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Quantitative phase contrast X-ray tomography of aluminium metal matrix composite
Appl Radiat Isot. 2023 Dec 16;204:111149. doi: 10.1016/j.apradiso.2023.111149. Online ahead of print.ABSTRACTThe quantitative assessment of micro-structure and load-induced damages in Al-SiC metal matrix composites (MMC) is important for its design optimization, performance evaluation and structure-property correlation. X-ray Phase contrast micro-tomography is potentially used for evaluation of its 3 dimensional micro-structure manifested in the form of voids, cracks, embedded particles, and load-induced damages. However, the contrast between Al matrix and SiC particles is insufficient for their clear morphological identif...
Source: Applied Radiation and Isotopes - December 22, 2023 Category: Radiology Authors: Ashish K Agrawal Chiradeep Gupta Balwant Singh Yogesh Kashyap Mayank Shukla Source Type: research

Fast neutron induced reaction cross sections on natural manganese and tantalum
Appl Radiat Isot. 2023 Dec 15;204:111150. doi: 10.1016/j.apradiso.2023.111150. Online ahead of print.ABSTRACTThe cross sections for the 55Mn(n,2n)54Mn, 181Ta(n,2n)180gTa, and 181Ta(n,p)181Hf reactions were measured to be 705.1 ± 26.1 mb at 14.0 MeV, 1362.7 ± 87.2 mb at 13.6 MeV, and 2.31 ± 0.09 mb at 13.6 MeV, respectively, by using an off-line γ-ray spectroscopic technique. The neutrons were produced via the 3H(d,n)4He reaction. The monitor reactions 27Al(n,α)24Na and 93Nb(n,2n)92mNb were used for neutron flux determination. The results from the present work were compared with those of the literature and the evaluate...
Source: Applied Radiation and Isotopes - December 21, 2023 Category: Radiology Authors: G Tian B Liu Z Chen F Shi R Han H Sun Z Zhang Q Li P Luo Source Type: research

Synthesis, photo- and thermo-luminescent properties of Mg 2 P 2 O 7 :Tm 3+ phosphors
Appl Radiat Isot. 2023 Dec 15;204:111148. doi: 10.1016/j.apradiso.2023.111148. Online ahead of print.ABSTRACTIn this work, both undoped and Thulium (Tm3+) doped (0.3-10 mol%) magnesium pyrophosphate (Mg2P2O7) powders were synthesized by the solvent evaporation method to study their photo-and thermoluminescent properties. Two crystalline phases were observed in the powders by X-Ray diffraction (XRD), the main phase being Mg2P2O7 and the second one thulium phosphate (TmPO4). The superficial morphology was analyzed by scanning electron microscopy (SEM), which revealed that the powders are agglomerates with an undefined form a...
Source: Applied Radiation and Isotopes - December 21, 2023 Category: Radiology Authors: J E Tenopala J Roman-Lopez I B Lozano J I Guzman-Casta ñeda J A I Diaz-Gongora G Alarc ón-Flores Source Type: research

Establishment of a local diagnostic reference level for computed tomography chest and abdomen in two different cities in Saudi Arabia
CONCLUSION: Hospital 'A' irradiated patients with a higher dose for the abdomen exam than Hospital 'T', but both hospitals agreed on the amount of radiation dose received by patients for chest imaging. The proposed LDRL for two examinations was less than the DRL obtained from the literature.PMID:38113663 | DOI:10.1016/j.apradiso.2023.111147 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - December 19, 2023 Category: Radiology Authors: Amna Mohamed Ahmed Alamin Musa Afaf Medani Mustafa Mahmoud Hamid Osman Mohammed Elsamani Samih Kajoak Salem Saeed Alghamdi Abdulrahman Tajaldeen Mohamed Y Hanfi Mayeen Uddin Khandaker Source Type: research

