Nuclear Engineering and Technology

  • 제35권3호
  • /
  • Pages.234-242
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  • 2003
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지

Experimental and Simulated Efficiency of a HPGe Detector in the Energy Range of $0.06{\sim}11$ MeV

  • 발행 : 2003.06.01
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초록

The full energy peak efficiency of a hyper pure germanium (HPGe) detector was calibrated in a wide energy range from 0.06 to 11 MeV. Both the experimental technique and the Monte Carlo method were used for the efficiency calibration. The measurement was performed using the standard radioisotopes in the low energy region of $60{\sim}1408$ keV, which was further extended up to 11 MeV by using the $^{14}N(n,r)\;and\;^{35}Cl(n,r)$ reactions. The GEANT Monte Carlo code was used for efficiency calculation. The calculated efficiency had the same dependency on the r-ray energy with the measurement, and the discrepancy between the calculation and the measurement was minimized by fine-tuning of the detector geometry. From the calculated result, the efficiency curve of the HPGe detector was reliably determined particularly in the high energy region above several MeV, where the number of measured efficiency points is relatively small despite the wide energy region. The calculated efficiency agreed with the measurement within about $7\%$. In addition to the efficiency calculation, the origin of the local minimum near 600 keV on the efficiency curve was analyzed as a general characteristics of a HPGe detector.

