic substrate age is found to be 2114+-22 millions of years. Late Kerelian (Akithan) stage (1800-1860 millions of years) are revealed as well as Early Paleo oic (556-420 millions of years) and Hercynian (340-270 millions of years). Violations in the zircon radiological systems are in the range of 473+-23 million of years. Geochronological gap (window) was found to bt in the limits of 1800-1300 millions of years
Journal
[en] Scintillation ceramics of calcium fluoride doped by two-valent europium ions is produced. Properties of this ceramics are studied. It is shown that it may be applied for α-, β- and low-energy (up to 100 kev) γ-radiation detection under the radiation monitoring of the emvironment and food stuff, in medical diagnostics, in nuclear physics devices etc
Journal
[en] Results of spectrometric and background investigations into plastic scintillators (PS) on the basis of polystyrene and polymethylmetacrylate are presented. Analysis of the effects of reflection conditions on the PS surface on resolution is given, the proper resolution functional dependences revealed are presented. Experimental results are compared to the calculated ones, obtained using mathematical modelling methods. PS background characteristics are determined at Eγ=0.1-3.0 MeV under passive protection conditions. The presense of uranium-radium and thorium series element radionuclide background radiation in PS is shown. At Eγ>1 MeV the proper PS emission is lower than in NaI(Tl)-base detectors
Journal
[en] The authors measured the energy resolution for a linear dependence of light yield on gamma radiation energy of gamma spectrometers based on plastic scintillation detectors for several plastic scintillators. If there were several gamma lines from the source the line with the highest energy was used to eliminate distortion due to overlap from the Compton background from gamma radiation of higher energy. Attenuation lengths were calculated. The tests were based on three modes of interaction between the gamma radiation and the scintillator: Compton scattering, the photoelectric effect, and pair formation. The contribution from light collection was also considered. The scintillators tested included polystyrene, polymethyl methacrylate, cesium iodide, and sodium iodide. Gamma sources included cesium 137, sodium 22, potassium 40, yttrium 88, thorium 232, and plutonium-beryllium
Journal
[en] Scintillation characteristics have been studied for detectors of charged particles and low-energy gamma-quanta produced on the basis of Ticor single crystals
Journal
Voprosy Atomnoj Nauki i Tekhniki. Yaderno-fizicheskie issledovaniya; ISSN 1562-6016; 
; (no.2,43); p. 167-168
; (no.2,43); p. 167-168
No abstract available
Source
Nitsch, K.; Rodova, M. (eds.); Institute of Physics, Academy of Sciences of the Czech Republic, Prague (Czech Republic); Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering, Prague (Czech Republic). Funding organisation: European Commission, Brussels (Belgium); Committee for Collaboration of the Czech Republic with CERN, Prague (Czech Republic); Crytur Ltd, Turnov (Czech Republic); [261 p.]; ISBN 80-09025779-1; ; 2003; p. 41; LUMDETR: 5. European conference on luminescent detectors and transformers of ionizing radiation; Prague (Czech Republic); 1-5 Sep 2003; Abstract of oral contribution We-O23; 2 refs.
; 2003; p. 41; LUMDETR: 5. European conference on luminescent detectors and transformers of ionizing radiation; Prague (Czech Republic); 1-5 Sep 2003; Abstract of oral contribution We-O23; 2 refs.
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