Radiation Physics and Chemistry最新文献_第3页

Radiation dose assessment to abdominal and pelvic organs in fluoroscopy-guided lumbar epidural steroid injections: A phantom-based analysis 透视引导下腰椎硬膜外类固醇注射对腹部和盆腔器官的辐射剂量评估：基于幻象的分析

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-27 DOI: 10.1016/j.radphyschem.2025.113272

Abdurrahman Tünay , Mehmet Toptaş , Fahrettin Fatih Kesmezacar , Duygu Tunçman Kayaokay , Osman Günay , Songül Karaçam , Didem Çolpan Öksüz , Mustafa Demir , Ghada ALMisned , H.O. Tekin

{"title":"Radiation dose assessment to abdominal and pelvic organs in fluoroscopy-guided lumbar epidural steroid injections: A phantom-based analysis","authors":"Abdurrahman Tünay , Mehmet Toptaş , Fahrettin Fatih Kesmezacar , Duygu Tunçman Kayaokay , Osman Günay , Songül Karaçam , Didem Çolpan Öksüz , Mustafa Demir , Ghada ALMisned , H.O. Tekin","doi":"10.1016/j.radphyschem.2025.113272","DOIUrl":"10.1016/j.radphyschem.2025.113272","url":null,"abstract":"<div><div>This study aims to quantify organ-specific radiation doses during transforaminal lumbar epidural steroid injections (ESI) performed under C-arm fluoroscopic guidance using a phantom-based experimental setup. An Alderson Rando anthropomorphic phantom was used to simulate the human anatomy. A total of 32 MTS-100 thermoluminescent dosimeters (LiF:Mg,Ti) were placed at predefined anatomical sites representing abdominal and pelvic organs. Fluoroscopy was conducted using a Siemens Artis Zee system with standard clinical protocols at gantry angles of 0°, 45°, and 180°. The absorbed doses were measured, and organ-specific distributions were analysed. The highest radiation doses were recorded in the left kidney, pancreas, and spleen. Reproductive organs such as the upper ovaries and uterus also received moderate exposure, while the bladder and medulla spinalis received the lowest doses. It can be concluded that even the fluoroscopic beam is localized to the lumbar spine, scattered radiation can result in significant exposure to critical organs, which underlines the importance of optimized imaging protocols and targeted radiation protection measures.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113272"},"PeriodicalIF":2.8,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring the work-function of ZnO sol-gel derived ZnO films using electron beam irradiation for flexible organic solar cells 利用电子束辐照调整柔性有机太阳能电池中ZnO溶胶-凝胶衍生ZnO薄膜的工作功能

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-27 DOI: 10.1016/j.radphyschem.2025.113268

Seung-Hwan Oh, Jin-Mun Yun, Hyun Bin Kim

{"title":"Tailoring the work-function of ZnO sol-gel derived ZnO films using electron beam irradiation for flexible organic solar cells","authors":"Seung-Hwan Oh, Jin-Mun Yun, Hyun Bin Kim","doi":"10.1016/j.radphyschem.2025.113268","DOIUrl":"10.1016/j.radphyschem.2025.113268","url":null,"abstract":"<div><div>This study investigates the use of electron beam (EB) irradiation to tune the work-function of ZnO films prepared from EB-irradiated ZnO sol-gel solution for application as electron transporting layers (ETLs) in flexible organic solar cells (OSCs) fabricated on PEN/ITO substrates. ZnO precursor solutions were irradiated at doses from 100 to 500 kGy under nitrogen-purged, vacuum-sealed conditions using a 10 MeV electron accelerator. Ultraviolet photoelectron spectroscopy (UPS) revealed that EB irradiation in the range between 100 and 300 kGy reduced the ZnO work function from 4.06 eV (0 kGy) to 2.78 eV (500 kGy), allowing optimal alignment with the PC<sub>71</sub>BM LUMO (∼3.9 eV). Surface characterization by atomic force microscopy (AFM) confirmed roughness was reduced at intermediate doses, while X-ray photoelectron spectroscopy (XPS) showed a decrease in hydroxyl species and stabilized lattice oxygen, indicating defect passivation. Flexible OSC devices incorporating the ZnO film prepared from EB-irradiated ZnO sol-gel solution exhibited improved fill factors from 55.72 % at 0 kGy to 60.47 % at 300kGy and increased power conversion efficiencies from 7.61 % to 8.13 %. These results demonstrate that EB irradiation effectively tailors the electronic and interfacial properties of ZnO ETLs, enabling enhanced charge extraction and scalable low-temperature processing for flexible photovoltaics.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113268"},"PeriodicalIF":2.8,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Burnable absorbers in pebble-bed high-temperature reactor designs 球床高温反应器设计中的可燃吸收剂

