A new empirical formula for calculation of (n,3n) cross sections of heavy mass nuclei in the energy region 22-27.5 MeV
Appl Radiat Isot. 2024 Feb 28;207:111259. doi: 10.1016/j.apradiso.2024.111259. Online ahead of print.ABSTRACTIn this paper we want to study (n,3n) reactions using an empirical formula derived on the basis of the statistical model considering reaction Q-value dependence. This formula was obtained by taking into account the exponential dependence on asymmetry parameter (N-Z)/A for neutron-induced reactions in Levkovskii's empirical formula. In addition, the present formula depends also on incident energy En, reaction Q-value and symmetry term (N-Z)2/A. Herein, a new analysis of experimental data of (n,3n) reactions in the en...
Source: Applied Radiation and Isotopes - March 2, 2024 Category: Radiology Authors: Mustafa Yi ğit Mehmet Eraslan Source Type: research
Evaluation of gamma irradiation effects on antioxidant capacity of propolis
Appl Radiat Isot. 2024 Feb 24;207:111254. doi: 10.1016/j.apradiso.2024.111254. Online ahead of print.ABSTRACTThe irradiation effects on antioxidant potential and on content of phenolic compounds of propolis ethanoic extracts were studied. It was found out that gamma treatment of samples with 2 and 10 kGy had a weak decreasing effect on the total phenolic content (TPC), while no change was observed in the propolis irradiated with 5 kGy. The antiradical activity of extracts was assessed by the DPPH free radical scavenging activity evaluated by Electron Paramagnetic Resonance (EPR) spectroscopy. The EPR results were in agreem...
Source: Applied Radiation and Isotopes - March 2, 2024 Category: Radiology Authors: Ralitsa B Mladenova Nikolay Y Solakov Kamelia K Loginovska Source Type: research
A microfluidic route for synthesis of scandium oxide microspheres, their characterization and neutron activation
Appl Radiat Isot. 2024 Feb 20;207:111245. doi: 10.1016/j.apradiso.2024.111245. Online ahead of print.ABSTRACTRadioactive scandium-46 microspheres have applications in mapping flow in a chemical reactor through a technique known as radioactive particle tracking (RPT). In the present study a novel microfluidic method has been developed for synthesis of controlled size scandium oxide microspheres. An inline/in-situ mixing of the scandium precursor and gelling agents was implemented which makes the microfluidic platform amenable for truly continuous operation. Microspheres of size varying from 937 to 666 μm were produced by v...
Source: Applied Radiation and Isotopes - March 2, 2024 Category: Radiology Authors: Jayashree Biswal Nirvik Sen Annie Joseph V K Sharma K K Singh K T Shenoy H J Pant Source Type: research
Performance evaluation of a < sup > 71 < /sup > Ga(n, γ) < sup > 72 < /sup > Ga reaction-based epithermal neutron flux detector at an AB-BNCT device
In this study, a spherical epithermal neutron flux detector using 71Ga(n,γ)72Ga reaction was prototyped. The performance of the detector was experimentally evaluated at an accelerator-based BNCT (AB-BNCT) device developed by Lanzhou University, China. Based on the experimental results and related analysis, we demonstrated that the detector is a reliable tool for the quality assurance of BNCT treatment beams.PMID:38428203 | DOI:10.1016/j.apradiso.2024.111249 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - March 1, 2024 Category: Radiology Authors: Xingcai Guan Huangxin Wu Rui Bai Guanghua Wu Wenliang Yang Wuliang Guo Haixi Wang Yongquan Wang Junliang Du Lu Zhang Long Gu Source Type: research
Performance evaluation of a < sup > 71 < /sup > Ga(n, γ) < sup > 72 < /sup > Ga reaction-based epithermal neutron flux detector at an AB-BNCT device
In this study, a spherical epithermal neutron flux detector using 71Ga(n,γ)72Ga reaction was prototyped. The performance of the detector was experimentally evaluated at an accelerator-based BNCT (AB-BNCT) device developed by Lanzhou University, China. Based on the experimental results and related analysis, we demonstrated that the detector is a reliable tool for the quality assurance of BNCT treatment beams.PMID:38428203 | DOI:10.1016/j.apradiso.2024.111249 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - March 1, 2024 Category: Radiology Authors: Xingcai Guan Huangxin Wu Rui Bai Guanghua Wu Wenliang Yang Wuliang Guo Haixi Wang Yongquan Wang Junliang Du Lu Zhang Long Gu Source Type: research
Design of simulated-gas calibration source and self-attenuation correction methods for radioactive noble gas measurement with HPGe detector
