Images obtained by neutron transmission measurement using time-of-flight method

Kiyanagi, Yoshiaki; Mizukami, K.; Kamiyama, Takashi; Hiraga, Fujio; Iwasa, H.

doi:10.1016/j.nima.2005.01.155

Cited by 30 publications

(18 citation statements)

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“…[91][92][93] Whether it is for application in experiments at the CANS itself or as a part of an instrument at a larger neutron sources, a CANS is definitely a suitable environment for testing new detector concepts. For instance, a number of detector technologies were developed over the years at HUNS, including 2D position-sensitive neutron detectors, [94][95][96][97][98][99] a wavelength-shifting fiber detector, [99] direct-readout pixel-type detectors, [98,100] a boron-type GEM detector, [101] and a neutron image intensifier. [101] A neutron resonance absorption spectroscopy system is also available at HUNS [102] which uses lithium-glass scintillator pixel-type detectors for neutron absorption spectrum recording and BaF2 scintillation detectors for prompt gamma-ray measurements.…”

Section: Neutron Detectorsmentioning

confidence: 99%

“…Bertsche [177] considered alternative 99 Mo-producing reactions using low-and high-energy accelerators. Dovbnya et al [178] investigated the 98 Mo(n,) 99 Mo 99m Tc reaction and speculated on the feasibility of producing the 99m Tc radioisotope using a neutron generator of a thermal-neutron flux ~10 2 n/cm 2 /s. Nagai et al [179,180] exploited the substantial cross section of the 100 Mo(n, 2n) 99 Mo reaction in the neutron energy range of 12-17 MeV (~1.5 b) and demonstrated the production of 79-GBq/g specific activity of 99 Mo after irradiating an enriched 100 Mo target for 198 h with a 14-MeV neutron flux of ~10 13 n/cm 2 /s.…”

Section: Mo/ 99mmentioning

confidence: 99%

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Research opportunities with compact accelerator-driven neutron sources

et al. 2016

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Since the discovery of the neutron in 1934 neutron beams have been used in a very broad range of applications, As an aging fleet of nuclear reactor sources is retired the use of compact accelerator-driven neutron sources (CANS) are becoming more prevalent. CANS are playing a significant and expanding role in research and development in science and engineering, as well as in education and training. In the realm of multidisciplinary applications, CANS offer opportunities over a wide range of technical utilization, from interrogation of civil structures to medical therapy to cultural heritage study. This paper aims to provide the first comprehensive overview of the history, current status of operation, and ongoing development of CANS worldwide. The basic physics and engineering regarding neutron production by accelerators, target-moderator systems, and beam line instrumentation are introduced, followed by an extensive discussion of various evolving applications currently exploited at CANS.

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Section: Neutron Detectorsmentioning

confidence: 99%

Section: Mo/ 99mmentioning

confidence: 99%

Research opportunities with compact accelerator-driven neutron sources

et al. 2016

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“…Owing to large incoherent scattering from hydrogen, cold and thermal neutron scattering cross-sections for these materials are dominated by the motion of hydrogen. Thus, any variations of the total neutron cross-section from bulk water, which could be measured by neutron time-of-flight (TOF) imaging (Kardjilov et al, 2003;Kiyanagi et al, 2005), may provide information on the dynamical state of water. Such use of the neutron imaging may bring a new possibility of the nondestructive inspection for water-containing materials.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics analysis of incoherent neutron scattering from light water via the Van Hove space–time self-correlation function with a new quantum correction

Abe

Tasaki

2015

Annals of Nuclear Energy

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“…Energy-selective neutron radiography using pulsed-neutron sources and time-of-flight (TOF) spectroscopy are recognized as useful techniques for the observation of material textures, atomic distributions, and magnetic fields [1,2]. In pulsed-neutron imaging, high-speed cameras are used to obtain time-resolved transmission images and, at the NOBORU beam line in the J-PARC MLF, neutron resonance absorption imaging was successfully demonstrated experimentally [3].…”

Section: Introductionmentioning

confidence: 99%

Super-Resolution Processing for Pulsed Neutron Imaging System Using a High-Speed Camera

Ishizuka

Kai²,

Shinohara³

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

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Super-resolution and center-of-gravity processing improve the resolution of neutron-transmitted images. These processing methods calculate the center-of-gravity pixel or sub-pixel of the neutron point converted into light by a scintillator. The conventional neutron-transmitted image is acquired using a high-speed camera by integrating many frames when a transmitted image with one frame is not provided. It succeeds in acquiring the transmitted image and calculating a spectrum by integrating frames of the same energy [3]. However, because a high frame rate is required for neutron resonance absorption imaging, the number of pixels of the transmitted image decreases, and the resolution decreases to the limit of the camera performance. Therefore, we attempt to improve the resolution by integrating the frames after applying super-resolution or center-of-gravity processing. The processed results indicate that center-of-gravity processing can be effective in pulsed-neutron imaging with a high-speed camera. In addition, the results show that super-resolution processing is effective indirectly. A project to develop a real-time image data processing system has begun, and this system will be used at J-PARC in JAEA.

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Images obtained by neutron transmission measurement using time-of-flight method

Cited by 30 publications

References 1 publication

Research opportunities with compact accelerator-driven neutron sources

Research opportunities with compact accelerator-driven neutron sources

Molecular dynamics analysis of incoherent neutron scattering from light water via the Van Hove space–time self-correlation function with a new quantum correction

Super-Resolution Processing for Pulsed Neutron Imaging System Using a High-Speed Camera

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