Full-energy peak efficiency of Si drift and Si(Li) detectors for photons with energies above the Si K binding energy

2016 ◽  
Vol 46 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Suelen F. Barros ◽  
Nora L. Maidana ◽  
José M. Fernández-Varea ◽  
Vito R. Vanin
Keyword(s):  
Binding Energy ◽  
Full Energy Peak ◽  
Peak Efficiency ◽  
Full Energy ◽  
Energy Peak ◽  
Full Energy Peak Efficiency

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.

scholarly journals Full-energy peak efficiency of asymmetrical polyhedron germanium detector

2018 ◽  
Vol 33 (2) ◽  
pp. 150-158
Author(s):  
Mahmoud Abbas ◽  
Sara Yoseph ◽  
Ahmed El-Khatib ◽  
Mohamed Badawi ◽  
Mona Gouda ◽  
...  
Keyword(s):  
Mathematical Method ◽  
Solid Angle ◽  
Germanium Detector ◽  
Full Energy Peak ◽  
Radioactive Isotopes ◽  
Peak Efficiency ◽  
Full Energy ◽  
Wide Range ◽  
Energy Peak ◽  
Full Energy Peak Efficiency

To understand the nuclear structure for most elements, it is essential to investigate the nuclear excitations by using high precision gamma-ray spectroscopy in which intensive measurements should be carried out. This is becoming a new challenge for the radiation scientific community nowadays, where the instrumentations and technical advances must be developed to be used in a wide range of applications. To discover the weakest nuclear reaction, the maximum probability of the detection system of the total energy of any released individual photon must be determined. In this work, a new mathematical method to calculate the absolute full-energy peak efficiency of asymmetrical polyhedron germanium detector is presented. This type of detector can be arranged in array, forming ?complex detectors of encapsulated germanium crystals?, with the solid angle reaching 82 % of total solid angle coverage, i. e., with the highest possible efficiency and with a good quality of spectral response. In addition, the photon path length was enclosed in the mathematical method to determine its attenuation through different materials such as, the detector active medium and any other material in-between source-detector system during the measuring process. The comparison between the efficiency calculated in this work and that of the published Monte Carlo simulation showed a good agreement and a small variation. However, the method discussed in the current work can be useful in nuclear safeguards, in overcoming the huge difficulties in identification of the energy range of radioactive isotopes and their quantities in nuclear waste.

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