Subtraction of natural radiation contribution from gamma-ray spectra measured by HPGe detector

2018 ◽  
Vol 134 ◽  
pp. 167-171 ◽  
Author(s):  
Petr Kovář ◽  
Jaroslav Šolc
Keyword(s):  
Hpge Detector ◽  
Gamma Ray ◽  
Natural Radiation

Neutron, proton and gamma-ray event identification with a HPGe detector through pulse shape analysis

1991 ◽  
Vol 38 (2) ◽  
pp. 200-208 ◽  
Author(s):  
G.J. Bamford ◽  
A.C. Rester ◽  
R.L. Coldwell ◽  
C.M. Castaneda
Keyword(s):  
Shape Analysis ◽  
Hpge Detector ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Analysis ◽  
Event Identification

Using a clinical linac to determine the energies of gamma-ray transitions and half-lives of barium nuclei

2020 ◽  
Vol 35 (10) ◽  
pp. 2050062
Author(s):  
Abdullah Engin Çalık ◽  
Kaan Manisa ◽  
Ahmet Biçer ◽  
Mehmet Erdoğan ◽  
Mürsel Şen ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Linear Accelerator ◽  
Nuclear Physics ◽  
Hpge Detector ◽  
Gamma Ray ◽  
Energy Levels ◽  
Photonuclear Reactions ◽  
High Purity Germanium ◽  
Physics Experiment ◽  
First Time

Photonuclear reactions have great importance in understanding the structure of the nuclei. These reactions, performed using the gamma rays obtained by way of bremsstrahlung, are a standard nuclear physics experiment. In this study, a non-enriched barium sample was activated for the first time by using a clinical linear accelerator (cLINACs). The spectrum of barium radioisotopes was obtained by using a gamma spectrometry with a high purity germanium (HPGe) detector. The obtained spectroscopic data were analyzed and energy levels and half-life values together with their uncertainties were obtained. Some energy levels and half-lives of [Formula: see text]Ba were determined with more precision than those of literature values.

Modeling an HPGe detector response to gamma-rays using MCNP5 code

2019 ◽  
Vol 30 (11) ◽  
pp. 1950099
Author(s):  
I. V. Prozorova ◽  
R. R. Sabitova ◽  
N. Ghal-Eh ◽  
S. V. Bedenko
Keyword(s):  
Computational Model ◽  
Response Function ◽  
Hpge Detector ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Dead Layer ◽  
Acquisition Time ◽  
Detector Response ◽  
Simulated Model ◽  
Mcnp5 Code

The response function is the important information for the precise interpretation of experimental data and also for characterizing the developing nuclear instruments. Measurement of the response function normally requires a number of mono-energetic gamma-ray sources, a long acquisition time and an appropriate experimental setup. The Monte Carlo method, as an alternative to response function measurement, has widely been used and recommended. In this study, a computational model of an HPGe detector has been developed by using the MCNP5 code. To validate the simulated model, the simulations from mono-energetic sources have been compared to the corresponding measured data. Any deviation from the measurement could be attributed to the unmodeled details of the detector crystal, so they needed adjustment. Moreover, an analysis has been undertaken on the dependency of detection efficiency on the dead layer thickness of the germanium crystal. Having developed a computational model of the crystal, a set of correction factors was extracted to take into account the gamma-ray self-absorption within the source volume. The simulated model of the HPGe detector in this study can be used to calculate the detection efficiency when the samples are not of the standard geometry which require self-absorption considerations.

Effective gamma-ray doses due to natural radiation from soils of southeastern Brazil

2010 ◽  
Author(s):  
M. A. G. Silveira ◽  
N. H. Medina ◽  
R. H. Moreira ◽  
B. S. Bellini ◽  
V. A. P. Aguiar ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Southeastern Brazil ◽  
Natural Radiation

Analysis of Ground Fissures Using Content Ratios of Nuclides by Car-Borne Survey

1988 ◽  
Vol 24 (1-4) ◽  
pp. 59-62 ◽  
Author(s):  
S. Kimura
Keyword(s):  
Hot Springs ◽  
Gamma Ray ◽  
Moving Average ◽  
Threshold Value ◽  
Positive Deviation ◽  
Dose Ratio ◽  
Natural Radiation ◽  
Ground Fissures ◽  
Oil And Natural Gas ◽  
Main Index

