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Raporty IFJ PAN (IFJ PAN Reports)

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Browsing by Author "Bilski, Paweł"

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    Dosimetric properties of the TLD European Cards with high sensitive MCP-7 (7LiF:Mg,Cu,P) thermoluminescence detectors for personal dosimetry
    (Institute of Nuclear Physics Polish Academy of Sciences, 2005) Bilski, Paweł; Budzanowski, Maciej
    Dosimetric properties of Harshaw compatible cards equipped with two thermoluminescence MCP-7 (LiF:Mg,Cu,P) detectors were investigated at the accredited Laboratory of Individual and Environmental Dosimetry (Polish acronym LADIS) at the Institute of Nuclear Physics, Krakow. Dose detection threshold, dose sensitivity, dose linearity, residual signal, fading, sensitivity to thermal neutrons, sensitivity to ambient light, and the influence of environmental conditions were evaluated. All investigated dosimetric properties were found to be within the limits defined by IEC document 1066 “Thermoluminescence Dosimetry Systems for Personal and Environmental Standard”.
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    Results obtained with the passive radiation detectors in the ICCHIBAN-4 experiment
    (Institute of Nuclear Physics Polish Academy of Sciences, 2005) Bilski, Paweł; Horwacik, Tomasz
    In frame of the InterComparison of Cosmic rays with Heavy Ions Beams at NIRS (ICCHIBAN) organized at the HIMAC accelerator in Chiba several types of the thermoluminescent detectors (TLD), as well as CR-39 track detectors, were exposed. Four different types of TLDs were used: MTS-7 (7LiF:Mg,Ti), MTS-6 (6LiF:Mg,Ti), MCP-7 (7LiF:Mg,Cu,P) and MTT-7 (7LiF:Mg,Ti with changed activator composition. All TLDs were manufactured at the Institute of Nuclear Physics (IFJ) in Krakow. The detectors were irradiated with various doses of He, C, Ne and Fe ions. Part of exposures were done in unknown conditions, to test measuring capabilities of the detectors. For analyses of these results, the method of obtaining information on ionisation density of an unknown radiation field, which is based on ratios of responses of different LiF detectors, was successfully used.
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    The thermoluminescence glow-curve analysis using GlowFit - the new powerful tool for deconvolution
    (Institute of Nuclear Physics Polish Academy of Sciences, 2005) Bilski, Paweł; Puchalska, Monika
    A new computer program, GlowFit, for deconvoluting first-order kinetics thermoluminescence (TL) glow-curves has been developed. A non-linear function describing a single glow-peak is fitted to experimental points using the least squares Levenberg- Marquardt method. The main advantage of GlowFit is in its ability to resolve complex TL glow-curves consisting of strongly overlapping peaks, such as those observed in heavilydoped LiF:Mg,Ti (MTT) detectors. This resolution is achieved mainly by setting constraints or by fixing selected parameters. The initial values of the fitted parameters are placed in the so-called pattern files. GlowFit is a Microsoft Windows-operated user-friendly program. Its graphic interface enables easy intuitive manipulation of glow-peaks, at the initial stage (parameter initialization) and at the final stage (manual adjustment) of fitting peak parameters to the glow-curves. The program is freely downloadable from the web site www.ifj.edu.pl/dept/no5/nz58/deconvolution.htm