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Browsing by Author "Cywicka-Jakiel, Teresa"

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    Budowa modeli geochemiczno-mineralogicznych na podstawie danych uzyskiwanych z zaawansowanych metod geofizyki jądrowej. Część 1
    (Institute of Nuclear Physics Polish Academy of Sciences, 2007) Woźnicka, Urszula; Cywicka-Jakiel, Teresa; Drabina, Andrzej; Dworak, Dominik; Tracz, Grzegorz; Drozdowicz, Krzysztof; Zorski, Tomasz; Ossowski, Andrzej; Środoń, Jan; Kawiak, Tadeusz; Bakowska, Dorota; Zielińska, Małgorzata; Zalewska, Jadwiga
    An extensive set of conventional and special core analysis measurements, complemented by additional chemical and mineralogical analyses was performed, forming the basis for the evaluation of the complex thin bedded gas-bearing shaly-sand formations of Miocene age in the Carpathian Foredeep region of Southern Poland. Mineralogy was established by using full elemental composition, XRD method, total surface area and cation exchange capacity (CEC). The analysis showed that the most important clay component is illite – smectite mixed layer. Statistical multivariate analysis of all data helped to set up a comprehensive general petrophysical model. For the notoriously difficult CEC information for the rock matrix we could establish a reliable correlation (corr. coefficient r2 around 0.95) between thermal neutron absorption cross section SIGMA and total natural radioactivity GR with CEC, with boron and rare earth elements the two most important SIGMA contributors in the rock matrix. This good correlation permits a continuous on-line CEC determination and therefore a reliable application of the Waxman-Smits water saturation model to properly take into account the clay mineral effects in evaluating water saturation.
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    Eksploatacja stanowiska r adioterapi i protonow ej nowotworów oka w IFJ PAN w latach 2013-2015
    (Institute of Nuclear Physics Polish Academy of Sciences, 2015) Horwacik, Tomasz; Michalec, Barbara; Cygan-Bakoniak, Marzena; Cywicka-Jakiel, Teresa; Czaderna, Anna; Durlak, Edyta; Góra, Łukasz; Grzanka, Leszek; Kajdrowicz, Tomasz; Kędzierska, Dominika; Kos, Robret; Kozera, Anna; Krempa, Aleksander; Krempa, Artur; Lipeńska, Irena; Liszka, Małgorzata; Malinowski, Leszek; Mierzwińska, Gabriela; Nowak, Tomasz; Ogrodowicz, Ewa; Pędracka, Anna; Ptaszkiewicz, Marta; Rogóż-Duda, Agnieszka; Rydygier, Marzena; Sadowski, Bartłomiej; Skowrońska, Katarzyna; Stolarczyk, Liliana; Sowa, Urszula; Swakoń, Jan; Waligórski, Michael; Olko, Paweł
    Proton radiotherapy is an effective treatment modality for ocular cancer patients with choroidal melanoma. In 2011 a proton radiotherapy facility at the Institute of Nuclear Physics Polish Academy of Sciences was commissioned and went into clinical operation. By the end of the year 2015, a total of 128 ocular patients of the University Hospital in Kraków were irradiated at this facility, of whom 113 were treated under contract from the National Health Fund.
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    Monte Carlo simulation of the upgraded, neutron - gamma logging tool, SO-5-90-SN type. Comparison of the simulations and measurements
    (Institute of Nuclear Physics Polish Academy of Sciences, 2005) Cywicka-Jakiel, Teresa; Zorski, Tomasz
    For gas prospecting in the shaly-sand Miocene formations of the Carpathian Foredeep many complementary geophysical techniques are being used. The spectrometric Neutron-Gamma well Logging (sNGL) is one of the nuclear techniques being useful for the formation mineralogy identification. The results of the real and simulated sNGL experiments are compared in this report. These benchmark experiments were performed for determination of the main rock constituents: Si, Ca, Fe and H in the rock models which belong to the Polish calibration station in Zielona Góra (BGW). The upgraded n-gamma spectrometer, SO-5-90-SN type, has been applied in the measurements and was simulated using the Monte Carlo code (MCNP). The results of the real and simulated sNGL experiments are in good conformity. The H, Ca and Fe concentrations obtained from the simulations (“MCNP”) have been highly correlated with their reference (“chem”) concentrations. Squares of the correlation coefficients (R2) amount to 0.931, 0.969, 0.973, respectively. For the Si concentration (CSi), dependence CSiMCNP(CSichem) shows slightly lower R2 (0.972) than for dependence CSimeas(CSichem). This is mainly attributed to the unavailable B, Cl and Rare Earth Elements (REE) contents, of the BGW Zielona Góra rock models and to their geological inhomogeneities. Additional improvement of correlation between results of both experiments is also presented. It has been obtained when data from preliminary analyses for B, Cl and (REE) of two rock models were included in the simulations. The Fe concentration can be used as one of the indicators of the formation clay content, therefore an accurate quantification of this element in the rocks is of high importance. The BGW calibration station in Zielona Góra has limited number of the rock models, and Fe content is poorly diversified in them. Therefore the artificial rocks of different Fe contents have been simulated and spectrometer sensitivity, to the changes of the Fe contents, has been estimated.
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    Monte Carlo Simulations of the Spectrometric n-Gamma Well Logging. Comparison of Simulations and Measurements for the SO-5-90 Logging Tool
    (Institute of Nuclear Physics Polish Academy of Sciences, 2004) Cywicka-Jakiel, Teresa; Zorski, Tomasz
    The results of the Monte Carlo simulations (MCNP code) of the spectrometric neutron-gamma well logging (sNGL) are presented. The sNGL can be very useful for the precise lithology determination, what is especially important for oil and gas prospecting in shally–sand formations. Possibility of determination of the Si, Ca and Fe content in rocks by means of the analysis of gamma ray spectra induced by the captured neutrons is well known for 40 years at least [Larionov, 1969]. Preliminary sNGL experiments performed at the Polish Calibration Station in Zielona Góra, using a simple borehole spectrometer equipped with the isotopic Am-Be neutron source and the BGO detector, fully confirmed this possibility. MCNP simulations of the sNGL experiments have been done for the SO-5-90 neutron-gamma spectrometer and for the lithology models (standards) of the Calibration Station. The concentrations of H, Si, Ca and Fe in these models have been determined from the real and simulated experiments using the simulated (“MCNP”) and measured (“meas”) spectra of gamma-rays from neutron interactions with the rock nuclei. The H, Si and Ca concentrations obtained from the simulated experiment are well correlated with their reference values, known from the chemical (“chem”) analyses - regarded as true values. Squares of the correlation coefficients (R2) amount to 0.992, 0.988 and 0.984, respectively. For Fe, a lower R2 has occurred for the linear dependence FeMCNP(Fechem) than for Femeas(Fechem) amounting to 0.834 and 0.923 respectively. Although the established correlations between results of the real and simulated sNGL experiments show the high values of correlation coefficients, the noticeable improvement of these correlations is expected for the fully verified chemical composition of the Zielona Góra standards and for improved parameters of the n-gamma spectrometer. The usefulness of the MCNP code for modeling the spectrometric neutron-gamma logging tool responses is confirmed. The possibility of the fast and accurate computer simulations opens a new field for development of the spectrometric n-gamma logging. Especially the influence of such disturbing factors as borehole conditions, borehole and formation salinities or presence of the additional rock elements (like B, S, K, Gd ) must be precisely known when the quantitative determination of Si, Ca and Fe is required.