In this study, to achieve accurate measurement of radioactive noble gas and enhance the precision of efficiency calibration, a relatively low-cost and low-density simulated-gas calibration source (SGCS) was produced from polyurethane foam with a density of ρ = 0.098 g cm-3. Using SGCS with a Marinelli beaker geometry, the efficiency calibration was applied to a BE5030, 50.5% relative efficiency HPGe detector in an energy range of 59.54 keV∼1836.06 keV. Then, taking the 81 keV gamma-ray emitted by 133Xe as an example, due to the density difference between the SGCS and the 133Xe gas sample, it is necessary to correct for ...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Shuo Wang Fei Tuo Xiang-Ping Qiu Yang Xiao Jun-Cheng Liang Source Type: research
Airborne < sup > 210 < /sup > Pb, Si, Zn and Pb as tracers for atmospheric pollution in Helsinki metropolitan area
This study analyzed 16070 daily and 608 weekly air filter samples from the Helsinki metropolitan area collected between 1962 and 2005. The aim was to use the Potential Source Contribution Function (PSCF) to determine potential sources of silicon (Si), zinc (Zn), lead (Pb), and radioactive isotope 210Pb. The main sources for Si and Pb were industrial activities, particularly mining, metal industry, and traffic. Common source areas for Zn and 210Pb were identified in the eastern and southeastern parts of the measuring site.PMID:38422941 | DOI:10.1016/j.apradiso.2024.111252 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Eleftheria Ioannidou Stefanos Papagiannis Manousos Ioannis Manousakas Mika Vestenius Konstantinos Eleftheriadis Jussi Paatero Lambrini Papadopoulou Alexandra Ioannidou Source Type: research
A series of high-sensitivity radon detection systems and their applications in nitrogen as well as the boil-off liquid nitrogen measurement
Appl Radiat Isot. 2024 Feb 28;206:111260. doi: 10.1016/j.apradiso.2024.111260. Online ahead of print.ABSTRACTIn modern rare-event search experiments such as neutrino experiments and dark matter search experiments, radon is one of the most important radiation backgrounds since it can emanate from nearly all the materials containing radium and migrate freely in the experiment system. To support the China Dark Matter Experiment (CDEX) at China Jinping Underground Laboratory (CJPL), a series of high-sensitivity radon detection systems with different electrostatic collection chambers were designed, and radon in nitrogen as well...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Fan Wang Hao Wang Zhi Zeng Jinmin Yang Kang Peng Lei Zhang Qiuju Guo Source Type: research
Radiation-induced modification effects in covalent-network glass formers: Phenomenological description within unified configuration-enthalpy model
Appl Radiat Isot. 2024 Feb 24;206:111255. doi: 10.1016/j.apradiso.2024.111255. Online ahead of print.ABSTRACTExternally-induced modification activated by high-energy excitation such as γ-irradiation from 60Co source is analyzed in chalcogenide glasses in terms of radiation-structural and glass-relaxation metastability, at the example of sulphides (including stoichiometric arsenic trisulphide, As2S3) and selenides. Unified configuration-enthalpy model evolving conjugated configuration-coordinate (free energy in dependence on configuration coordinate) and thermodynamic enthalpy (temperature deviations in enthalpy, configura...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Oleh Shpotyuk Mykola Vakiv Andriy Kovalskiy Roman Golovchak Valentina Balitska Mykhaylo Shpotyuk Source Type: research
Investigation of NK cell function against two target hematological cell line using radioactive chromium assay
In this study two hematological cell lines K562 and MDS where used and target and results showed different sensitivity to killing by NK cells separated from healthy volunteers. Results have been shown that MDS release significantly more radioactive chromium indicating higher degree of necrosis during cell culture. In addition, K562 cell line is better target for NK killing in all different E:T ratio in comparison to MDS cell line previously described. Based on this, it is suggested that K562 cells be continues used in the future as better target for investigation NK killing.PMID:38422944 | DOI:10.1016/j.apradiso.2024.11125...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Vladimir Juri šić Source Type: research
Design of simulated-gas calibration source and self-attenuation correction methods for radioactive noble gas measurement with HPGe detector
