Preliminary study on the thermally stimulated luminescence characterization of UVC and beta irradiated tridymite
Appl Radiat Isot. 2022 May 20;186:110300. doi: 10.1016/j.apradiso.2022.110300. Online ahead of print.ABSTRACTThermoluminescence (TL) emission of tridymite, a quartz-like mineral, could be used for a variety purposes, including basic research, ceramic technology, traditional/medical industry, and dating. The current study focused on the investigation of the thermal effects on both the luminescence emission and structural properties of natural tridymite. Thermally stimulated luminescence of beta and UVC irradiated samples exhibits complex glow curves indicating simultaneous physical-chemistry processes such as phase transiti...
Source: Applied Radiation and Isotopes - May 31, 2022 Category: Radiology Authors: S Balci M Topaksu J F Benavente J Garcia-Guinea V Correcher Source Type: research

Simulation of a new neutron calibration laboratory in Brazil using MCNP5
Appl Radiat Isot. 2022 May 24;186:110289. doi: 10.1016/j.apradiso.2022.110289. Online ahead of print.ABSTRACTMetrobras, a private company in Brazil, is developing a new laboratory for the calibration of neutron detectors in collaboration with the National Laboratory for Metrology of Ionizing Radiation (LNMRI). This work aimed at assessing neutron spectra, ambient dose equivalent rates, and neutron scattering in the calibration room of Metrobras Neutron Detectors Calibration Laboratory (LCDNM) using Monte Carlo simulation with MCNP5. Three models were simulated: vacuum, air, and the complete with the several materials emplo...
Source: Applied Radiation and Isotopes - May 31, 2022 Category: Radiology Authors: Lucas Dadalt Morero Walsan Wagner Pereira Jos é Carlos Borges Patr ícia Nicolucci Source Type: research

Development of a rapid technique for sequential separation of plutonium/americium in nasal swab using solvent extraction and liquid scintillation spectrometry
Appl Radiat Isot. 2022 May 21;186:110297. doi: 10.1016/j.apradiso.2022.110297. Online ahead of print.ABSTRACTA rapid radiochemical method has been developed for estimation of plutonium and americium in nasal swab using extractive liquid scintillation spectrometry. The method involves solvent extraction of plutonium and americium from pre-treated nasal swab using 0.2 M Di-(2-ethylhexyl)phosphoricacid prepared in toluene scintillator & back extraction of americium in aqueous phase using 0.35 M HNO3. Activity assessment was carried out using liquid scintillation spectrometry. Overall recovery obtained was 96% for plutoniu...
Source: Applied Radiation and Isotopes - May 27, 2022 Category: Radiology Authors: Soumitra Panda Priyanka J Reddy J R Yadav Pramilla D Sawant M S Kulkarni Source Type: research

Development of a rapid technique for sequential separation of plutonium/americium in nasal swab using solvent extraction and liquid scintillation spectrometry
Appl Radiat Isot. 2022 May 21;186:110297. doi: 10.1016/j.apradiso.2022.110297. Online ahead of print.ABSTRACTA rapid radiochemical method has been developed for estimation of plutonium and americium in nasal swab using extractive liquid scintillation spectrometry. The method involves solvent extraction of plutonium and americium from pre-treated nasal swab using 0.2 M Di-(2-ethylhexyl)phosphoricacid prepared in toluene scintillator & back extraction of americium in aqueous phase using 0.35 M HNO3. Activity assessment was carried out using liquid scintillation spectrometry. Overall recovery obtained was 96% for plutoniu...
Source: Applied Radiation and Isotopes - May 27, 2022 Category: Radiology Authors: Soumitra Panda Priyanka J Reddy J R Yadav Pramilla D Sawant M S Kulkarni Source Type: research

Development of a rapid technique for sequential separation of plutonium/americium in nasal swab using solvent extraction and liquid scintillation spectrometry
Appl Radiat Isot. 2022 May 21;186:110297. doi: 10.1016/j.apradiso.2022.110297. Online ahead of print.ABSTRACTA rapid radiochemical method has been developed for estimation of plutonium and americium in nasal swab using extractive liquid scintillation spectrometry. The method involves solvent extraction of plutonium and americium from pre-treated nasal swab using 0.2 M Di-(2-ethylhexyl)phosphoricacid prepared in toluene scintillator & back extraction of americium in aqueous phase using 0.35 M HNO3. Activity assessment was carried out using liquid scintillation spectrometry. Overall recovery obtained was 96% for plutoniu...
Source: Applied Radiation and Isotopes - May 27, 2022 Category: Radiology Authors: Soumitra Panda Priyanka J Reddy J R Yadav Pramilla D Sawant M S Kulkarni Source Type: research

