Detection of buried landmine with X-ray backscatter technique

Yuk, Sunwoo; Kim, Kwang Hyun; Ye, Yun

doi:10.1016/j.nima.2006.07.022

Cited by 12 publications

(2 citation statements)

References 2 publications

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“…Hayward and Hubbell 1 developed a Monte Carlo method to determine the albedo factor, at 1 MeV photons scattered from semi-infinite slabs of water, aluminium, copper, tin and lead at various angles of incidence. 6 developed a land mine detection system based on backscatter X-ray principle which relates the different backscattering X-ray characteristics of materials with different densities.…”

Section: Introductionmentioning

confidence: 99%

Investigations of energy dependence of saturation thickness of multiply backscattered gamma photons in elements and alloys - an inverse matrix approach

Sabharwal

Sandhu

Singh

2011

J. Phys.: Conf. Ser.

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Abstract. In Compton scattering experiments employing thick targets one observes that the numbers of multiply backscattered photons increases with increase in target thickness and then saturate at a particular target thickness called the saturation thickness. The energy of each of gamma ray photons continues to decrease as the number of scatterings, the photon undergoes, increases in the sample having finite dimensions. The present experiment is an independent study of energy and intensity distributions of 279-, 320-, 511-, 662 keV, and 1.12 MeV gamma rays multiply backscattered from targets of different atomic numbers and alloys of various thicknesses, and are carried out in a backscattering geometry. The backscattered photons are detected by a NaI(Tl) scintillation detector. The detector response unscrambling, converting the observed pulse-height distribution to a true photon energy spectrum, is obtained with the help of a 12x12 inverse response matrix. The present experimental results confirm that for thick targets, there is significant contribution of multiply backscattered radiations emerging from the targets, having energy equal to that of singly scattered Compton process. The measured saturation thickness (in units of mean free path) for multiply backscattering of gamma photons is found to be decreasing with increase in energy of incident gamma photons.

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Section: Introductionmentioning

confidence: 99%

Investigations of energy dependence of saturation thickness of multiply backscattered gamma photons in elements and alloys - an inverse matrix approach

Sabharwal

Sandhu

Singh

2011

J. Phys.: Conf. Ser.

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show abstract

“…Additionally, because the X-ray generator and detectors are positioned on the same side of the object, the design of compact devices is possible. Given these favorable characteristics, backscatter X-ray security systems have been widely used to detect concealed illicit items in luggage, containers, vehicles, and landmines in military border areas [2][3][4]. We considered, among the available backscatter X-ray systems, a pencil-beam-based device that offers superior beam intensity per image pixel over other methods [5].…”

Section: Introductionmentioning

confidence: 99%

Development of prototype backscatter X-ray security scanner for luggage inspection

An,

Park,

Lee

et al. 2024

J. Inst.

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In the Republic of Korea, for the purpose of security screening at ports and airports, the present system for inspecting small cargo/luggage relies on transmission X-ray imaging, with which discernment of organic and powder-form materials in images is difficult. Backscatter X-ray imaging techniques, contrastingly, are sensitive to organic materials (i.e., low-Z elements) due to a higher probability of Compton scattering relative to other photon interactions. Such techniques, therefore, have the potential to be used in security screening systems for the detection of organic compounds such as drugs and explosives. In the present study, a prototype backscatter X-ray security scanner for luggage screening was developed, and its performance was evaluated at various tube voltages. It was found that the isolation contrast, which indicates the minimum discernible thickness of a plastic panel when the background material of the image is steel, was approximately 1 mm at the tube voltage of 120 kVp. Moreover, amorphously shaped contraband articles randomly hidden inside the luggage were clearly visible at tube voltages ranging from 80 to 160 kVp. The developed backscatter X-ray security scanner is expected to provide improved detection efficiency for thin objects and/or illicit organic materials compared to a transmission-based X-ray imaging system.

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Depth discrimination method based on a multirow linear array detector for push-broom Compton scatter imaging

Liu

Zhang

et al. 2013

Applied Radiation and Isotopes

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Detection of buried landmine with X-ray backscatter technique

Cited by 12 publications

References 2 publications

Investigations of energy dependence of saturation thickness of multiply backscattered gamma photons in elements and alloys - an inverse matrix approach

Investigations of energy dependence of saturation thickness of multiply backscattered gamma photons in elements and alloys - an inverse matrix approach

Development of prototype backscatter X-ray security scanner for luggage inspection

Depth discrimination method based on a multirow linear array detector for push-broom Compton scatter imaging

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