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참고문헌

  1. K. Derbertin and R.G. Helmer, Gamma-and X-ray Spectrometry with Semiconductor Detectors, pp. 205-244, North-HolIand, Amsterdam (1988)
  2. Z. Kis, B. Fazekas, J. Ostor, Zs. Revay, T. Belgya, G.L. Molar and L. Koltay, 'Comparison of efficiency functions for Gegamma-ray detectors in a wide energy range', Nucl. Instr. and Meth. A 418, 374 (1998) https://doi.org/10.1016/S0168-9002(98)00778-5
  3. S. Raman, C. Yonezawa, H. Matsue, H. Iimura and N. Shinohara, 'Efficiency calibration of a Ge detector in the 0.1-11.0 MeV region', Nucl. Instr. and Meth. A 454, 389 (2000) https://doi.org/10.1016/S0168-9002(00)00493-9
  4. G.L. Molnar, Zs. Revay and T. Belgya, 'Wide energy range efficiency calibration method for Ge detectors', Nucl. Instr. Meth. A 489, 140 (2002) https://doi.org/10.1016/S0168-9002(02)00902-6
  5. K. Derbertin and R.G. Helmer, Gamma- and X-ray Spectrometry with Semiconductor Detectors, p. 221, North-Holland, Amsterdam (1988)
  6. H. Seyfarth, A.M. Hassan, B. Hrastnik, P. Gottel and W. Delang, 'Efficiency determination for some standard type Ge(Li) detectors for gamma-rays in the energy range from 0.04 to 11 MeV', Nucl. Instr. Meth. 105, 301 (l972)
  7. Y. Shigetome and H. Harada, 'Development of twin Ge detector and its performance', Nucl. Instr. and Meth. A 469, 185 (2001) https://doi.org/10.1016/S0168-9002(01)00765-3
  8. S.H. Byun, G.M. Sun and H.D. Choi, 'Development of a prompt gamma activation analysis facility using diffracted polychromatic neutron beam', Nucl. Instr. and Meth. A 487, 521 (2002) https://doi.org/10.1016/S0168-9002(02)00394-7
  9. G.M. Sun, C.S. Park and H.D. Choi, 'lmprovement of the Gamma-ray Spectrometer of SNU-KAERI PGAA FaciIity', Proceedings of the Korean Nuclear Society Autumn Meeting, Yongpyong, Korea, (2002) (in Korean)
  10. R.B. Firestone, Lawrence Berkeley National Laboratory, USA, private communication
  11. G.W. Phillips and K.W. Marlow, 'Program HYPERMET for Automatic Analysis of Gamma-Ray Spectra from Germanium Detectors', NRL Memorandum Report 3198, Naval Research Laboratory (1976)
  12. GEANT - Detector Description and Simulation Tool, Application Software Group, Computing and Network Division, CERN, Geneva, Switzerland, http://wwwinfo.cern.ch/asd/geant4/geant4.html
  13. M. Korun, A. Likar and T. Vidmar, 'Monte-Carlo calculation of the spatial dependence of the coaxial HPGe detector efficiency for point sources', Nucl. Instr. and Meth. A 390, 203 (1997) https://doi.org/10.1016/S0168-9002(97)00378-1
  14. S. Ashrafi, A. Likar and T. Vidmar, 'Precise modeling of a coaxial HPGe detector', Nucl. Instr. and Meth. A 438, 421 (1999) https://doi.org/10.1016/S0168-9002(99)00862-1
  15. M. Korun and T. Vidmar, 'Monte Carlo calculations of the total-to-peak ratio in gamma-ray spectrometry', Appl. Radiat. Isot. 52, 785 (2000) https://doi.org/10.1016/S0969-8043(99)00245-6
  16. J.-M. Laborie, G.Le Petit, D. Abt and M. Girard, 'Monte Carlo calculation of the efficiency calibration curve and coincidence-summing corrections in low-level gamma-ray spectrometry using well-type HPGe detectors', Appl. Radiat. Isot. 53, 57 (2000) https://doi.org/10.1016/S0969-8043(00)00114-7
  17. D. Karamanis, V. Lacoste, S. Andriamonje, G. Barreau and M. Petit, 'Experimental and simulated efficiency of a HPGe detector with point-like and extended sources', Nucl. Instr. and Meth. A 487, 477 (2002) https://doi.org/10.1016/S0168-9002(02)00393-5
  18. C.S. Kim, G.M. Sun, J.Y. Lee, S.H. Byun, M.S. Kim, Y.D. Bae and H.D. Choi, 'Measurement of the HPGe Detector Efficiencies for $gamma$-rays and a Comparison with Monte Carlo Calculations', Sae Mulli 37, 399 (1997) (in Korean)
  19. C.S. Park, G.M. Sun, S.H. Byun and H.D. Choi, 'Calculation of Efficiency for HPGe Detector by Using GEANT', Proceedings of the Korean Nuclear Society Autumn Meeting, Yongpyong, Korea, (2002) (in Korean)
  20. S. Kamboj and B. Kahn, 'Evaluation of Monte Carlo simulation of photon counting efficiency for germanium detectors', Health Phys. 70, 512 (1996) https://doi.org/10.1097/00004032-199604000-00008
  21. M.A. Ludington and R.G. Helmer, 'High accuracy measurements and Monte Carlo calculations of the relative efficiency curve of an HPGe detector from 433 to 2754 keV', Nucl. Instr. and Meth. A 446, 506 (2000) https://doi.org/10.1016/S0168-9002(99)01253-X
  22. M.G. -Talavera, H. Neder, M.J. Daza and B. Quintana, 'Towards a proper modeling of detector and source characterstics in Monte Carlo simulations', Appl. Rodiat. Isot. 52, 777 (2000) https://doi.org/10.1016/S0969-8043(99)00244-4
  23. I.O.B. Ewa, D. Bodizs, Sz. Czifrus and Zs. Molnar, 'Monte Carlo determination of full energy peak efficiency for a HPGe detector', Appl. Radiat. Isot. 55, 103 (2001) https://doi.org/10.1016/S0969-8043(00)00366-3
  24. A. Owens, 'A comparison of empirical and semiempirical efficiency calculations for Ge detectors', Nucl. Instr. and Meth. A 274, 297 (1989) https://doi.org/10.1016/0168-9002(89)90394-X
  25. J.F. Knoll, Radiation Detection and Measurement, 3rd ed., p. 430, John Wiley & Sons, Inc., New York (1999)