Reconstruction of Material Elemental Composition Using Fast Neutron Resonance Radiography

Mor, I.; Dangendorf, V.; Reginatto, Marcel; Kaufmann, Frank; Vartsky, D.; Brandis, Michal; Bar, Doron; Goldberg, M.B.

doi:10.1016/j.phpro.2015.07.043

Cited by 22 publications

(9 citation statements)

References 7 publications

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“…These methods, however, use only neutron counting, and do not 2 exploit the spectral information of the transmitted neutron flux. Additional work by others has showing that precise reconstructions of neutron energy can allow for resonance radiography applications which allow for the determination of carbon, oxygen, and nitrogent contents of the cargo [13,14,15,16]. Our work extends this by showing that the analysis of the neutron deposited energy alone, which results in a much simpler measurements, can provide information about the hydrogenous content.…”

Section: Introductionsupporting

confidence: 56%

Hydrogenous content identification in heterogeneous cargoes via multiple monoenergetic neutron radiography

Rahon¹,

Danagoulian²

2020

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Introductionsupporting

confidence: 56%

Hydrogenous content identification in heterogeneous cargoes via multiple monoenergetic neutron radiography

Rahon¹,

Danagoulian²

2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…Ultra-intense γ and neutron beams are of interest in laboratory astrophysics 1 – 3 , high energy density plasma physics 4 – 9 , and applications e.g. in biology, medicine, and material science 10 – 16 .…”

Section: Introductionmentioning

confidence: 99%

Forward-looking insights in laser-generated ultra-intense γ-ray and neutron sources for nuclear application and science

et al. 2022

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Ultra-intense MeV photon and neutron beams are indispensable tools in many research fields such as nuclear, atomic and material science as well as in medical and biophysical applications. For applications in laboratory nuclear astrophysics, neutron fluxes in excess of 1021 n/(cm2 s) are required. Such ultra-high fluxes are unattainable with existing conventional reactor- and accelerator-based facilities. Currently discussed concepts for generating high-flux neutron beams are based on ultra-high power multi-petawatt lasers operating around 1023 W/cm2 intensities. Here, we present an efficient concept for generating γ and neutron beams based on enhanced production of direct laser-accelerated electrons in relativistic laser interactions with a long-scale near critical density plasma at 1019 W/cm2 intensity. Experimental insights in the laser-driven generation of ultra-intense, well-directed multi-MeV beams of photons more than 1012 ph/sr and an ultra-high intense neutron source with greater than 6 × 1010 neutrons per shot are presented. More than 1.4% laser-to-gamma conversion efficiency above 10 MeV and 0.05% laser-to-neutron conversion efficiency were recorded, already at moderate relativistic laser intensities and ps pulse duration. This approach promises a strong boost of the diagnostic potential of existing kJ PW laser systems used for Inertial Confinement Fusion (ICF) research.

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“…13B) but permits better resolution ratio-images. A much more elaborate approach, using several energies has been used successfully by the PTB/Soreq group [29] and will be tried using our simulation data.…”

Section: Simulation Of Radiographic Imageselemental Differentiationmentioning

confidence: 99%

A comprehensive simulation study of a Liquid-Xe detector for contraband detection

Israelashvili¹,

Cortesi²,

Vartsky³

et al. 2015

J. Inst.

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Recently, a new detector concept, for combined imaging and spectroscopy of fast-neutrons and gamma was presented. It encompasses a liquid-xenon (LXe) converter-scintillator coupled to a UV-sensitive gaseous Thick Gas Electron Multiplier (THGEM)-based imaging photomultiplier (GPM).In this work we present and discuss the results of a systematic computer-simulation study aiming at optimizing the type and performance of LXe converter. We have evaluated the detector spectral response, detection efficiency and spatial resolution for gamma-rays and neutrons in the energy range of 2-15 MeV for 50 mm thick converters consisting of plain LXe volume and LXe-filled capillaries, of Teflon, Polyethylene or hydrogen-containing Teflon (Tefzel). Neutron detection efficiencies for plain LXe, Teflon-capillaries and Tefzel-capillaries converters were about 20% over the entire energy range. In polyethylene capillaries converters the neutron detection efficiency was about 10% at 2 MeV and increased up to about 20% at 14 MeV. Detection efficiencies of gammas in Teflon, Tefzel and polyethylene converters were ~35%. The plain-LXe converter provided the highest gamma-ray detection efficiency, of ~40-50% for 2-15 MeV energy range. Optimization of LXe-filled Tefzel capillary dimensions resulted in spatial resolution of ~1.5mm (FWHM) for neutrons and up to 3.5 mm (FWHM) for gamma-rays.Simulations of radiographic images of various materials using two discrete energy gammarays (4.4 MeV and 15.1 MeV) and neutrons in broad energy range (2-10 MeV) were performed in order to evaluate the potential of elemental discrimination.

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Reconstruction of Material Elemental Composition Using Fast Neutron Resonance Radiography

Cited by 22 publications

References 7 publications

Hydrogenous content identification in heterogeneous cargoes via multiple monoenergetic neutron radiography

Hydrogenous content identification in heterogeneous cargoes via multiple monoenergetic neutron radiography

Forward-looking insights in laser-generated ultra-intense γ-ray and neutron sources for nuclear application and science

A comprehensive simulation study of a Liquid-Xe detector for contraband detection

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