scholarly journals A study of the validity of the efficiency transfer method to calculate the peak efficiency using γ-ray detectors at extremely large distances

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Ahmed M. El-Khatib ◽  
Mohamed S. Badawi ◽  
Mohamed A. Elzaher ◽  
Abouzeid A. Thabet
Keyword(s):  
Peak Efficiency ◽  
Γ Ray ◽  
Transfer Method ◽  
Efficiency Transfer Method

scholarly journals Calibration of NaI (Tl) cylindrical detector using axially shifted radioactive cylindrical sources

2019 ◽  
Vol 34 (4) ◽  
pp. 353-360
Author(s):  
Mona Gouda
Keyword(s):  
Theoretical Approach ◽  
Path Length ◽  
Detector System ◽  
Gamma Photon ◽  
Peak Efficiency ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Transfer Method ◽  
Efficiency Transfer Method ◽  
Good Agreement

In this article, the full energy peak efficiency of NaI detector using non-axial cylindrical sources is calculated by using a new efficient theoretical approach. This approach depends on using the efficiency transfer method and analytical calculations of the average path length of a gamma photon inside the source to the detector system. Measured efficiencies made by using 152Eu aqueous radioactive cylindrical sources with volumes 25 ml and 400 ml. Comparing calculated efficiencies to the measured one showed good agreement enabling the validation of this approach.

Calculation of the full-energy peak efficiency of NaI(Tl) detector using the efficiency transfer method for large radioactive cylindrical sources

2016 ◽  
Vol 54 (4) ◽  
pp. 592-606
Author(s):  
Ahmed. M. El-Khatib ◽  
Mona. M. Gouda ◽  
Mohamed. S. Badawi ◽  
A. Hamzawy ◽  
Nancy. S. Hussien ◽  
...  
Keyword(s):  
Full Energy Peak ◽  
Peak Efficiency ◽  
Full Energy ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Transfer Method ◽  
Efficiency Transfer Method

scholarly journals Modeling the impact of uncertainty in detector specification on efficiency values of a HPGe detector using ANGLE software

2013 ◽  
Vol 28 (2) ◽  
pp. 169-181 ◽  
Author(s):  
Maurice Miller ◽  
Mitko Voutchkov
Keyword(s):  
Hpge Detector ◽  
Efficiency Curve ◽  
Peak Efficiency ◽  
Detector Characterization ◽  
Transfer Method ◽  
P Type ◽  
The Impact ◽  
First Time ◽  
Efficiency Transfer Method ◽  
Full Peak

The objective of this study is to model the impact of uncertainties in the engineering specifications of a typical p-type HPGe detector on the efficiency values when the measured soil sample is in contact geometry with the detector. We introduce a parameter named the normalized sensitivity impact which allows a comparative analysis to be made of the impact of the detector specification uncertainties and develop a correction factor table for the most important parameters. The areas of the detector most susceptible to error were found to be the crystal geometry, vacuum layer above the crystal and the bulletizing radius. In all cases the major impacts were mathematically modeled - for the first time - and found to vary either quadratically or logarithmically over the energy range of 180 keV to 1500 keV. Finally, we propose a set of detector characterization values that may be used in ANGLE for generating a reference efficiency curve using the efficiency transfer method inherent in this software. These values are to be used with the understanding that their uncertainty impact on the full-peak efficiency though not very significant in this counting arrangement, is not non-zero.

scholarly journals The Determination of γ Ray Peak Efficiency with Self-absorption Correction

RADIOISOTOPES ◽  
1979 ◽  
Vol 28 (1) ◽  
pp. 24-26 ◽  
Author(s):  
Kenji TAKEDA ◽  
Tetsutaro HONDA ◽  
Masayasu NOGUCHI
Keyword(s):  
Peak Efficiency ◽  
Absorption Correction ◽  
Γ Ray

A LARGE-VOLUME, COAXIAL, LITHIUM-DRIFT, GERMANIUM GAMMA-RAY SPECTROMETER

1965 ◽  
Vol 43 (7) ◽  
pp. 1173-1181 ◽  
Author(s):  
H. L. Malm ◽  
A. J. Tavendale ◽  
I. L. Fowler
Keyword(s):  
High Resolution ◽  
Large Volume ◽  
Gamma Ray ◽  
Sensitive Volume ◽  
Peak Efficiency ◽  
Full Energy ◽  
Gamma Ray Spectrometer ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Γ Ray

A high-resolution, germanium p-i-n diode gamma-ray spectrometer has been made using the coaxial method of lithium drift. The detector described is ~ 16 cm3 in sensitive volume, three to four times that of the largest "planar" drifted diodes of this type described to date. Its performance as a spectrometer is comparable with that of smaller diodes; resolutions (fwhm) of 3.3 and 4.8 keV were obtained at γ-ray energies of 122 and 1 333 keV respectively with a detector bias of 1 000 to 1 500 V. Typical γ-ray spectra obtained with sources of 57Co, 60Co, 137Cs, and Th(B + C + C″) are shown. Also shown are curves of intrinsic full-energy peak efficiency over a range of energies. This efficiency is 2.5% at 1 300-keV γ-ray energy—comparable to that of a NaI scintillation spectrometer 1 in. in diameter by 1 in. long.

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