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Characterizing the coaxial HPGe detector using Monte Carlo simulations and evolutionary algorithms.

Irina V Prozorova1, Nima Ghal-Eh2, Sergey V Bedenko3

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Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|May 6, 2021
PubMed
Summary

A new, cost-effective method was developed to characterize high-purity germanium detectors (HPGe) in a standard lab. This technique optimizes detector parameters, reducing costs and improving gamma spectrometer calibration.

Keywords:
CalibrationDifferential evolution algorithmEfficiencyGamma spectrometerHPGe DetectorMCNP5 Monte Carlo code

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Area of Science:

  • Nuclear Instrumentation
  • Detector Physics
  • Computational Physics

Background:

  • Standard characterization of high-purity germanium detectors (HPGe) is expensive and proprietary.
  • HPGe detector characteristics can change over time, necessitating repeated, costly procedures.
  • Existing methods lack cost-effectiveness and accessibility for standard research laboratories.

Purpose of the Study:

  • To develop a cost-effective technique for characterizing HPGe detectors in a standard research laboratory.
  • To optimize the determination of HPGe detector geometrical parameters.
  • To establish a standardized, reproducible procedure for HPGe detector modeling.

Main Methods:

  • Utilized the Monte Carlo method for precise determination of detector geometrical parameters.
  • Employed evolutionary algorithms for the optimization of detector characteristics.
  • Integrated geometrical parameter determination with an optimization process for a holistic approach.

Main Results:

  • Successfully developed a cost-effective procedure for HPGe detector characterization.
  • Demonstrated the feasibility of optimizing detector parameters using Monte Carlo and evolutionary algorithms.
  • Established a standardized modeling approach for HPGe detectors.

Conclusions:

  • The developed technique offers a viable, economical alternative to proprietary characterization methods.
  • The approach facilitates accurate modeling and optimization of HPGe detectors.
  • Results are beneficial for the development and calibration of gamma spectrometers for routine measurements.