scholarly journals Development of a semi-empirical calibration method by using a LaBr3(Ce) scintillation detector for NORM samples analyses

2021 ◽  
Vol 27 ◽  
pp. 199
Author(s):  
E. Ntalla ◽  
A. Markopoulos ◽  
K. Karfopoulos ◽  
C. Potiriadis ◽  
A. Clouvas ◽  
...  
Keyword(s):  
Energy Range ◽  
Photon Energy ◽  
Gamma Spectrometry ◽  
Scintillation Detector ◽  
Calibration Method ◽  
Peak Efficiency ◽  
Empirical Calibration ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Semi Empirical

In this study, a semi-empirical calibration method for NORM samples measurement by using a LaBr3(Ce) scintillator was developed based on a combination of experimental gamma spectrometry measurements and MCNP-X simulations. The aim of this work is to provide us with full energy peak efficiency calibration curves in a wide photon energy range which is of particular importance when selected photon energies of 234Th, 214Pb, 214Bi, 228Ac, 208Tl and 226Ra are to be measured with accuracy.

scholarly journals NaI(Tl) Detector Efficiency Computation Using Radioactive Parallelepiped Sources Based on Efficiency Transfer Principle

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Mohamed S. Badawi ◽  
Mona M. Gouda ◽  
Ahmed M. El-Khatib ◽  
Abouzeid A. Thabet ◽  
Ahmed A. Salim ◽  
...  
Keyword(s):  
Scintillation Detector ◽  
Theoretical Method ◽  
Simulation Method ◽  
Wide Energy Range ◽  
Peak Efficiency ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Detector Surface ◽  
Wide Energy ◽  
Effective Solid Angle

The efficiency transfer (ET) principle is considered as a simple numerical simulation method, which can be used to calculate the full-energy peak efficiency (FEPE) of3″×3″NaI(Tl) scintillation detector over a wide energy range. In this work, the calculations of FEPE are based on computing the effective solid angle ratio between a radioactive point and parallelepiped sources located at various distances from the detector surface. Besides, the attenuation of the photon by the source-to-detector system (detector material, detector end cap, and holder material) was considered and determined. This method is straightforwardly useful in setting up the efficiency calibration curve for NaI(Tl) scintillation detector, when no calibration sources exist in volume shape. The values of the efficiency calculations using theoretical method are compared with the measured ones and the results show that the discrepancies in general for all the measurements are found to be less than 6%.

scholarly journals Progress in radionuclide characterisation in marine sediments using an underwater gamma-ray spectrometer in 2π geometry

2019 ◽  
Vol 21 ◽  
pp. 29
Author(s):  
E. G. Androulakaki ◽  
C. Tsabaris ◽  
M. Kokkoris ◽  
G. Eleftheriou ◽  
D. L. Patiris ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Detection System ◽  
Full Energy Peak ◽  
Gamma Ray Spectrometry ◽  
Peak Efficiency ◽  
Full Energy ◽  
Effective Manner ◽  
Energy Peak ◽  
Full Energy Peak Efficiency

The in-situ gamma-ray spectrometry is a well suited method for seabed mapping applications, since it provides rapid results in a cost effective manner. Moreover, the in-situ method is preferable to the commonly applied laboratory measurements, due to its beneficial characteristics. Therefore, the development of in-situ systems for seabed measurements continuously grows. However, an efficiency calibration of the detection system is necessary for obtaining quantitative results in the full spectral range. In the present work, an approach for calculating the full-energy peak efficiency of an underwater insitu spectrometer for measure- ments on the seabed is presented. The experimental work was performed at the coastal site of Vasilikos (Cyprus). The experimental full-energy peak efficiency of the in-situ was determined in the energy range 1400–2600 keV, by combining the in-situ and laboratory reference measurements. The experimental effi- ciency results were theoretically reproduced by means of Monte Carlo (MC) simulations, using the MCNP5 code.

Sign in / Sign up

Export Citation Format

Share Document