Iranian Journal of Medical Physics

Iranian Journal of Medical Physics

Response of Cadmium Zinc Telluride Compound Semi-Conductor Detector against Gamma Photons by Efficiency Calculation: A Microdosimetry Simulation Study

Document Type : Original Paper

Authors
Golnaz Barzgarnezhad
Ahmad Esmaili Torshabi
Faculty of Sciences and Modern Technologies, Graduate University of Advanced Technology, Kerman, Iran
10.22038/ijmp.2019.43393.1656
Abstract
Introduction: Cadmium zinc telluride has recently been used as a compound semiconductor detector in a wide range of fields. The current study is a comprehensive investigation of the performance of this detector against the photon beam. Moreover, a comparative study was carried out with other common detectors using the Mote Carlo code by the implementation of the same strategy.
Material and Methods: During the simulation by FLUKA code, a number of photons were regarded as primary particles. It is attractive to trace each incident photon uniquely considering all possible collisions and produced secondary particles at the microdosimetry scale. In the current study, the coordinate of three-dimensional collisions location was realized at detector sensitive volume. Moreover, energy deposition was considered at each unique collision and through all interactions, totally. In addition, the physical concepts of photon interaction with detector volume were assessed, numerically. Furthermore, the effect of gold foils implemented as electrode at both sides of the detector was taken into account.
Results: The obtained results indicated the context of photoelectric and Compton scattering in photon interactions with CZT, including the number of interactions, the deposited energy, and three-dimensional collision coordinate, while the latter case is proposed as a new achievement.
Conclusion: As evidenced by the obtained results, the performance of this detector can be improved by changing material fraction and detector dimension to achieve optimum efficiency. In addition, the comparative results demonstrated that the efficiency of CZT covered by gold electrodes is superior to other common available semi-conductor detectors.
Keywords
Semiconductors
Radiation Dosimetry
Photons
Efficiency
Monte Carlo code
Subjects