In this study, to achieve accurate measurement of radioactive noble gas and enhance the precision of efficiency calibration, a relatively low-cost and low-density simulated-gas calibration source (SGCS) was produced from polyurethane foam with a density of ρ = 0.098 g cm-3. Using SGCS with a Marinelli beaker geometry, the efficiency calibration was applied to a BE5030, 50.5% relative efficiency HPGe detector in an energy range of 59.54 keV∼1836.06 keV. Then, taking the 81 keV gamma-ray emitted by 133Xe as an example, due to the density difference between the SGCS and the 133Xe gas sample, it is necessary to correct for ...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Shuo Wang Fei Tuo Xiang-Ping Qiu Yang Xiao Jun-Cheng Liang Source Type: research
Airborne < sup > 210 < /sup > Pb, Si, Zn and Pb as tracers for atmospheric pollution in Helsinki metropolitan area
This study analyzed 16070 daily and 608 weekly air filter samples from the Helsinki metropolitan area collected between 1962 and 2005. The aim was to use the Potential Source Contribution Function (PSCF) to determine potential sources of silicon (Si), zinc (Zn), lead (Pb), and radioactive isotope 210Pb. The main sources for Si and Pb were industrial activities, particularly mining, metal industry, and traffic. Common source areas for Zn and 210Pb were identified in the eastern and southeastern parts of the measuring site.PMID:38422941 | DOI:10.1016/j.apradiso.2024.111252 (Source: Applied Radiation and Isotopes)
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Eleftheria Ioannidou Stefanos Papagiannis Manousos Ioannis Manousakas Mika Vestenius Konstantinos Eleftheriadis Jussi Paatero Lambrini Papadopoulou Alexandra Ioannidou Source Type: research
A series of high-sensitivity radon detection systems and their applications in nitrogen as well as the boil-off liquid nitrogen measurement
Appl Radiat Isot. 2024 Feb 28;206:111260. doi: 10.1016/j.apradiso.2024.111260. Online ahead of print.ABSTRACTIn modern rare-event search experiments such as neutrino experiments and dark matter search experiments, radon is one of the most important radiation backgrounds since it can emanate from nearly all the materials containing radium and migrate freely in the experiment system. To support the China Dark Matter Experiment (CDEX) at China Jinping Underground Laboratory (CJPL), a series of high-sensitivity radon detection systems with different electrostatic collection chambers were designed, and radon in nitrogen as well...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Fan Wang Hao Wang Zhi Zeng Jinmin Yang Kang Peng Lei Zhang Qiuju Guo Source Type: research
Radiation-induced modification effects in covalent-network glass formers: Phenomenological description within unified configuration-enthalpy model
Appl Radiat Isot. 2024 Feb 24;206:111255. doi: 10.1016/j.apradiso.2024.111255. Online ahead of print.ABSTRACTExternally-induced modification activated by high-energy excitation such as γ-irradiation from 60Co source is analyzed in chalcogenide glasses in terms of radiation-structural and glass-relaxation metastability, at the example of sulphides (including stoichiometric arsenic trisulphide, As2S3) and selenides. Unified configuration-enthalpy model evolving conjugated configuration-coordinate (free energy in dependence on configuration coordinate) and thermodynamic enthalpy (temperature deviations in enthalpy, configura...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Oleh Shpotyuk Mykola Vakiv Andriy Kovalskiy Roman Golovchak Valentina Balitska Mykhaylo Shpotyuk Source Type: research
Investigation of NK cell function against two target hematological cell line using radioactive chromium assay
In this study two hematological cell lines K562 and MDS where used and target and results showed different sensitivity to killing by NK cells separated from healthy volunteers. Results have been shown that MDS release significantly more radioactive chromium indicating higher degree of necrosis during cell culture. In addition, K562 cell line is better target for NK killing in all different E:T ratio in comparison to MDS cell line previously described. Based on this, it is suggested that K562 cells be continues used in the future as better target for investigation NK killing.PMID:38422944 | DOI:10.1016/j.apradiso.2024.11125...
Source: Applied Radiation and Isotopes - February 29, 2024 Category: Radiology Authors: Vladimir Juri šić Source Type: research