Development of a rapid technique for sequential separation of plutonium/americium in nasal swab using solvent extraction and liquid scintillation spectrometry
Appl Radiat Isot. 2022 May 21;186:110297. doi: 10.1016/j.apradiso.2022.110297. Online ahead of print.ABSTRACTA rapid radiochemical method has been developed for estimation of plutonium and americium in nasal swab using extractive liquid scintillation spectrometry. The method involves solvent extraction of plutonium and americium from pre-treated nasal swab using 0.2 M Di-(2-ethylhexyl)phosphoricacid prepared in toluene scintillator & back extraction of americium in aqueous phase using 0.35 M HNO3. Activity assessment was carried out using liquid scintillation spectrometry. Overall recovery obtained was 96% for plutoniu...
Source: Applied Radiation and Isotopes - May 27, 2022 Category: Radiology Authors: Soumitra Panda Priyanka J Reddy J R Yadav Pramilla D Sawant M S Kulkarni Source Type: research

Calculation of the half life for the thermoluminescent signal of Beryllium oxide
Appl Radiat Isot. 2022 May 17;186:110291. doi: 10.1016/j.apradiso.2022.110291. Online ahead of print.ABSTRACTHalf-life is one of the fundamental parameters to characterize the thermoluminescent (TL) response in ionizing radiation dosimetry. In general, there are two types of important half-lives to model the phenomenon of thermoluminescence (TL). The first type of half-life is the time required for the concentration of trapped charge carriers in a single trap to decrease to half its initial value; this type of half-life is generally denoted as τ1/2. Experimentally, the loss of charge carriers and the corresponding half-li...
Source: Applied Radiation and Isotopes - May 26, 2022 Category: Radiology Authors: Juan Azor ín-Nieto Claudio Furetta Enrique Ortiz-Mart ínez Claudia Azorin-Vega Source Type: research

Mouthpiece polymer-gel dosimeter for in vivo oral dosimetry during head and neck radiotherapy
In this study, we developed a mouthpiece-type gel dosimeter to prevent the oral mucositis caused by the perturbation effect of dental alloys in the radiotherapy of the head and neck regions and to enable in vivo dosimetry. Understanding the dose distribution in the oral cavity during radiotherapy helps identify the possible site for oral mucositis during treatment. Here agarose, which has a higher melting point than gelatin, was added as a coagulant to stabilize the shape of the dosimeter. The strength and dose response of the dosimeter were investigated. The strength was measured at room temperature, 20°C-40 °C, which i...
Source: Applied Radiation and Isotopes - May 26, 2022 Category: Radiology Authors: Hiraku Fuse Satoshi Oyama Tatsuya Fujisaki Kenji Yasue Koichi Hanada Fumihiro Tomita Shinji Abe Source Type: research

Calculation of the half life for the thermoluminescent signal of Beryllium oxide
Appl Radiat Isot. 2022 May 17;186:110291. doi: 10.1016/j.apradiso.2022.110291. Online ahead of print.ABSTRACTHalf-life is one of the fundamental parameters to characterize the thermoluminescent (TL) response in ionizing radiation dosimetry. In general, there are two types of important half-lives to model the phenomenon of thermoluminescence (TL). The first type of half-life is the time required for the concentration of trapped charge carriers in a single trap to decrease to half its initial value; this type of half-life is generally denoted as τ1/2. Experimentally, the loss of charge carriers and the corresponding half-li...
Source: Applied Radiation and Isotopes - May 26, 2022 Category: Radiology Authors: Juan Azor ín-Nieto Claudio Furetta Enrique Ortiz-Mart ínez Claudia Azorin-Vega Source Type: research

Mouthpiece polymer-gel dosimeter for in vivo oral dosimetry during head and neck radiotherapy
In this study, we developed a mouthpiece-type gel dosimeter to prevent the oral mucositis caused by the perturbation effect of dental alloys in the radiotherapy of the head and neck regions and to enable in vivo dosimetry. Understanding the dose distribution in the oral cavity during radiotherapy helps identify the possible site for oral mucositis during treatment. Here agarose, which has a higher melting point than gelatin, was added as a coagulant to stabilize the shape of the dosimeter. The strength and dose response of the dosimeter were investigated. The strength was measured at room temperature, 20°C-40 °C, which i...
Source: Applied Radiation and Isotopes - May 26, 2022 Category: Radiology Authors: Hiraku Fuse Satoshi Oyama Tatsuya Fujisaki Kenji Yasue Koichi Hanada Fumihiro Tomita Shinji Abe Source Type: research