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-27 DOI: 10.1016/j.radphyschem.2025.113269

Radek Škoda, Martin Lovecký, Jiří Závorka

{"title":"Burnable absorbers in pebble-bed high-temperature reactor designs","authors":"Radek Škoda, Martin Lovecký, Jiří Závorka","doi":"10.1016/j.radphyschem.2025.113269","DOIUrl":"10.1016/j.radphyschem.2025.113269","url":null,"abstract":"<div><div>Pebble-bed high-temperature reactors (HTRs) that operate with an OTTO (Once-Through-Then-Out) fuel cycle face challenges such as strong initial reactivity excess and axial power peaking, which can compromise safety margins. This study evaluates the integration of burnable absorbers (BAs) directly into TRISO particle coatings as a strategy for controlling reactivity and flattening power distribution. A comprehensive neutronic analysis was performed using the Serpent 2 Monte Carlo code, which explicitly modeled the double heterogeneity of pebble fuel. All elements with natural abundance were screened and categorized based on their required mass loading and depletion behavior. At the pebble level, boron, indium, and gold provided significant initial reactivity suppression with stable burnup characteristics, while lithium and europium were effective for long-term reactivity control. At the core level, erbium, boron, iridium, mercury, and protactinium were successful in reducing axial and pebble-level power peaking, effectively shifting the axial maximum downward. The results demonstrate that optimized configurations of burnable absorbers can both control reactivity and improve power distribution in OTTO-cycle HTRs, offering a practical approach to designing safer and more efficient reactors.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113269"},"PeriodicalIF":2.8,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144922529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Helical X-ray tube trajectory estimation via image noise analysis for enhanced CT dosimetry 基于图像噪声分析的增强CT剂量学螺旋x射线管轨迹估计

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-26 DOI: 10.1016/j.radphyschem.2025.113260

Tatsuya Maeda , Kazuki Takegami , Sota Goto , Takashi Asahara , Daiki Kobayashi , Rina Nishigami , Natsumi Kimoto , Kazuta Yamashita , Kosaku Higashino , Shinichi Morimoto , Takeshi Konishi , Motochika Maki , Hiroaki Hayashi

{"title":"Helical X-ray tube trajectory estimation via image noise analysis for enhanced CT dosimetry","authors":"Tatsuya Maeda , Kazuki Takegami , Sota Goto , Takashi Asahara , Daiki Kobayashi , Rina Nishigami , Natsumi Kimoto , Kazuta Yamashita , Kosaku Higashino , Shinichi Morimoto , Takeshi Konishi , Motochika Maki , Hiroaki Hayashi","doi":"10.1016/j.radphyschem.2025.113260","DOIUrl":"10.1016/j.radphyschem.2025.113260","url":null,"abstract":"<div><div>Information on the helical trajectory of the X-ray tube is necessary for accurate dose evaluation during computed tomography (CT). We aimed to propose a methodology for analyzing the trajectory of the X-ray tube. The novelty of this paper is that the incident direction of X-rays is estimated from the standard deviation (SD) distribution. The X-ray incident direction for each slice was analyzed using a distribution function of SD values, in which the analysis regions were placed in the air region. Then, the helical trajectory of the CT scan was estimated by fitting a three-dimensional helical function to the analyzed data. The robustness of our algorithm was verified through phantom studies: the analyzed X-ray incident directions were compared with instrumental log data, in which cylindrical polyoxymethylene resin phantoms and a whole-body phantom were scanned. Chest CT scanning was mimicked, in which the field of view (FOV) was set at the lung region. The procedure for analyzing the X-ray incident direction was applicable to cylindrical phantoms regardless of the phantom size. In contrast, in the case of the whole-body phantom, although it was possible to apply our procedure to the chest and abdomen regions, the shoulder slices were inappropriate to analyze. Therefore, the helical trajectory was determined based on chest and abdominal CT images. The accuracy in X-ray incident direction analysis was evaluated to be 7.5°. In conclusion, we have developed an algorithm to estimate a three-dimensional helical trajectory that can be used for dose measurements and simulations.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113260"},"PeriodicalIF":2.8,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optically stimulated dosimeters for small field audits in radiotherapy 放射治疗中小型现场审计用光刺激剂量计

