Application of artificial neural network in non-destructive Compton scattering densitometry

Ashrafi, Saleh; Jahanbakhsh, Okhtay; Alizadeh, Davood

doi:10.1016/j.nima.2014.05.082

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The amount of attenuation is inversely proportional to the number of γ-rays reaching the detector(s). The industrial and laboratory settings of how NaI:Tl are used to measure density can be found elsewhere (John, 1997;J et al, 2019) and (Margret et al, 2015;Ashrafi et al, 2014) respectively.…”

Section: Gamma-ray Density Toolmentioning

confidence: 99%

Radiation detectors for nuclear well-logging application: A review

Bala¹,

Jenkins²,

Namadi³

2022

dujopas

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The oil and gas industry uses nuclear logging method to survey for the presence of hydrocarbons in a given region of interest. Nuclear logging tools are used to achieve this aim. These tools consist of radiation sources and radiation detectors. 3He thermal neutron detector and NaI:Tl for gamma-ray measurements are the conventional detectors used for this application. However, the shortage of 3He gas used in 3He tube and the high demand for both detectors in many other societal applications has mandated the search for alternative radiation detectors. This paper reviewed other alternatives that are commercially available. Light output, temperature sensitivity, tolerance to vibration and shock are important parameters to consider when selecting a detector for this application. Among the reviewed alternatives, GS20 crystal for neutron and gamma ray measurements, LaBr:Ce and LuYAP:Ce for gamma ray measurement have been reported to have comparable performance to the conventional detectors.

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Section: Gamma-ray Density Toolmentioning

confidence: 99%

Radiation detectors for nuclear well-logging application: A review

Bala¹,

Jenkins²,

Namadi³

2022

dujopas

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“…Hiện nay, phương pháp đo gamma tán xạ đang được nghiên cứu rộng rãi để ứng dụng cho việc kiểm tra không hủy mẫu trong nhiều lĩnh vực của công nghiệp như: đo bề dày vật liệu dạng tấm phẳng [20] hoặc bề dày thành ng trụ [12] phát hiện và đánh giá các lỗ rỗng hoặc thanh thép bên trong bê tông [9,16], ăn mòn hoặc khuyết tật bên trong mẫu kim loại [14,19]; xác định các đặc trưng vật lý của vật liệu như mật độ kh i lượng [1,6,7], hệ s hấp thụ kh i [2], s nguyên tử hiệu dụng [3], hàm lượng của một chất bên trong hỗn hợp hoặc dung dịch [15,17]. Trong hầu hết các nghiên cứu ứng dụng của phương pháp đo gamma tán xạ, dữ liệu tán xạ một lần ghi nhận được từ phép đo là thông tin cần thiết mà nó được sử dụng để đánh giá đ i tượng cần phân t ch.…”

Section: Mở đầUunclassified

The effect of the diameter of the detector collimator on saturation thickness in gamma scattering measurement

Huynh

et al. 2017

Sci. Tech. Dev. J. - Nat. Sci.

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The effect of the diameter of the detector collimator on the saturation thickness in gamma-scattering measurements is studied using the spectrum of singly scattering. Geometric arrangement of gamma-scattering measurement includes: a gamma-ray collimated beam with the energy of 662 keV emitted from 137Cs source is irradiated on a rectangular aluminium target with incident angle of 90o, and detector NaI(Tl) 5.1cmx5.1cm with collimator is used to record the scatterd gamma rays at scattered angle of 120°. The experimental measurements are carried out to obtain scattered spectra with various target thickness and diameter of detector collimator. The profile of the singly scattering and multiply scattering in the scattered spectra are determined by a spectrum processing technique based on the least squares fitting. The experimental results showed that the saturation thickness of the counts of singly scattering increases with increasing the window diameter of the detector collimator. These results will support for the non-destructive testing research of application of gamma-scattering method to determine the thickness or the defect of the sample.

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“…Examples of these spectral lines are seen in 58 keV and 202 keV energies due to the recoil of 127 I nuclei 850 keV due to the interaction of neutrons with steel as one of the shield materials [1]. In studies which are done in the field of industrial tomography using NaI(Tl) detector and 662 keV photons, gamma source, 137 Cs (10 mCi) and a neutron source, AmBe (50 mCi) was used that they were technically inseparable [2,3]. This research is done to estimate the contribution of fast neutrons` second gamma rays in the gamma spectrum detected by NaI(Tl) (63 mm×63 mm) scintillator under two different experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Gamma Spectrometry in the Presence of Fast Neutrons

Hassanzadeh¹,

Allahverdy²,

Jahanbakhsh³

et al. 2019

fbt

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Purpose: In some gamma spectroscopy experiments, neutrons may also be present, so depending on experimental conditions, Gamma spectroscopy can be influenced by the presence of neutrons. Materials and Methods: In this study, a NaI(Tl)(63 mm×63 mm) detector is used to investigate the effects of fast neutrons on the spectrum of gamma photons. The radiation source used in these experiments is made up of two point sources: an AmBe (50 mCi) neutron source and a 137Cs(10 mCi) gamma source. Results: Results were determined through both measurements and Monte Carlo simulation (MCNPX) under two different experimental conditions and were compared. When the detector is placed under an angle to the source, gamma photon energy peaks resulting from inelastic interactions of the fast neutrons with the detector materials and surrounding materials in the energy range of 0.1-0.9(MeV) are pretty visible in the gamma main spectrum. These results can be used to optimize industrial tomography experiments carried out with NaI(Tl) scintillators. Conclusion: Also, the results show that the detection of fast neutrons with a NaI(Tl) scintillator is possible with low efficiency.

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Application of artificial neural network in non-destructive Compton scattering densitometry

Cited by 6 publications

References 12 publications

Radiation detectors for nuclear well-logging application: A review

Radiation detectors for nuclear well-logging application: A review

The effect of the diameter of the detector collimator on saturation thickness in gamma scattering measurement

Gamma Spectrometry in the Presence of Fast Neutrons

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