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Method and equipment for estimation activity nuclides in samples of finite dimensions
This study presents a method of measuring the activity of a specific radionuclide 234mPa in samples placed in bulk transport containers under changing background conditions. The method makes it possible to measure specific activity of 234 mPa in objects without the need for sampling. The change in the effective sample volume limited by the surfaces of the containers is considered depending on the density of the measured material and the energy of gamma radiation of the radionuclide. The high sensitivity of scintillation detector, supplemented by adequate Monte Carlo simulation, allows spectrum measurements to be taken in a...
Source: Applied Radiation and Isotopes - February 16, 2024 Category: Radiology Authors: A Zhukouski E Levonyck N Sugai H Sugai M Mogi A Khruschinski S Kutsen Source Type: research

Investigations on α-Al 2 O 3 thermoluminescence for dosimetry of high energy photons
This article presents a study of high-energy X-ray dosimetry carried out at CEA Gramat. In this study, we are interested in alumina as a new thermoluminescent dosimeter. We performed several pre-irradiation protocols to use alpha-alumina as a dosimeter over doses ranging from 0.09 Gy to 350/400 Gy in order to obtain calibration curve for these different protocols.PMID:38364611 | DOI:10.1016/j.apradiso.2024.111238 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - February 16, 2024 Category: Radiology Authors: Antoine Lahaie Gilles Assaillit Marc Gaillardin Source Type: research

Comparison between the theoretical and experimental values of transition rate B(E2), deformation parameters and intrinsic quadrupole moments for some Ti isotopes
In this study, electric quadrupole transition properties in some even-even Ti nuclei have been investigated by using different effective charges and interactions. In this respect, B(E2) transition rates, deformation parameters and intrinsic quadrupole moments have been calculated. In calculations, NuShellX code has been used to calculated one body matrix elements (OBDM). Theoretical calculations on these quantities have been compared with the experimental results, and it has been seen that theoretical values obtained by using the kb3 and vpnp interactions and Bohr Mottelson (B-M) and Standard (S-T) effective charges are cl...
Source: Applied Radiation and Isotopes - February 16, 2024 Category: Radiology Authors: Ahmed H Ali Naz T Jarallah Sergey V Bedenko Hanaa A Alshammar Source Type: research

Hardware algorithm design and validation for nuclear radiation imaging based on Monte Carlo simulation
This study is divided into two parts: simulation and hardware algorithm. In the simulation part, precise simulation of scintillation light transport in a crystal was achieved using the GEANT4 Monte Carlo simulation toolkit. A LaBr3(Ce) detector system was simulated by digitizing photon interactions. In the hardware algorithm part, a positioning algorithm based on a fully connected neural network was implemented and optimized using a heterogeneous distributed storage approach. The system validated and assessed the FPGA-based neural network gamma camera positioning algorithm, demonstrating significant consistency with comput...
Source: Applied Radiation and Isotopes - February 16, 2024 Category: Radiology Authors: Kefeng Zou Lei Wang Wei Lu Penglei Feng Junqiao Chen Haoxuan Li Source Type: research

Neutron pumping of active medium formed by gadolinium isotopes 155 Gd and 156 Gd pair: A feasibility study
Appl Radiat Isot. 2024 Feb 7;206:111232. doi: 10.1016/j.apradiso.2024.111232. Online ahead of print.ABSTRACTThe possibility of creating technical means for controlling the processes of accumulation and conversion of the energies of thermal and epithermal neutrons into the energy of monoenergetic photons due to neutron pumping of an active medium consisting of nuclei with long-lived isomeric states was studied in this work. The system under study consisted of an external pulse-periodic source of deuterium-tritium neutrons (PSN) and a subcritical blanket, which included a variable neutron-collimation beam-shaping assembly (v...
Source: Applied Radiation and Isotopes - February 12, 2024 Category: Radiology Authors: Sergey V Bedenko Sergey D Polozkov Alexey S Demin Nima Ghal-Eh Faezeh Rahmani Hector Rene Vega-Carrillo Source Type: research