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-26 DOI: 10.1016/j.radphyschem.2025.113261

E.F. Granados-Sánchez , J.M. Lárraga-Gutiérrez , O.A. García-Garduño

{"title":"Optically stimulated dosimeters for small field audits in radiotherapy","authors":"E.F. Granados-Sánchez , J.M. Lárraga-Gutiérrez , O.A. García-Garduño","doi":"10.1016/j.radphyschem.2025.113261","DOIUrl":"10.1016/j.radphyschem.2025.113261","url":null,"abstract":"<div><div>Dosimetry audits play a vital role in ensuring precision and accuracy in radiation therapy. Most existing protocols for these audits are designed for conventional radiation fields using luminescent radiation detectors. This study aims to broaden the application of optically stimulated luminescent dosimeters by developing an audit protocol that employs nanodots® for non-conventional and small photon fields. To achieve this, the audit focused on field sizes ranging from 1.0 cm × 1.0 cm–10.0 cm × 10.0 cm. Monte Carlo simulations analyzed the behavior of nanodots® by considering important factors such as material density, partial volume averaging effects, detector geometry, and detector positioning during irradiation. External radiotherapy centers volunteered to help validate this protocol by conducting experimental measurements. The results show that using nanodots® in non-conventional or small fields provides reliable measurements within 5 % for field sizes down to 1.0 × 1.0 cm. We do not recommend using fields smaller than 1.0 × 1.0 cm because various issues may compromise measurement reliability. Density and volume averaging effects as perturbation factors can lead to measurement deviations of up to 12 %. Significant deviations also occur with very slight displacements in detector positioning, reaching up to 31 % for a 2 mm displacement.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113261"},"PeriodicalIF":2.8,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative evaluation of 3D-printed and ACR vials for PET/CT QA: SUV and heterogeneity analysis 3d打印和ACR小瓶用于PET/CT QA的比较评价：SUV和异质性分析

IF 2.9 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-26 DOI: 10.1016/j.radphyschem.2025.113264

