Compton back scatter imaging for mild steel rebar detection and depth characterization embedded in concrete

Margret, M.; Menaka, M.; Venkatraman, B.; Chandrasekaran, S.

doi:10.1016/j.nimb.2014.10.029

Cited by 20 publications

(10 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The energy of the scattered photons and the scattered electrons can be seen from Eqs. (1) and ( 2), respectively [20]. Scattered photons can be detected by a detector.…”

Section: Methodsmentioning

confidence: 99%

“…Void inspection in concrete has been performed with various gamma sources, detector types, and simulation methods. An HPGe detector and 137 Cs gamma ray source has been used for Portland concrete inspection using MCNP by Priyada, et al [19]; the same kind of gamma source and detector type were used to detect steel embedded in concrete by Margret, et al [20]; and using PENELOPE-2008, gamma-ray exposure in steel and a concrete-lined chamber was calculated by Mer,k et al [21]. Inspection of reinforced concrete using Compton backscattering has been performed using CdTe semiconductor detectors and 241 Am gamma sources by Boldo, et al [22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

Sari

Wirawan

Waris

et al. 2019

J. Eng. Technol. Sci.

View full text Add to dashboard Cite

A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60 Co and 137 Cs as gamma-ray sources. The void's location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60 Co as the gamma-ray source, 137 Cs is a better choice for application in NDT systems using Compton scattering.

show abstract

“…The energy of the scattered photons and the scattered electrons can be seen from Eqs. (1) and ( 2), respectively [20]. Scattered photons can be detected by a detector.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

Sari

Wirawan

Waris

et al. 2019

J. Eng. Technol. Sci.

View full text Add to dashboard Cite

show abstract

“…Há algum tempo o uso do retroespalhamento de radiação gama para a realização de ensaios não destrutivos vem sendo estudado para verificação de estruturas de concreto armado (PRIYADA, et al, 2013(PRIYADA, et al, , 2014MARGRET, et al, 2015). O principal meio de análise é através do espalhamento Compton, já que ocorre no intervalo de energia dos radioisótopos mais comuns disponíveis comercialmente, tornando o procedimento mais acessível.…”

Section: Fundamentação Teóricaunclassified

Desempenho de colimadores cônicos para um experimento de espalhamento Compton usando o método de Monte Carlo

Olivo

Boldo

2020

BJD

View full text Add to dashboard Cite

RESUMOO desenvolvimento de um sistema portátil para avaliação não destrutiva de estruturas de concreto armado envolve muitas dificuldades. A técnica do retroespalhamento Compton vem sendo estudada para este uso e necessita de refinamentos. O colimador é peça fundamental para que o sistema gere resultados confiáveis e precisa de aprimoramentos tanto relacionados à sua posição em relação à fonte, quanto ao seu modelo. Neste artigo, objetiva-se otimizar este sistema verificando-se o desempenho de colimadores cônicos através de simulação computacional. As análises foram feitas utilizando-se o código FLUKA para simulação de Monte Carlo. Os testes foram feitos com dois colimadores cilíndricos e dois colimadores cônicos com tamanhos diferentes, visando comparar o desempenho tanto relacionado aos diferentes modelos, quanto relacionados às diferentes dimensões. As simulações mostraram que a utilização de colimadores cônicos gera bons resultados, interferindo nos parâmetros de contraste e resolução espacial.

show abstract

“…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.

View full text Add to dashboard Cite

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.

show abstract

Compton back scatter imaging for mild steel rebar detection and depth characterization embedded in concrete

Cited by 20 publications

References 19 publications

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique

Desempenho de colimadores cônicos para um experimento de espalhamento Compton usando o método de Monte Carlo

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

Contact Info

Product

Resources

About