Abstract A new system was tested for car-borne and manual surveys of natural radiation to detect open fissures concealed in the ground. Positive deviation of the primary gamma ray dose ratio of 214Bi and 208Tl from its moving average was adopted as the main index. Localities where the positive deviation exceeded a threshold value gave a good indication of the existence of covered open fissures. The lowest of the deviations in a traverse was proportional to the amount of 222Rn ascending through fissures. This measurement system proved to be effective in prospecting for ground-water, hot springs, uranium, oil and natural gas resources and in earthquake prediction studies.

scholarly journals Measurement of Environmental Gamma Dose at AECD Campus of Bangladesh

2014 ◽  
Vol 6 (2) ◽  
pp. 285-291 ◽  
Author(s):  
M. S. Rahman ◽  
M. A. Islam ◽  
A. Begum ◽  
M. M. Rahman ◽  
M. H. Ahsan
Keyword(s):  
Dose Rate ◽  
Global Positioning System ◽  
Hpge Detector ◽  
Gamma Ray ◽  
Gamma Dose ◽  
Positioning System ◽  
Gps Navigation ◽  
Global Positioning ◽  
Measured Dose

A portable HPGe detector has been employed to assess environmental gamma-ray dose following in-situ technique from the primordial radionuclide 40K in the soil at 15 monitoring points (MPs) in the environment at the Atomic Energy Centre, Dhaka (AECD) campus, Bangladesh. The MPs were marked-out using Global Positioning System (GPS) navigation. The measured dose rate due to 40K range from 0.0428 µGy.h-1 to 0.1222 µGy.h-1 with an average of 0.0828 ± 0.0225 µGy.h-1. Keywords: Gamma; Environment; Dose rate.© 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v6i2.17146 J. Sci. Res. 6 (2), 285-291 (2014)  

scholarly journals Radioactivity Concentrations in Soil Samples from Kandam, Gyalgyal, Burmawan masaka, Dinbisu and Giyawa Mines in Wurno LGA, Sokoto State, Nigeria

2018 ◽  
pp. 1-9
Author(s):  
Y. M. Ahijjo ◽  
A. N. Baba-Kutigi ◽  
M. Momoh ◽  
A. M. Bayawa ◽  
M. Hussain
Keyword(s):  
Hpge Detector ◽  
Gamma Ray ◽  
Soil Samples ◽  
Gamma Ray Spectrometry ◽  
Sample Population ◽  
Radiological Parameters ◽  
Activity Concentrations ◽  
The Mean ◽  
Channel Analyzer ◽  
Elevated Exposure

Aims: This study was conducted in a bid to ascertain the concentration of NORMS in the soil samples dugout of some mining sites in Kandam, Gyalggal, Burmawan masaka, Dinbisu and Giyawa town in Wurno LGA, Sokoto State Nigeria. The concerns about NORMS radioactivity in the environment are frequently linked to natural radioactivity which is more of primordial radionuclides. Study Design: A total number of nine soil samples were randomly collected for this study. The randomness was in order to represent over 90% of the sample population of different mines in Wurno LGA, Sokoto state for the analysis of gamma-ray spectrometry of High Purity Germanium (HPGe) detector coupled to a Multi-Channel Analyzer (MCA). Place and Duration of Study: Department of Physics, Usmanu Danfodiyo University, Sokoto, Nigeria, between August 2015 and June 2016. Methodology: The concentrations of the radionuclides (226Ra, 232Th and 40K) were ascertained through a high-resolution gamma-ray spectrometry of HPGe detector coupled with a Multi-Channel Analyzer, Centre for Advanced Studies in Physics (CASP), Government College University (GCU), Lahore, Pakistan. The activity concentrations of 226Ra, 232Th and 40K in the soil samples were obtained and used to calculate the radiological parameters ( Raeq, Hex, Hin, DAbs and Deff ) in order to assess the radiological impacts on the inhabitants. Results: The mean activity concentrations for 226Ra, 232Th and 40K in the soil samples were found to be 58.34, 53.76 and 679.70 Bqkg-1 while the radiological hazards parameters revealed mean values of 187.55 Bqkg-1, 0.51, 0.66, 87.77 nGy.h-1 and 107.64 μScyr -1 for Raeq, Hex, Hin, DAbs  and Deff respectively. These were compared with the results of similar studies conducted elsewhere and around the world. It was noticed that 40K contributes the highest level of radioactivity in this study which could enhance the amount of background radiation received by the population in the study area. The activity concentration unveiled from the soil samples were considerably lower for 226Ra and 232Th when compared to the activity of 40K. The mean value of the doseused to calculate the radiological parameters calculations shows that an elevated exposure to radioactivity by the inhabitants around this mine is eminent.  Conclusion: Cancer and various forms of ailment due to radioactivity exposure are further anticipated for the workers in the pits and the dwelling communities.

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