Improvements in the radiochemical method for separating < sup > 226 < /sup > Ra in solid samples through coprecipitation with BaSO < sub > 4 < /sub >
Appl Radiat Isot. 2022 Jun 16;187:110321. doi: 10.1016/j.apradiso.2022.110321. Online ahead of print.ABSTRACTThe aim of this work was to improve the commonly used method for 226Ra determination in water and to establish its application in solid samples. This method is based on the coprecipitation of Ra with BaSO4 and gross alpha counting of the precipitate. An exhaustive study of the coprecipitation behaviour of the most abundant cations present in solid samples was performed to avoid incorrect radiochemical yields. As a result, it was considered necessary to introduce two new purification steps into the conventional metho...
Source: Applied Radiation and Isotopes - June 22, 2022 Category: Radiology Authors: J A Su árez-Navarro V M Exp ósito-Suárez M T Crespo B S ánchez-Castaño M J Su árez-Navarro C Gasc ó M Barrag án J L Gasc ón R Pecker L S ánchez-Pérez L Gonz ález-Cano A Rosario Source Type: research

Improvements in the radiochemical method for separating < sup > 226 < /sup > Ra in solid samples through coprecipitation with BaSO < sub > 4 < /sub >
Appl Radiat Isot. 2022 Jun 16;187:110321. doi: 10.1016/j.apradiso.2022.110321. Online ahead of print.ABSTRACTThe aim of this work was to improve the commonly used method for 226Ra determination in water and to establish its application in solid samples. This method is based on the coprecipitation of Ra with BaSO4 and gross alpha counting of the precipitate. An exhaustive study of the coprecipitation behaviour of the most abundant cations present in solid samples was performed to avoid incorrect radiochemical yields. As a result, it was considered necessary to introduce two new purification steps into the conventional metho...
Source: Applied Radiation and Isotopes - June 22, 2022 Category: Radiology Authors: J A Su árez-Navarro V M Exp ósito-Suárez M T Crespo B S ánchez-Castaño M J Su árez-Navarro C Gasc ó M Barrag án J L Gasc ón R Pecker L S ánchez-Pérez L Gonz ález-Cano A Rosario Source Type: research

Improvements in the radiochemical method for separating < sup > 226 < /sup > Ra in solid samples through coprecipitation with BaSO < sub > 4 < /sub >
Appl Radiat Isot. 2022 Jun 16;187:110321. doi: 10.1016/j.apradiso.2022.110321. Online ahead of print.ABSTRACTThe aim of this work was to improve the commonly used method for 226Ra determination in water and to establish its application in solid samples. This method is based on the coprecipitation of Ra with BaSO4 and gross alpha counting of the precipitate. An exhaustive study of the coprecipitation behaviour of the most abundant cations present in solid samples was performed to avoid incorrect radiochemical yields. As a result, it was considered necessary to introduce two new purification steps into the conventional metho...
Source: Applied Radiation and Isotopes - June 22, 2022 Category: Radiology Authors: J A Su árez-Navarro V M Exp ósito-Suárez M T Crespo B S ánchez-Castaño M J Su árez-Navarro C Gasc ó M Barrag án J L Gasc ón R Pecker L S ánchez-Pérez L Gonz ález-Cano A Rosario Source Type: research

A new-designed system for continuous measurement of radon in water
Appl Radiat Isot. 2022 Jun 16;187:110320. doi: 10.1016/j.apradiso.2022.110320. Online ahead of print.ABSTRACTOn-line continuous monitoring of radon concentration in water is of great significance for its environmental application as a radioactive tracer, for example, as a potential precursor for earthquake forecast and volcanic eruption. To realize on-line continuous measurement on radon in complex water body, a compact measurement system mainly consisted of a simple degassing device and an electrostatic radon monitor is newly developed. The sensitivity of the measurement system is 73 ± 5 cph/(Bq/L), and the detection lim...
Source: Applied Radiation and Isotopes - June 21, 2022 Category: Radiology Authors: Chunyu He Zhi Zeng Lei Zhang Yunxiang Wang Qiuju Guo Source Type: research

Development of a portable TDCR system at NIM, China
Appl Radiat Isot. 2022 Jun 8;187:110315. doi: 10.1016/j.apradiso.2022.110315. Online ahead of print.ABSTRACTIn order to meet the demand of on-site measurement for radionuclides, a portable liquid scintillation TDCR system was developed at National Institute of Metrology (NIM), China. The system consists small size TDCR counter for the measurement of liquid scintillation sources, and digital electronics for pulse signal processing. The optical chamber adopts Teflon material with high diffuse reflection efficiency. Two independent signal processing solutions were used here for TDCR counting. One employed the on-line TDCR sol...
Source: Applied Radiation and Isotopes - June 21, 2022 Category: Radiology Authors: Qianqian Zhou Haoran Liu Zhijie Yang Weihua Zeng Juncheng Liang Source Type: research

