Reliability of two calculation codes for efficiency calibrations of HPGe detectors.
نویسندگان
چکیده
This paper reports the reliability of efficiency calibrations for gamma-ray detectors using the calculation codes ANGLE and LabSOCS. For experimental verification, three HPGe detectors under various laboratory geometry configurations were used for this study. An overall comparison between experimental and calculated efficiency calibration curves is presented and comments on the various error sources affecting the final results are given. The deviations are generally below 10%, which could be acceptable for many applications.
منابع مشابه
Determination of virtual point for HPGe detector at various gamma rays energies by simulation and experimental methods
High Purity Germanium detectors (HPGe) are subdivisions of semiconductor detectors which are widely used in nuclear technology from space industry to nuclear medicine, due to their high resolution, low dead time, unlimited size and compatibility with a variety of environments. The( absolute and intrinsic) efficiency of the HPGe detector, which depends on the geometry of the source-detector syst...
متن کاملMathematical Calibration of a Whole-Body Counter
This paper describes the mathematical efficiency calibration of the whole-body counter at Forschungszentrum Jülich using Monte Carlo codes and mathematical anthropomorphic phantoms. As a prerequisite for the Monte Carlo simulations a precise model of the 4 high-purity germanium (HPGe) detectors had to be developed. Because the technical data provided by the manufacturer were not sufficient for ...
متن کاملمدلسازی تغییرات ضخامت لایه مرده در شبیه‌سازی MCNP آشکارساز HPGe جهت بهینه‌سازی محاسبه بازده شمارش نمونه‌های داخل ظرف مارینلی
In this research, a method for considering the spatial variation of deal layer (DL) thickness at the lateral and top surfaces of HPGe detectors is presented to achieve a more precise simulation model for efficiency calculation especially in marinelli beaker geometries. As a good approximation, the lateral surface of the detector is divided into 12 segments, assuming each segment covers 30 degre...
متن کاملA Comparative Study of Field Gamma-ray Spectrometry by NaI(Tl) and HPGe Detectors in the South Caspian Region
Natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. In the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...
متن کاملImproving Calibration of HPGe Detectors for In Situ Measurements – a Comparison of Semi-empirical and Monte Carlo Methods
Calibrations of an HPGe detector were made with respect to photon energy and angle of incidence for the use in field gamma spectrometry. The same detector was modelled in MCNP4C and simulated. This revealed some significant differences between the theoretical (simulated) efficiency and the measured efficiency of the detector, especially at lower energies. In order to investigate the reason for ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
دوره 56 5 شماره
صفحات -
تاریخ انتشار 2002