New neutron imaging facility at the WWR-SM reactor: Design and first results

Abdurakhimov, B. A.; Tashmetov, M. Yu.; Yuldashev, B. S.; Кичанов, С. Е.; Лукин, Е. В.; Козленко, Д. П.; Kulikov, S.; Швецов, В. Н.; Ismatov, N.B.; Saidov, A.R.; Normurodov, A. B.; Rutkauskas, A. V.

doi:10.1016/j.nima.2020.164959

Cited by 8 publications

(8 citation statements)

References 15 publications

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“…The internal structure and spatial distribution of phases in the volume of coins were studied by neutron tomography method at the neutron imaging experimental facility [25] on the 5 th horizontal channel of the WWR-SM nuclear reactor (INP AS RUz, Tashkent, Republic of Uzbekistan). A complete set of neutron radiographic images has been registered by the detector system based on a 6 LiF/Zn(Cd)S :Ag scintillation screen and a high-sensitive ProLine PL-09000 CCD camera (Finger Lakes Instrumentation, USA).…”

Section: Methodsmentioning

confidence: 99%

Non-destructive structural studies of coins from the Uzundara Fortress using X-ray diffraction and neutron tomography

Tashmetov

Yuldashev

Adizov

et al. 2022

Eurasian j. phys. funct. mater.

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The copper Heliocles coin and two silver Demetrius coins dated to the II century BC from the archaeological works of the Uzundara fortress of the Greco-Bactrian Kingdom were studied using non-destructive structural diagnostics methods. The phase analysis of the coins was performed using the X-ray diffraction method. Also, the spatial distribution of the internal components of the coins was investigated by neutron imaging methods. It has been established that the dominant phase of the Heliocles coin is copper, however, a small volume of patina was found. It is mainly represented by tenorite CuO phase. The neutron tomography method indicates a deep penetration of tenorite into the thickness of the coin, and its volume fraction can reach 10% of the total volume. Two Demetrius coins consist entirely of silver. The complex profile of coins due to the features of a coinage was reconstructed. The phase composition, the content of the composite phases and three-dimensional models of the studied coins were obtained.

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Section: Methodsmentioning

confidence: 99%

Non-destructive structural studies of coins from the Uzundara Fortress using X-ray diffraction and neutron tomography

Tashmetov

Yuldashev

Adizov

et al. 2022

Eurasian j. phys. funct. mater.

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“…The studies were carried out on a neutron radiography and tomography unit installed on the fifth horizontal channel of the WWR-SM reactor of the INP AN RUz with a neutron flux of ~9×10 6 neutrons/cm 2 s and a resolution of ~ 280 µm (L/d~600) [32]. In neutron tomography, a controlled goniometer rotates the sample 180 degrees during an experiment [32].…”

Section: Objects Of Study and Experimental Techniquementioning

confidence: 99%

“…The 6LiF/Zn(Cd)S:Ag screen is used as a scintillation detector to convert neutrons passing through the sample into visible light with a wavelength of 380 nm to 760 nm. The highly reflective light emitted by the scintillator using mirrors 200×280×3 mm is directed into a ProLine PL09000 CCD camera [32]. The rotation step was 0.45°, the total number of measured projections was 401.…”

Section: Objects Of Study and Experimental Techniquementioning

confidence: 99%

Studies of the internal structure of electrical devices and the archaeological heritage by the method of neutron radiography and tomography

Tashmetov

Yuldashev

Adizov

et al. 2021

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The paper presents the results of the study of a series of objects of electrical devices and archaeological heritage by the method of neutron radiography and tomography (VL-10 diode, spark plug, bell, ancient ring, stone). It is shown that the method of neutron radiography and tomography reliably works on samples made of various materials. Neutron radiographic and tomographic studies of the VL-10 diode gave an idea of the internal structure of the diode. Experiments with spark plugs have revealed the causes of its faulty function. According to the tomographic results of the bell, ring and stone, the heterogeneous areas in the internal volume of these objects were revealed. The results obtained are the basis for further research in the field of archaeological heritage and technical devices for special purposes.

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“…As can be observed the ZnS:Ag/LiBO/PDMS scintillator can easily reach a small curvature Thermal neutron response of the LiBO/ZnS:Ag-based scintillators. Six different samples of ZnS:Ag/LiBO/PDMS scintillators were tested using the neutron flux generated by the 7 Li(p,n) 7 Be reaction (proton energy ∼ 5.5 MeV) at the Van de Graaff accelerator at the Laboratori Nazionali di Legnaro-INFN. The mono-energetic fast neutrons ( ∼ 3.8 MeV at 0 • ) were moderated by surrounding the detector assembly with a few centimeters of polyethylene (in Ref.…”

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confidence: 99%

“…(1) www.nature.com/scientificreports/ Given that the ratio of the number of 10 B and 6 Li nuclei in the LiBO is 2:1, and that the (n th ,α ) reaction crosssection for the 10 B is approximately four times higher, it is reasonable to assume that the majority of the thermal neutron events recorded are due to capture reaction on 10 B. Nevertheless, the signals induced by neutron capture on the 10 B are expected to have smaller amplitudes (and also smaller integrals) than those induced by neutron captures on 6 Li, because the signal in the case of 10 B is primarily made up of alpha particle induced scintillation ( ∼1.5 MeV), whereas the scintillation signal induced by 7 Li is highly quenched. Specifically, from SEM images (see Supplementary Fig.…”

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confidence: 99%

Novel flexible and conformable composite neutron scintillator based on fully enriched lithium tetraborate

Pino

Delgado

Carturan

et al. 2023

Sci Rep

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Thermal neutron detection is a key subject for nuclear physics research and also in a wide variety of applications from homeland security to nuclear medicine. In this work, it is proposed a novel flexible and conformable composite thermal neutron scintillator based on a fully enriched Lithium Tetraborate preparation ($$^{6}$$ 6 Li$$_2^{10}$$ 2 10 B$$_4$$ 4 O$$_7$$ 7 ) combined with a phosphorescent inorganic scintillator powder (ZnS:Ag), and is then distributed into a polydimethylsiloxane matrix. The proposed scintillator shows a good neutron detection efficiency (max. $$\sim$$ ∼ 57% with respect to the commercial EJ-420), an average light output of $$\sim$$ ∼ 9000 ph/neutron-capture, a remarkable insensitivity to $$\gamma$$ γ -rays (Gamma Rejection Ratio <10$$^{-11}$$ - 11 ), and an extraordinary flexibility, so as to reach extremely small curvature radii, down to 1.5 mm, with no signs of cracking or tearing. Its characteristics make it suitable to be employed in scenarios where non-standard geometries are needed, for example, to optimize the detector performance and/or maximize the detection efficiency. Finally, the response of a hybrid detector made of a plastic scintillator, wrapped with the proposed scintillator, coupled to a silicon photomultiplier array is described, and the excellent discrimination between $$\gamma$$ γ -rays, fast and thermal neutrons resulting from data processing is demonstrated.

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New neutron imaging facility at the WWR-SM reactor: Design and first results

Cited by 8 publications

References 15 publications

Non-destructive structural studies of coins from the Uzundara Fortress using X-ray diffraction and neutron tomography

Non-destructive structural studies of coins from the Uzundara Fortress using X-ray diffraction and neutron tomography

Studies of the internal structure of electrical devices and the archaeological heritage by the method of neutron radiography and tomography

Novel flexible and conformable composite neutron scintillator based on fully enriched lithium tetraborate

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