Liver cancer: A geometric approach to fractals and scaling analysis
Appl Radiat Isot. 2023 Nov 25;204:111123. doi: 10.1016/j.apradiso.2023.111123. Online ahead of print.ABSTRACTIn the study of liver cancer, invasive techniques such as computed tomography (CT) and magnetic resonance imaging (MRI) are used. In the present work, an in vivo 3D study will be carried out using MRI and CT images, using scaling dynamics, that is, calculating critical exponents of local roughness and fractal dimension. The results obtained for stages IA, IIA, and IIIA in liver cancer correspond to what was proposed by F. Family and T. Vicsek (1991).PMID:38113664 | DOI:10.1016/j.apradiso.2023.111123 (Source: Applied...
Source: Applied Radiation and Isotopes - December 19, 2023 Category: Radiology Authors: Francisco Torres-Hoyos Fernando Hern ández-Ortega Rub én Baena-Navarro Jhon Pinedo-L ópez Source Type: research

Radiation Shielding efficiency of lead-tungsten-boron glasses with Sb, Al, and Bi against gamma, neutron and charge particles
We report on newly developed nuclear shielding glass system based on lead-tungsten-boron (PWB) for radiation applications against photon, neutron and charge particles. This newly developed system contains also different additions, in low concentrations, such as Sb, Al and Bi. The gamma/photon shielding performance was tested by using FLUKA Monte Carlo. Moreover, the shielding efficiency of the present system is examined against charged particles (light and heavy ones) and neutrons. The highest gamma/photons attenuation is observed in the lowest incident energy and this is at the region of the photoelectric absorption. We a...
Source: Applied Radiation and Isotopes - December 17, 2023 Category: Radiology Authors: Khadijah Mohammedsaleh Katubi Raed A Alsulami Mubarak M Albarqi Z A Alrowaili Imen Kebaili V P Singh M S Al-Buriahi Source Type: research

Optimization and characterization of a coincidence beta-ray spectrometer
Appl Radiat Isot. 2023 Dec 12;204:111144. doi: 10.1016/j.apradiso.2023.111144. Online ahead of print.ABSTRACTAimed at beta spectrometry and dosimetry for mixed beta-gamma fields, a Si-plastic scintillator coincidence beta-ray spectrometer has been developed. The spectrometer collects pure beta-ray spectra by rejecting the gamma-ray detection events through coincidence. Both pulse height and arrival time of each detection event were recorded in list mode by a compact digital processing system. Spectral measurements were carried out using mixed beta-gamma fields from 90Sr/90Y and 137Cs sources for various beta and gamma coun...
Source: Applied Radiation and Isotopes - December 17, 2023 Category: Radiology Authors: Ruoyu Sun Jovica Atanackovic Andrei R Hanu Xingzhi Cheng Soo Hyun Byun Source Type: research

Defect detection enhancement using Gaussian Sparse Models
In this study, a method based on Gaussian mixture models was implemented and applied to radiographs of welded objects to improve visualization and detectability. In the Sparse Coding and Gaussian Scale Mixture method (SSC-GSM), the local image patches are described as a mixture of Gaussian distributions. Given the different levels of noise in the individual images, the background was determined and subtracted from each original image. The results show that the proposed techniques can maintain and improve the edge information in radiographs and defective regions. The density of pixels along the analyzed profile lines has yi...
Source: Applied Radiation and Isotopes - December 15, 2023 Category: Radiology Authors: Amir Movafeghi Mahdi Mirzapour Effat Yahaghi Source Type: research

A comparative study of EM-CCD and CMOS cameras for particle ion trajectory imaging
In conclusion, our findings suggest that a cooled CMOS camera could serve as a viable alternative for imaging particle ion trajectories.PMID:38101006 | DOI:10.1016/j.apradiso.2023.111143 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - December 15, 2023 Category: Radiology Authors: Seiichi Yamamoto Masao Yoshino Kohei Nakanishi Katsunori Yogo Kei Kamada Akira Yoshikawa Jun Kataoka Source Type: research