Synthesis, characterization and thermoluminescence of MgO:Li,Tb,Sm phosphor for high dose gamma dosimetry applications
Appl Radiat Isot. 2024 Feb 1;206:111222. doi: 10.1016/j.apradiso.2024.111222. Online ahead of print.ABSTRACTA detailed TL investigation on MgO:Li,Tb,Sm phosphor has been carried out by studying several TL characteristics - TL glow curve structure, dose response, linearity dose behaviour, fading and reproducibility. TL glow curve structure of the phosphor reveals the presence of two TL glow peaks. The main TL glow peak of high intensity is observed at high temperature side i.e. at 162 °C and another peak of low intensity is observed at 316 °C. Further, the effect of dose on TL response of the phosphor has been studied and...
Source: Applied Radiation and Isotopes - February 12, 2024 Category: Radiology Authors: Aayushi Jain Pooja Seth Shruti Aggarwal Source Type: research

A wireless-controlled lab-scale system for automated gamma column scanning and radiotracer applications
We present a novel wireless-controlled lab-scale system for gamma column scanning and radiotracer applications. The system utilizes a microcontroller for wireless movement of the source and detector along vertical and lateral axes. Acquired data is wirelessly transmitted to a handheld device, enabling real-time scan profiles. The system reduces scan duration, manpower involvement, and radiation exposure. Applicability to radiotracer applications, especially residence-time distribution measurements, is demonstrated. Finally, with its expanded scanning area and enhanced flexibility, the system holds potential for providing c...
Source: Applied Radiation and Isotopes - February 11, 2024 Category: Radiology Authors: H K Mutinda M I Kaniu M J Mangala W M Kairu Source Type: research

Characterization of aluminum nitride thin films by ion beam analysis techniques
Appl Radiat Isot. 2024 Jan 28;206:111212. doi: 10.1016/j.apradiso.2024.111212. Online ahead of print.ABSTRACTAlN thin films have been deposited on silicon substrate by vacuum arc discharge technique at different substrate temperatures. The information regarding depth profiling of AlN thin films has been determined by applying both elastic backscattering (EBS) and nuclear reaction analysis (NRA) techniques simultaneously at optimized experimental conditions. Additionally, combined SEM/EDX techniques have been employed to gain further information regarding thickness and composition of the AlN thin films. The Al/N ratio has b...
Source: Applied Radiation and Isotopes - February 10, 2024 Category: Radiology Authors: M S Rihawy B Abdallah A Wassouf W Zetoun Source Type: research

An investigation of neutron shielding and activation performances of four types of concrete for carbon ion therapy facility
This study reveals the shielding and radioactivity issue of carbon ion therapy facilities and is expected to aid in the design or construction of similar facilities.PMID:38340532 | DOI:10.1016/j.apradiso.2024.111233 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - February 10, 2024 Category: Radiology Authors: Yao Yang Fuhong Ma Xirui Zhou Wuyuan Li Youwu Su Chong Xu Bocheng Jiang Source Type: research

Development and establishment of a parallel plate ionization chamber as a transfer standard for measurement of dose to tissue in beta radiation fields
Appl Radiat Isot. 2024 Jan 28;206:111213. doi: 10.1016/j.apradiso.2024.111213. Online ahead of print.ABSTRACTA parallel-plate ionization chamber (PPC) with a nominal volume of 8.16 cm³ was developed based on theoretically simulated design parameters. Its purpose is to serve as a transfer standard for dosimetry in a beta radiation field. The entrance window of the PPC consists of an aluminized Mylar sheet with a thickness of 1.4 mg/cm2. The collecting and guard electrodes are created by applying a graphite coating on a Poly Methyl Methacrylate (PMMA) substrate with a thickness of 5 mm. The nominal sheet resistance of the g...
Source: Applied Radiation and Isotopes - February 10, 2024 Category: Radiology Authors: S Rakshit M S Kulkarni Source Type: research

Temperature-responsive insights: Investigating Eu 3+ and Dy 3+ activated yttrium calcium oxyborate phosphors for structure and luminescence
Appl Radiat Isot. 2024 Feb 2;206:111214. doi: 10.1016/j.apradiso.2024.111214. Online ahead of print.ABSTRACTAn investigation into the luminescent behavior of YCOB (Yttrium Calcium Oxyborate) doped with Eu3+ and Dy3+ ions, synthesized via the combustion method, is presented. The study, employing X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), and Energy-Dispersive X-ray Spectroscopy (EDS) analyses, confirms the structural integrity and purity of the synthesized nanophosphors. An XRD pattern exhibiting distinct crystalline peaks indicates that the dopant ions were successfully integrated into the YCO...
Source: Applied Radiation and Isotopes - February 7, 2024 Category: Radiology Authors: D A Jabali A Y Madkhli G Souadi Ümit H Kaynar M B Coban O Madkhali M Ayvacikli Nasser Amri N Can Source Type: research