Applied Radiation and Isotopes This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Defects and magnetic studies of nanocrystalline cobalt substituted manganese ferrite probed by positron annihilation lifetime spectroscopy and magnetic measurement
Appl Radiat Isot. 2024 Feb 7;206:111199. doi: 10.1016/j.apradiso.2024.111199. Online ahead of print.ABSTRACTCobalt substituted manganese ferrite nanoparticles, Mn1-xCoxFe2O4 (x = 0.0, 0.1, 0.25 and 0.5) were prepared by co-precipitation procedure. The structural and magnetic properties of ferrite nanoparticles were measured by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and vibrating sample magnetometry (VSM). The lattice constant and cation distribution of ferrite samples were extracted from XRD patterns using the software package MAUD. The crystallite size of the samples was determined by...
Source: Applied Radiation and Isotopes - February 22, 2024 Category: Radiology Authors: Bahman Zare Khosroabadi Zohreh Kargar Hossein Moeini Source Type: research

Temperature drift during environmental radiation monitoring and its unfolding
Appl Radiat Isot. 2024 Feb 1;206:111210. doi: 10.1016/j.apradiso.2024.111210. Online ahead of print.ABSTRACTThe aim of the presented paper is to examine the temperature drift and its unfolding for an environmental monitor equipped with a LaBr3(Ce) detector. It is known that temperature could influence energy, shape, and efficiency calibration. Consequently, when ambient temperature changes, the full energy absorption peak moves in the resulting spectrum. Research consists of experimental and analytical parts. During research in the climatic chamber, the dependence on temperature of energy, shape, and efficiency calibration...
Source: Applied Radiation and Isotopes - February 21, 2024 Category: Radiology Authors: Łukasz Modzelewski Bart łomiej Kliś Łukasz Mazur Joanna Lema ńska Kamila Kempny Maciej Norenberg Alicja Jakubowska Anna Kawalec Karol Wiatr Pawe ł Krajewski S ławomir Jednoróg Source Type: research

Designing lightweight neutron absorbing composites using a comprehensive absorber areal density metric
In this study, analytical models and a more physically representative simulation evaluated the penalty to neutron absorbing performance due to neutron channeling between large absorbing particles. Models and simulation agreed that B4C particles smaller than 100μm and especially those smaller than 10μm did not cause excessive neutron channeling. A more comprehensive neutron absorbing composite design metric - boron-10 equivalent areal density, which considers the particle size penalty and the matrix contribution to absorptivity - was introduced and used to estimate lightweighting via matrix substitution. Calculations usin...
Source: Applied Radiation and Isotopes - February 21, 2024 Category: Radiology Authors: Andrew O'Connor Cheol Park Wesley E Bolch Andreas Enqvist Michele V Manuel Source Type: research

Integrated absolute full energy peak efficiency: A measure of photon registration efficiency
Appl Radiat Isot. 2024 Feb 13;206:111237. doi: 10.1016/j.apradiso.2024.111237. Online ahead of print.ABSTRACTIntegrated absolute full energy peak efficiency (IAFEPE) is a measure of photon registration efficiency using the γ-ray spectrometry method. We have derived appropriate formulas and theoretical explanations of IAFEPE for the first time. IAFEPE is a definite integral (Riemann integral) of the photon registration efficiency function within the detection energy range. IAFEPE, along with associated quantities such as mass integrated absolute full energy peak efficiency and surface integrated absolute full energy peak e...
Source: Applied Radiation and Isotopes - February 18, 2024 Category: Radiology Authors: Slawomir Jednorog Bartlomiej Klis Kamil Szewczak Source Type: research

Dual-isotope imaging method for Actinium-225 and Bismuth-213 using alpha imaging detector
In this study, we describe and validate a spectrum decomposition method for dual-isotope imaging of 225Ac and 213Bi using an alpha imaging detector. We implemented an experiment to demonstrate the feasibility of using the alpha imaging detector to obtain distribution images using therapeutic amounts of 225Ac. In addition, we designed and conducted a Monte Carlo simulation under realistic conditions based on the experimental results to evaluate the spectrum decomposition method for dual-isotope imaging. The alpha imaging detector exhibited a detection efficiency of 18.5% and an energy resolution of 13.4% at 5.5 MeV. In the ...
Source: Applied Radiation and Isotopes - February 17, 2024 Category: Radiology Authors: Jong-Guk Kim Guna Kim Hyun Su Lee Byoungsoo Kim Il-Han Lim Kwangil Kim Kyochul Lee Source Type: research

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