A new-designed system for continuous measurement of radon in water
Appl Radiat Isot. 2022 Jun 16;187:110320. doi: 10.1016/j.apradiso.2022.110320. Online ahead of print.ABSTRACTOn-line continuous monitoring of radon concentration in water is of great significance for its environmental application as a radioactive tracer, for example, as a potential precursor for earthquake forecast and volcanic eruption. To realize on-line continuous measurement on radon in complex water body, a compact measurement system mainly consisted of a simple degassing device and an electrostatic radon monitor is newly developed. The sensitivity of the measurement system is 73 ± 5 cph/(Bq/L), and the detection lim...
Source: Applied Radiation and Isotopes - June 21, 2022 Category: Radiology Authors: Chunyu He Zhi Zeng Lei Zhang Yunxiang Wang Qiuju Guo Source Type: research

Development of a portable TDCR system at NIM, China
Appl Radiat Isot. 2022 Jun 8;187:110315. doi: 10.1016/j.apradiso.2022.110315. Online ahead of print.ABSTRACTIn order to meet the demand of on-site measurement for radionuclides, a portable liquid scintillation TDCR system was developed at National Institute of Metrology (NIM), China. The system consists small size TDCR counter for the measurement of liquid scintillation sources, and digital electronics for pulse signal processing. The optical chamber adopts Teflon material with high diffuse reflection efficiency. Two independent signal processing solutions were used here for TDCR counting. One employed the on-line TDCR sol...
Source: Applied Radiation and Isotopes - June 21, 2022 Category: Radiology Authors: Qianqian Zhou Haoran Liu Zhijie Yang Weihua Zeng Juncheng Liang Source Type: research

Relationships between natural radionuclides activity concentration in soils of the State of Alagoas, Brazil and WRB/FAO soil classification, types of parental rocks and rainfall variability
Appl Radiat Isot. 2022 Jun 1;187:110309. doi: 10.1016/j.apradiso.2022.110309. Online ahead of print.ABSTRACTClimate, soil type and geology that can influence the activity concentrations of natural radionuclides in soils. For this, 41 samples were collected in the first 25 cm of soil from the state of Alagoas, Northeast Brazil. This sample collection represents the mains soils classifications, parental rocks, and rainfall variability in this locality. The samples of soils were processed and analyzed by means of gamma-ray spectrometry for the 40K, 226Ra and 228Ra. The non-parametric Mann-Whitney U test was applied to perform...
Source: Applied Radiation and Isotopes - June 20, 2022 Category: Radiology Authors: Rog ério A Filgueiras Ademir X Silva Alessandro M Domingues Fernando Carlos A Ribeiro Eduardo Paim Viglio Source Type: research

Microstructure of gamma-ray developed polymeric nanocomposite respecting cesium and cobalt removal from aqueous solutions
Appl Radiat Isot. 2022 Jun 9;187:110323. doi: 10.1016/j.apradiso.2022.110323. Online ahead of print.ABSTRACTThe nanoparticles of fly ash (FA) were obtained by high energy ball milling of their parent Class C kind for subsequent synthesis of poly(acrylamide-acrylic acid)/fly ash (poly(AM-AA)/FA) nanocomposite. The gamma-radiation induced polymerization was applied to achieve this concern. Different techniques were utilized to characterize such nanocomposite. The sorption abilities of the synthesized nanocomposite toward 60Co2+ and 134Cs + radionuclides were evaluated using batch and fixed-bed column approaches. Batches were...
Source: Applied Radiation and Isotopes - June 20, 2022 Category: Radiology Authors: H H Ibrahiem M I El-Dessouky M R El-Naggar E H El-Masry M M Abo-Aly Source Type: research

Investigation the effect of a magnetic field on the dose distribution of I-125, Ir-192, Yb-169, and Co-60 brachytherapy sources by Monte Carlo simulation
This study investigates the impact of a magnetic field of 1.5 T, 3 T, and 7 T strengths on the dose distribution of high dose rate Co-60, Ir-192, and Yb-169, and low dose rate I-125 sources, using Geant4 Monte Carlo toolkit. After validating the simulation results by calculating the AAPM-TG43 dosimetric parameters, seven sources of each radioisotope were simulated in a water phantom, and their dose distributions were compared under the influence of a magnetic field. The simulation results indicate that using Co-60 brachytherapy under the MRI guidance is not recommended. Furthermore, the impact of a magnetic field of up to ...
Source: Applied Radiation and Isotopes - June 19, 2022 Category: Radiology Authors: Naser Jafarzadeh Payman Hejazi Mohammad Ali Tajik Mansoury Reza Khodabakhshi Zafar Riazi Somayeh Gholami Source Type: research