Thermoluminescence glow curve analysis of Ca < sub > 3 < /sub > Y < sub > 2 < /sub > B < sub > 4 < /sub > O < sub > 12 < /sub > phosphor prepared using combustion method
Appl Radiat Isot. 2022 May 20;186:110299. doi: 10.1016/j.apradiso.2022.110299. Online ahead of print.ABSTRACTCa3Y2B4O12 (CBYO) phosphor was synthesized using a gel combustion method. X-ray diffraction (XRD) measurement confirmed a single-phase structure (space group Pnma (62)) of synthesized compound. TL measurements were conducted between room temperature (RT) and 450 °C at a heating rate of 2 °Cs-1. Significant glow peaks were observed at 64, 116, and 242 °C in CYBO phosphor sample exposed to different beta doses. In the range of 0.1-100 Gy, the TL intensity of the glow peak displayed good linearity. Different methods...
Source: Applied Radiation and Isotopes - May 25, 2022 Category: Radiology Authors: J Hakami M Sonsuz U H Kaynar M Ayvacikli M Oglakci M Y üksel M Topaksu N Can Source Type: research

Design and characterization of third-order Sallen-Key digital filter in nuclear signal processing
Appl Radiat Isot. 2022 May 20;186:110277. doi: 10.1016/j.apradiso.2022.110277. Online ahead of print.ABSTRACTThe Gaussian filter shaping circuit is widely used in the nuclear pulse signal processing due to its good performance in amplitude extraction and pulse counting. A third-order Sallen-Key (3rd S-K) filter shaping circuit is designed based on a RC integrator and a second-order Sallen-Key (2nd S-K) circuit. According to the digital 3rd S-K, the transfer functions is derived in the Laplacian domain, and the numerical recurrence model is analyzed and researched, the purpose is to obtain its transfer function and amplitud...
Source: Applied Radiation and Isotopes - May 24, 2022 Category: Radiology Authors: Huai-Qiang Zhang Yun-Chen Qian He Chen Hong-Tao Shi Source Type: research

Defining an equivalent geometry for Monte Carlo calculations of a high-purity Ge detector with high relative efficiency using a genetic algorithm
Appl Radiat Isot. 2022 May 18;186:110295. doi: 10.1016/j.apradiso.2022.110295. Online ahead of print.ABSTRACTDetailed geometric information of a high-purity Ge (HPGe) detector is a very important issue for Monte Carlo simulation of the detector. Commonly, users have no geometric information about the detector and information given by the manufacturer is not completely valid for simulation. An equivalent geometry of detector, the parameters of which can be used for Monte Carlo simulation, is optimised using a genetic algorithm for a large-volume HPGe detector in this study. A mixed-point gamma calibration standard, emitting...
Source: Applied Radiation and Isotopes - May 24, 2022 Category: Radiology Authors: Ayhan Y üksel Mehmet Tombako ğlu Source Type: research

Design and characterization of third-order Sallen-Key digital filter in nuclear signal processing
Appl Radiat Isot. 2022 May 20;186:110277. doi: 10.1016/j.apradiso.2022.110277. Online ahead of print.ABSTRACTThe Gaussian filter shaping circuit is widely used in the nuclear pulse signal processing due to its good performance in amplitude extraction and pulse counting. A third-order Sallen-Key (3rd S-K) filter shaping circuit is designed based on a RC integrator and a second-order Sallen-Key (2nd S-K) circuit. According to the digital 3rd S-K, the transfer functions is derived in the Laplacian domain, and the numerical recurrence model is analyzed and researched, the purpose is to obtain its transfer function and amplitud...
Source: Applied Radiation and Isotopes - May 24, 2022 Category: Radiology Authors: Huai-Qiang Zhang Yun-Chen Qian He Chen Hong-Tao Shi Source Type: research

Defining an equivalent geometry for Monte Carlo calculations of a high-purity Ge detector with high relative efficiency using a genetic algorithm
Appl Radiat Isot. 2022 May 18;186:110295. doi: 10.1016/j.apradiso.2022.110295. Online ahead of print.ABSTRACTDetailed geometric information of a high-purity Ge (HPGe) detector is a very important issue for Monte Carlo simulation of the detector. Commonly, users have no geometric information about the detector and information given by the manufacturer is not completely valid for simulation. An equivalent geometry of detector, the parameters of which can be used for Monte Carlo simulation, is optimised using a genetic algorithm for a large-volume HPGe detector in this study. A mixed-point gamma calibration standard, emitting...
Source: Applied Radiation and Isotopes - May 24, 2022 Category: Radiology Authors: Ayhan Y üksel Mehmet Tombako ğlu Source Type: research