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    1. Fritz SG, Shikhaliev PM. CZT detectors used in different irradiation geometries simulations and experimental results. Med phy. 2009; 36: 1098-108.
    2. Verger L, Gentet M C, Gerfault L, Guillemaud R, Mestais C, Monnet O, et al. Performance and perspectives of a CdZnTe-based gamma camera for medical imaging.  Nucl Sci, IEEE Transactions. 2004; 51: 3111-7.
    3. Lee YJ, Ryu HJ, Cho HM, Lee SW, Choi YN, Kim HJ. Optimization of an ultra-high-resolution parallel-hole collimator for CdTe semiconductor SPECT system. Journal of Instrumentation. 2013;8(01):C01044.
    4. Shor A, Eisen Y, Mardor I. Optimum spectroscopic performance from CZT Gamma and X-ray detectors with pad and strip segmentation. Nucl. Instrum. Methods. Phys. Res A. 1999; 428 :182-92.
    5. Knoll GF. Radiation detection and measurement. John Wiley & Sons; 2010 Aug 16.
    6. Nakhostin M, Esmaili Torshabi A. The influence of electron track lengths on the γ-ray response of compound semiconductor detectors. Nucl Instrum Methods Phys Res A. 2015; 797: 255-9.
    7. Park SH, Ha JH, Lee JH, Cho YH, Kim HS, Kang SM, et al. Fabrication of CZT Planar-Type Detectors and Comparison of their Performance. J Nucl Sci Tech. 2008; 45: 348-51.
    8. Bradley PD, Rosenfeld AB, Zaider M. Solid state microdosimetry. Nucl Instrum Methods Phys Res B. 2001; 184: 135-57.
    9. Abbaspour S. Mahmoudian B, Pirayesh Islamian J. Cadmium Telluride Semiconductor Detector for Improved Spatial and Energy Resolution Radioisotopic Imaging.  World J Nucl Med. 2017; 16: 101–7.
    10. Kellerer AM. An assessment of wall effects in microdosimetric measurements. Radiat Res. 1971; 47: 377-86.
    11. Bradley PD, Rosenfeld AB, Lee KK, Jamieson DN, Heiser G, Satoh S. Charge collection and radiation hardness of a SOI microdosimeter for medical and space applications. IEEE transactions on nuclear science. 1998 Dec;45(6):2700-10.
    12. Cornelius I, Siegele R, Rosenfeld AB, Cohen DD. Ion beam induced charge characterisation of a silicon microdosimeter using a heavy ion microprobe. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2002;190(1-4):335-8.
    13. Shah KS. Lund JC, Olschner F. Charge collection efficiency in a semiconductor radiation detector with a non-constant electric field. IEEE Trans Nucl Sci. 1990; 37:183–6.
    14. Zikovsky L, Chah B. A computer program for calculating Ge (Li) detector counting efficiencies with large volume samples. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1988;263(2-3):483-6.
    15. Selim YS, Abbas MI, Fawzy MA. Analytical calculation of the efficiencies of gamma scintillators. Part I: Total efficiency for coaxial disk sources. Radiation Physics and Chemistry. 1998;53(6):589-92.
    16. Jehouani A, Ichaoui R, Boulkheir M. Study of the NaI(Tl)efficiency by Monte Carlo method. Appl Radiat Isotopes. 2000; 53: 887–91.
    17. Abbas MI. Analytical formulae for well-type NaI (Tl) and HPGe detectors efficiency computation. Applied Radiation and Isotopes. 2001;55(2):245-52.
    18. Fasso A, Ferrari A, Ranft J, Sala PR. FLUKA: a multi-particle transport code. CERN-2005-10; 2005.
    19. Böhlen TT, Cerutti F, Chin MP, Fassò A, Ferrari A, Ortega PG, et al. The FLUKA code: developments and challenges for high energy and medical applications. Nuclear data sheets. 2014 Jun 1;120:211-4.
    20. Battistoni G, Bauer J, Boehlen TT, Cerutti F, Chin MP, Dos Santos Augusto R, Ferrari A, Ortega PG, Kozłowska W, Magro G, Mairani A. The FLUKA code: an accurate simulation tool for particle therapy. Frontiers in oncology. 2016;6:116.
    21. Guthoff M, de Boer W, MüllerS. Simulation of beam induced lattice defects of diamond detectors using FLUKA. Nucl. Instrum. Methods Phys. Res A. 2014; 735: 223-8.
    22. Yalcin S, Gurler O, Kaynak G, Gundogdu O. Calculation of total counting efficiency of a NaI(Tl) detector by hybrid Monte-Carlo method for point and disk sources. Appl Radiat Isotopes. 2007; 65: 1179–86.
    23. Andersen V, Ballarini F, Battistoni G, Campanella M, Carboni M, Cerutti F, et al. The FLUKA code for space applications: recent developments. Adv Space Res. 2004; 34:1302–10.
    24. Mairani A, Brons S, Cerutti F, Fasso A, Ferrari A, Kramer M, et al. The FLUKA Monte Carlo code coupled with the local effect model for biological calculations in carbon ion therapy. Phys Med Biol. 2010; 55:4273–89.
    25. Vetter K. Recent Developments in the Fabrication and Operation of Germanium Detectors. ANNU REV NUCL PART S Annu Rev Nucl Part S. 2007; 57: 363-404.
    26. Luke PN and Amman M. Room-Temperature Replacement for Ge Detectors -Are We There Yet?. IEEE Trans Nucl Sci. 2007; 54: 834-42.
    27. Johnson LC, Campbell DL, Hull EL, Peterson TE. Characterization of a high-purity germanium detector for small-animal SPECT. Physics in Medicine & Biology. 2011;56(18):5877.
    28. Walton JT, Pehl RH, Wong YK, Cork CP. Si (Li) X-ray detectors with amorphous silicon passivation. IEEE Transactions on Nuclear Science. 1984;31(1):331-5.
    29. Owens A, Peacock A. Compound semiconductor radiation detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2004;531(1-2):18-37.

     

Iranian Journal of Medical Physics
Volume 17, Issue 6
November and December 2020
Pages 359-365

  • Receive Date 24 September 2019
  • Revise Date 12 December 2019
  • Accept Date 15 December 2019