First principles calculation for generating new thermal neutron scattering data for Zirconium hydride
Appl Radiat Isot. 2022 Jun 9;187:110313. doi: 10.1016/j.apradiso.2022.110313. Online ahead of print.ABSTRACTLattice parameters of materials have the same magnitude as the energy of thermal neutrons in reactors, which directly affects the neutron cross section and its energy. While they are thermalized, incident neutrons can lose or gain energy during their interactions with materials components. Since several decades, methods and models were developed in the aim to generate nuclear data sub-libraries required in correcting neutrons interactions cross sections at thermal energies. However, very few experimental works were d...
Source: Applied Radiation and Isotopes - June 19, 2022 Category: Radiology Authors: M El Barbari T El Bardouni H El Yaakoubi Y Boulaich M Lahdour H Ziani I Berriban Source Type: research

Investigation the effect of a magnetic field on the dose distribution of I-125, Ir-192, Yb-169, and Co-60 brachytherapy sources by Monte Carlo simulation
This study investigates the impact of a magnetic field of 1.5 T, 3 T, and 7 T strengths on the dose distribution of high dose rate Co-60, Ir-192, and Yb-169, and low dose rate I-125 sources, using Geant4 Monte Carlo toolkit. After validating the simulation results by calculating the AAPM-TG43 dosimetric parameters, seven sources of each radioisotope were simulated in a water phantom, and their dose distributions were compared under the influence of a magnetic field. The simulation results indicate that using Co-60 brachytherapy under the MRI guidance is not recommended. Furthermore, the impact of a magnetic field of up to ...
Source: Applied Radiation and Isotopes - June 19, 2022 Category: Radiology Authors: Naser Jafarzadeh Payman Hejazi Mohammad Ali Tajik Mansoury Reza Khodabakhshi Zafar Riazi Somayeh Gholami Source Type: research

First principles calculation for generating new thermal neutron scattering data for Zirconium hydride
Appl Radiat Isot. 2022 Jun 9;187:110313. doi: 10.1016/j.apradiso.2022.110313. Online ahead of print.ABSTRACTLattice parameters of materials have the same magnitude as the energy of thermal neutrons in reactors, which directly affects the neutron cross section and its energy. While they are thermalized, incident neutrons can lose or gain energy during their interactions with materials components. Since several decades, methods and models were developed in the aim to generate nuclear data sub-libraries required in correcting neutrons interactions cross sections at thermal energies. However, very few experimental works were d...
Source: Applied Radiation and Isotopes - June 19, 2022 Category: Radiology Authors: M El Barbari T El Bardouni H El Yaakoubi Y Boulaich M Lahdour H Ziani I Berriban Source Type: research

Generation of cross section for neutron induced nuclear reaction on iridium and tantalum isotope using machine learning technique
Appl Radiat Isot. 2022 May 26;187:110306. doi: 10.1016/j.apradiso.2022.110306. Online ahead of print.ABSTRACTIn this work, we proposed a new approach in generating nuclear data using machine learning techniques. This paper focused on generation of nuclear cross section for neutron induced-nuclear reaction on iridium isotopes (Ir-191) and tantalum isotopes (Ta-181) target, specifically 191Ir (n,p)191Os and 181Ta (n, 2n)180Ta using random forest algorithms. The input consists of experimental datasets obtained from EXOR and simulated datasets from TALYS 1.9. We found that the regression curve generated by our model is in good...
Source: Applied Radiation and Isotopes - June 18, 2022 Category: Radiology Authors: Mohamad Amin Bin Hamid Hoe Guan Beh Nazirul Nazrin Shahrol Nidzam Xiao Yan Chew Saba Ayub Source Type: research

Generation of cross section for neutron induced nuclear reaction on iridium and tantalum isotope using machine learning technique
Appl Radiat Isot. 2022 May 26;187:110306. doi: 10.1016/j.apradiso.2022.110306. Online ahead of print.ABSTRACTIn this work, we proposed a new approach in generating nuclear data using machine learning techniques. This paper focused on generation of nuclear cross section for neutron induced-nuclear reaction on iridium isotopes (Ir-191) and tantalum isotopes (Ta-181) target, specifically 191Ir (n,p)191Os and 181Ta (n, 2n)180Ta using random forest algorithms. The input consists of experimental datasets obtained from EXOR and simulated datasets from TALYS 1.9. We found that the regression curve generated by our model is in good...
Source: Applied Radiation and Isotopes - June 18, 2022 Category: Radiology Authors: Mohamad Amin Bin Hamid Hoe Guan Beh Nazirul Nazrin Shahrol Nidzam Xiao Yan Chew Saba Ayub Source Type: research