
DETERMINATION OF COINCIDENCE SUMMING
CORRECTION FACTORS FOR
^{22}Na POINT SOURCE
Aleksandar Jevremović, Aleksandar Kandić, Mirjana Djurašević, Ivana Vukanac, Igor Čeliković, Zoran Milošević, Jovan Puzović
Pages: 32–35
DOI: 10.21175/RadProc.2018.07
Abstract 
References 
Full Text (PDF)
The coincidence summing effect plays an important role in HPGe spectrometry, especially at low sourcedetector distances, due to a large solid angle; therefore, the calculation of correction factors is necessary. The aim of the research described in this paper was to compare values of correction factors for a ^{22}Na point source obtained using the GESPECOR software package (MonteCarlo method) and experimentally obtained values. Measurements were performed using a semiconductor HPGe spectrometer and the point source axially positioned at nine different distances from the detector endcap. For the purpose of determining correction factors, a system of equations was formed, which, besides nuclear data as the input parameters, uses the experimentally obtained values of the total count in the entire spectrum, as well as the counts in the full energy peaks. The system of equations was solved for each particular case and correction factors were determined. By comparing the results obtained using the experimental and MonteCarlo method, it was found that the correction factors for the ^{22}Na point source have discrepancies less than 3%. The significance of these discrepancies was also verified from a statistical point of view using a Student's ttest.
 K. Debertin, U. Shotzig, “Coincidence summing corrections in Ge(Li)spectrometry at low sourcetodetector distance,” Nucl. Instrum. Meth., vol. 158, pp. 471 – 477, Jan. 1979.
DOI: 10.1016/S0029554X(79)948456  D. S. Andreev, K. I. Erokhina, V. S. Zvonov, I. Kh. Lemberg, “Consideration of cascade transitions in determining the absolute yield of gamma rays, (English translation),” Prib. Tekh. Eksp., no. 5, pp. 539 – 108, 1972.
 K. Debertin, R. G. Helmer, “Coincidencesumming corrections,” in Gamma and X ray spectrometry with Semiconductor detectors, Amsterdam, Netherlands: Elsevier Science Publishers B. V., 1988, ch. 4, sec. 4.5., pp. 258 – 269.
 T. U. Semkow, G. Mehmood, P. Parekh, M. Virgil, “Coincidence summing in gammaray spectroscopy,” Nucl. Instrum. Methods Phys. Res. A, vol. 290, no. 23, pp. 437 – 444, May 1990.
DOI: 10.1016/01689002(90)90561J  G. Anil Kumar, I. Mazumdar, D. A. Gothe, “Efficiency calibration and coincidence summing correction for large arrays of NaI(Tl) detectors in soccerball and castle geometries,“ Nucl. Instrum. Methods Phys. Res. A, vol. 611, no. 1, pp. 76 – 83, Nov. 2009.
DOI: 10.1016/j.nima.2009.09.005  O. Sima, D. Arnold, “Accurate computation of coincidence summing corrections in low level gammaray spectrometry,” Appl. Radiat. Isot., vol. 53, no. 12, pp. 51 – 56, Jul. 2000.
DOI: 10.1016/S09698043(00)001135 PMid: 10879837  D. Arnold, O. Sima, “Total versus effective total efficiency in the computation of coincidence summing corrections in gammaray spectrometry of volume sources,” J. Radional. Nucl. Ch., vol. 248, no. 2, pp. 365 – 370, 2001.
DOI: 10.1023/A:1010671823736  M. Dhibar, D. Mankad, I. Mazumdar, G. Anil Kumar, “Efficiency calibration and coincidence summing correction for a large volume (946 cm^{3}) LaBr_{3}(Ce) detector: GEANT4 simulations and experimental measurements,” Appl. Radiat. Isot., vol. 118, pp. 32 – 37, Dec. 2016.
DOI: 10.1016/j.apradiso.2016.08.013 PMid: 27587372  Tables of evaluated data and comments on evaluation, LNELNHB/CEA, Paris, France, 2009.
Retrieved from: http://www.nucleide.org/DDEP_WG/Nuclides/Na22_tables.pdf; Retrieved on: Aug. 19, 2018  S. Mangano, Mathematica Cookbook, Sebastopol (CA), USA: O’Reilly, 2010.
Retrieved from: https://math.bme.hu/~jtoth/Mma/Mathematica%20Cookbook.pdf; Retrieved on: Aug. 19, 2018  Gespecor version 4.2manual, CID Media GmbHGeweberpark, Birkenhain, Germany, 2010,
