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.

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.

Full-energy peak efficiency of cadmium-telluride gamma-ray spectrometers

1974 ◽  
Vol 115 (1) ◽  
pp. 13-21 ◽  
Author(s):  
P. Siffert ◽  
J.P. Gonidec ◽  
A. Cornet ◽  
R.O. Bell ◽  
F.V. Wald
Keyword(s):  
Cadmium Telluride ◽  
Gamma Ray ◽  
Full Energy Peak ◽  
Peak Efficiency ◽  
Full Energy ◽  
Energy Peak ◽  
Full Energy Peak Efficiency

scholarly journals Full Energy Peak Efficiency Calibration and Efficiency Transfer to ETNA in Gamma-ray Spectrometry

2014 ◽  
Vol 6 (3) ◽  
pp. 27-33
Author(s):  
Subrata Banik ◽  
◽  
Saudia Jannat ◽  
Satyajit Ghose ◽  
M Islam ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Full Energy Peak ◽  
Efficiency Calibration ◽  
Gamma Ray Spectrometry ◽  
Peak Efficiency ◽  
Full Energy ◽  
Energy Peak ◽  
Full Energy Peak Efficiency
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