Coincidence summing corrections in HPGe gamma-ray spectrometry for Marinelli-beakers geometry using peak to total (P/T) calibration

Abstract

Peak-to-total (P/T) calibration Gamma ray spectrometry Gennie 2000 a b s t r a c tThe coincidence summing corrections for an HPGe spectrometer with Marinelli-beaker geometry were calculated using the peak-to-total (P/T) calibration method in combination with the algorithms implemented in the Genie 2000 software. The P/T ratios were calculated for different energies and three types of beaker contents: air, powder milk and soil. The validity of the correction was tested against a standard sample and showed excellent agreement with the certified data. The corrections were also in good agreement with published data in the literature.

Precision measurement of radioactivity in gamma-rays spectrometry using two HPGe detectors (BEGe-6530 and GC0818-7600SL models) comparison techniques: Application to the soil measurement

“…The sources were placed surrounding the germanium detector with the radionuclides dispersed in gel matrices within planar beakers of geometries identical to that of the evaluated samples. The calibration spectra were also acquired for 7200 s (2 h) [5], [8], [9].…”

Evaluation of the cause of unexplained radiocaesium contamination of brown rice in Fukushima in 2013 using autoradiography and gamma-ray spectrometry

“…The self-absorption of gamma-rays was adequately corrected based on the thickness and density of the sample and the attenuation coefficients of gamma-rays. Furthermore, the coincidence-summing correction of gamma-rays emitted from 134 Cs was performed using the peak-to-total calibration method14. The radionuclide concentrations in the samples were time-corrected to the values on 1 October of each year, the conventional harvest time for rice in Fukushima, by each radioactive half-life.…”

Calculation of self-absorption and coincidence summing correction factors for the extended sources using GEANT4

“…The importance of such MC methods is that they enable one to quickly calculate a new efficiency value for changes in the measuring conditions. Different theoretical and MC approaches were used to calculate the full energy peak efficiency value including the effect of source self-absorption (Hardy et al, 2002;Vargas et al, 2002;Mostajaboddavati et al, 2006;Abbas, 2007;Khater and Ebaid, 2008;Badawi et al, 2012;Ababneh and Eyadeh, 2015). However, these methods required approximations and simplifications in the internal structure of the Ge crystal and source-detector geometries calculations (Shizuma et al, 2016).…”

“…Abbas et al (2001) used the analytical approach to calculate the correction factor with total efficiency. Most of the authors used total efficiencies in the simulation for the calculation of coincidence summing correction factor (Wang et al, 2002;Vidmar et al, 2007;Ababneh and Eyadeh, 2015), and in recent years some authors used GEANT4 code and obtained good agreement with experimental results (Quintana and Montes, 2014;Giubrone et al, 2016). But these approaches required elaborate work in its implementation, especially for the close geometry measurements and large volume samples (Lee et al, 2008).…”