Modern Methods of Neutron Radiography and Tomography in Studies of the Internal Structure of Objects

Phase Composition and Its Spatial Distribution in Antique Copper Coins: Neutron Tomography and Diffraction Studies

“…The neutron tomography experiments were performed at the neutron radiography and tomography facility [ 29 , 30 ] at the IBR-2 high-flux pulsed reactor. A set of neutron radiography images was collected by a detector system based on a high sensitivity camera with a Hamamatsu CCD chip [ 15 ]. The tomography experiments were performed with a rotation step of 0.5°; the total number of measured radiography projections was 360.…”

“…The 3D volume data of voxels are the essence of the spatial distribution of values of the neutron attenuation coefficients inside the sample volume. Attenuation of the neutron beam corresponds to scattering and absorption losses inside the material [ 15 ], depending on the composition of the studied object. The VGStudio MAX 2.2 software of Volume Graphics (Heidelberg, Germany) were used for the visualization and analysis of reconstructed 3D data.…”

“…Currently, coins are being intensely investigated by means of non-destructive physical methods, such as traditional techniques like metallography or X-ray diffraction [ 1 , 3 , 9 ]. In this context, we should also mention the neutron radiography [ 10 , 11 , 12 ] and neutron diffraction [ 12 , 13 , 14 ] methods as relatively modern structural non-destructive experimental approaches [ 1 , 15 , 16 ]. The fundamental difference in nature of neutron interaction with matter compared to X-rays provides additional benefits to neutron methods, including sensitivity to light elements, a notable difference in contrast between isotopes and high penetration effect through metals or heavy elements.…”

Structural studies of the brass ingots from the Shcherbet historical complex of the Lower Kama region: neutron diffraction and tomography studies

“…To obtain data on the internal structure of the ingots, studies were carried out at a specialized experimental station for neutron radiography and tomography [15, 16] at channel 14 of the IBR-2 pulsed reactor. Neutron radiographic images of objects were obtained using a detector system based on a 6 LiF/ZnS scintillation screen with image registration by a highly sensitive video camera with HAMAMATSU CCD chip [17]. To study the internal structure of archaeological objects, a number of neutron radiographic experiments were conducted, the result of which was a set of 360 angular projections of the objects under study, with a rotational step of 0.5 • .…”

Neutron Tomography Studies of Two Lamprophyre Dike Samples: 3D Data Analysis for the Characterization of Rock Fabric

“…From this point of view, X-ray and neutron tomography methods can, potentially, provide a full 3D picture of the spheroidal texture, expressed by spatial distribution, particle morphology and shape orientation distribution of different kinds of inclusions inside the dike volume. It has been shown [ 10 , 11 , 12 , 13 ] that neutron radiography and tomography are efficient methods in studying the internal structure of different igneous and metamorphic rocks, as well as construction and archeological materials. In the case of rock material, the high penetration ability of neutrons, as compared to X-ray, allows one to measure rather large volumes, while high contrast between hydrous and anhydrous minerals in neutron images [ 10 , 14 ] provides the necessary conditions for phase segmentation.…”