M.H. Hanafi, N. Mohd Noor, S.H. Ramli, F.F. Ahmad Saad, F. Mohamed, M. Musarudin

{"title":"Comparative evaluation of 3D-printed and ACR vials for PET/CT QA: SUV and heterogeneity analysis","authors":"M.H. Hanafi, N. Mohd Noor, S.H. Ramli, F.F. Ahmad Saad, F. Mohamed, M. Musarudin","doi":"10.1016/j.radphyschem.2025.113264","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113264","url":null,"abstract":"This study evaluates the performance of 3D-printed vials as alternatives to standardized American College of Radiology (ACR) phantoms for PET/CT quality assurance using standardized uptake values (SUV<ce:inf loc=\"post\">max</ce:inf>, SUV<ce:inf loc=\"post\">mean</ce:inf>) and heterogeneity metrics. Four paired ACR vials (25, 16, 12, 8 mm) and 3D-printed vials (matched dimensions, 0.2 mm layer resolution) were imaged on a Siemens Biograph system following clinical protocols. Quantitative analysis revealed excellent agreement for 25 mm vials, with SUV<ce:inf loc=\"post\">max</ce:inf> values of 2.37 ± 0.02 (ACR) versus 2.39 ± 0.03 (3D-printed) (p > 0.05), both within clinical acceptance criteria (1.8–2.8) per ACR guidelines. The 16 mm/25 mm SUV ratio (0.89 for 3D-printed vs. 0.93 for ACR) exceeded the 0.7 diagnostic threshold, confirming preserved contrast recovery. However, increasing heterogeneity was observed in smaller 3D-printed vials (COV up to 1.39 % vs. 0.95 % for ACR at 25 mm), attributed to material inconsistencies and printing artifacts. These findings demonstrate that 3D-printed vials perform comparably to ACR standards for clinically relevant volumes (≥12 mm) while require further optimization of printing resolution and material selection.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"41 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145009036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

16th international Symposia on Radiation Physics (ISRP-16) 第16届国际辐射物理研讨会（ISRP-16）

IF 2.9 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-23 DOI: 10.1016/j.radphyschem.2025.113258

引用次数: 0

Time response of an undoped LaCl3 crystal 未掺杂LaCl[公式略]晶体的时间响应

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-22 DOI: 10.1016/j.radphyschem.2025.113239

M. Caballero , V. Sánchez-Tembleque , L.M. Fraile , C. Fonseca-Vargas , S. Gaitán , H.J. Kim , V. Martínez-Nouvilas , M. Martínez-Roig , E. Nácher , J.M. Udías , P.Q. Vuong

{"title":"Time response of an undoped LaCl3 crystal","authors":"M. Caballero , V. Sánchez-Tembleque , L.M. Fraile , C. Fonseca-Vargas , S. Gaitán , H.J. Kim , V. Martínez-Nouvilas , M. Martínez-Roig , E. Nácher , J.M. Udías , P.Q. Vuong","doi":"10.1016/j.radphyschem.2025.113239","DOIUrl":"10.1016/j.radphyschem.2025.113239","url":null,"abstract":"<div><div>We have characterized a detector equipped with an undoped LaCl<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> truncated cone crystal with dimensions of 22.5 mm in the largest diameter, 16 mm in the smallest diameter, and 16 mm in height, coupled to a fast Photonis XP2020/URQ photomultiplier tube (PMT). Its time response at 511 keV (<sup>22</sup>Na) and <sup>60</sup>Co photon energies has been measured against a reference detector using a fast digitizer module by digital signal processing methods based on a genetic algorithm. The time resolution was optimized by the choice of the photomultiplier bias voltage and the fine-tuning of the digital parameters of the time pickup algorithm. The de-convoluted full width at half maximum (FWHM) time resolution is found to be 250 ± 10 ps at <sup>60</sup>Co energies, and 444 ± 8 ps using positron annihilation <span><math><mi>γ</mi></math></span>-rays from <sup>22</sup>Na, providing good prospects for the use of the crystal in applications requiring a fast time response.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113239"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conceptual design of Passive Neutron Spectrometers using polyethylene and polymethylmethacrylate moderators 使用聚乙烯和聚甲基丙烯酸甲酯慢化剂的被动中子光谱仪的概念设计

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-22 DOI: 10.1016/j.radphyschem.2025.113257

Hector Rene Vega-Carrillo , Ahmed M. El-Khayatt , Antonio Baltazar-Raigosa , Victor Martin Hernandez-Davila , Ayed M. Binzowaimil , Miguel Angel Salas-Luevano

