GESPECOR: A versatile tool in gamma-ray spectrometry
ABSTRACT Abstract GESPECOR is a Monte Carlo based software developed for the computation of efficiency, of matrix effects and of coincidence summing effects in gamma-ray spectrometry. GESPECOR can be applied to coaxial and well-type HPGe or to Ge(Li) detectors and to various types of sources, including point, cylindrical, and spherical sources or Marinelli beakers. In this paper the structure of GESPECOR is presented and the procedures applied are described. The uncertainty of the results computed by GESPECOR is carefully analyzed. The analysis shows that GESPECOR is able to provide results with a well defined uncertainty, in a user friendly WINDOWS environment.
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ABSTRACT: Laboratory analysis were performed for radiological characterization of the underground pipes connecting the 30 m(3) buffer tank of liquid effluents belonging to the Nuclear Reactor VVR-S to the 300 m(3) tanks from the IFIN-HH Radioactive Waste Treatment Station. Measurements for the assessment of the contaminants inside of the pipelines were done using high resolution gamma-ray spectrometry, with the detector placed inside of the pipe. Due to the specific measurement geometry, experimental efficiency calibration was not possible; therefore the peak efficiency curve was obtained by Monte Carlo simulation using GESPECOR software.Romanian Journal of Physics 12/2014; 59(9-10):1043-1047. · 0.75 Impact Factor
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ABSTRACT: The nuclear accident of Fukushima Dai-ichi (Japan) which occurred after the tsunami that impacted the northeast coasts of Japan on March 11th, 2011 led to significant releases of radionuclides into the atmosphere and resulted in the detection of those radionuclides at a global scale. In order to track airborne radionuclides from the damaged reactors and to survey their potential impact on the French territory, the French Institute of Radiation Protection and Nuclear Safety (Institut de Radioprotection et de Sureté Nucléaire IRSN) set up an enhanced surveillance system to give quick results as needed and later give quality trace level measurements. Radionuclides usually measured at trace levels such as (137)Cs and in a very sporadic way (131)I were reported. Radionuclides that we had never measured in air since the Chernobyl accident: (134)Cs, (136)Cs, the mother/daughter pairs (129m)Te-(129)Te and (132)Te-(132)I, and (140)La (from the mother-daughter pair (140)Ba- (140)La) were also reported. Except the (131)I/(137)Cs ratio, activity concentration ratios were constant. These ratios could be used to help source term assessment, or as data for transfer studies realized after the passage of contaminated air masses, typically using the (134)Cs/(137)Cs ratio.Journal of Environmental Radioactivity 03/2013; DOI:10.1016/j.jenvrad.2013.02.014 · 3.57 Impact Factor
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ABSTRACT: 1 , O. SIMA 2 Abstract. In order to perform an efficiency calibration for different measurement geometries a good knowledge of the detector characteristics is required. The Monte Carlo simulation program GESPECOR is used. The detector characterization required for Monte Carlo simulation is achieved by a trial and error procedure using the e fficiency v alues measured with point sources placed in several positions.