{"title":"Conceptual design of Passive Neutron Spectrometers using polyethylene and polymethylmethacrylate moderators","authors":"Hector Rene Vega-Carrillo , Ahmed M. El-Khayatt , Antonio Baltazar-Raigosa , Victor Martin Hernandez-Davila , Ayed M. Binzowaimil , Miguel Angel Salas-Luevano","doi":"10.1016/j.radphyschem.2025.113257","DOIUrl":"10.1016/j.radphyschem.2025.113257","url":null,"abstract":"<div><div>Two passive neutron spectrometers were designed using Monte Carlo methods. Each spectrometer utilizes six 20.5 cm-diameter cylindrical moderators of varying thicknesses (0.5, 4.5, 8.5, 12.5, 16.5, and 20.5 cm). One spectrometer employs polyethylene moderators, while the other uses polymethylmethacrylate. Thermal neutrons are measured using pairs of thermoluminescent chips with different <sup>6</sup>Li content (TLD600 and TLD700). Responses to γ-rays of these TLDs and are approximately the same because have the same elemental composition, the same effective atomic number and similar densities. For both spectrometers, fluence response functions and absorbed doses from neutrons and secondary γ-rays were estimated for 45 monoenergetic neutron energies ranging from 10<sup>−9</sup> to 20 MeV. As monoenergetic neutrons are moderated to thermal energies, they reach the TLDs with an energy distribution, inducing <sup>6</sup>Li (n, α) reactions that define the fluence response function. Energy deposition from these neutrons and γ-rays within the TLDs allows for absorbed dose calculation. The fluence response matrices are similar for both moderator materials; however, neutron absorbed dose is consistently higher in TLD600 than in TLD700, independent of the moderator. Conversely, γ-ray absorbed dose is similar across TLD types and moderators. These spectrometers offer a smaller size and lower weight compared to a passive Bonner sphere spectrometer, while also being easier to construct and more portable.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113257"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, morphological and gamma radiation shielding characteristics of Gd and Nd doped BaSO4 Gd和Nd掺杂BaSO4的结构、形态和γ辐射屏蔽特性

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-08-22 DOI: 10.1016/j.radphyschem.2025.113253

Hakan Eroğlu , Sümeyye Gümüş Uzun , Bayram Bilmez , Mustafa Çağatay Tufan , Bilgehan Cem Turan , Mevlüt Gürbüz

{"title":"Structural, morphological and gamma radiation shielding characteristics of Gd and Nd doped BaSO4","authors":"Hakan Eroğlu , Sümeyye Gümüş Uzun , Bayram Bilmez , Mustafa Çağatay Tufan , Bilgehan Cem Turan , Mevlüt Gürbüz","doi":"10.1016/j.radphyschem.2025.113253","DOIUrl":"10.1016/j.radphyschem.2025.113253","url":null,"abstract":"<div><div>In this study, gamma attenuation properties of Gd and Nd doped barium sulfate (BaSO4) were investigated using a gamma spectrometry system with narrow beam geometry. Materials were synthesized by solid-state synthesis method, and characterized to evaluate their structural, morphological, and radiation shielding properties. The effect of the doping rate was also studied. Linear and mass attenuation coefficients were determined, and from these values, atomic and electronic cross sections, effective atomic number, and electron density, half value layer (HVL), tenth value layer (TVL), and mean free path (MFP) values were also calculated. The results were compared with XCOM values. It was found that doping Gd and Nd increased the attenuation coefficients in the low-energy region, but their effect was limited at higher photon energies. The same trend is also observed for other calculated parameters such as HVL, TVL, and MFP. The bare BaSO<sub>4</sub> samples, as well as samples doped with Gd and Nd, are found to have high attenuation properties, showing potential in shielding and other dosimetric utilization. Radiation shielding capability was investigated using exposure buildup factor (EBF) calculations via the EpiXS software. The results indicated significantly high EBF values at low photon energies (40–100 keV) and in deep penetration scenarios (>10 mfp). In addition to the radiation attenuation properties, the structural and morphological properties of the samples were also determined by SEM, EDX and XRD methods. The SEM analysis revealed the coexistence of submicron spherical particles and particles with sharp edges, which resulted from the synthesis temperature and the mechanical crushing effect of an agate mortar. EDX analysis confirmed the successful incorporation of dopant elements into the BaSO<sub>4</sub> crystal structure.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113253"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0