Radiation Physics and Chemistry最新文献_第3页

Investigations on the structural modifications of MEH-PPV films induced by high energy electron beam irradiation 高能电子束辐照诱导MEH-PPV薄膜结构改性的研究

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-29 DOI: 10.1016/j.radphyschem.2025.113341

Nishant Chaudhary , Vibha Saxena , Mainak Roy , Jyoti Sharma , Ajay Singh , R.B. Chavan

{"title":"Investigations on the structural modifications of MEH-PPV films induced by high energy electron beam irradiation","authors":"Nishant Chaudhary , Vibha Saxena , Mainak Roy , Jyoti Sharma , Ajay Singh , R.B. Chavan","doi":"10.1016/j.radphyschem.2025.113341","DOIUrl":"10.1016/j.radphyschem.2025.113341","url":null,"abstract":"<div><div>Electron beam induced modification of surface characteristics of conducting polymer films has been attempted with the aim of exploring potential applications in the fields of photovoltaics and radiation dosimetry. Poly [2-methoxy-5 (2ˊ-ethyl hexyloxy)-1, 4- phenylene vinylene] (MEH-PPV) films were cast on flexible biaxially oriented polyethylene teraphalate (BOPET) sheets and were irradiated with electron beam of 10 MeV, generated by RF linear accelerator, in steps up to 100 kGy. Spectroscopic investigations, using a host of techniques such as photoluminescence, UV–visible spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectroscopy revealed that electron beam irradiation has initially resulted in the loss of planarity and reduction in conjugation length of the polymer chain, which however seems to have recovered at higher dose of irradiation. The impact of such structural modification in polymer films, induced by electron beam treatment, is discussed in the context of their possible photovoltaic and dosimetry application.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113341"},"PeriodicalIF":2.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228752","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

Development and characterization of new dosimeter MAGIC-glutaraldehyde 新型剂量计magic -戊二醛的研制与表征

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-29 DOI: 10.1016/j.radphyschem.2025.113340

S. Brahimi Moussa , W. Bellil

{"title":"Development and characterization of new dosimeter MAGIC-glutaraldehyde","authors":"S. Brahimi Moussa , W. Bellil","doi":"10.1016/j.radphyschem.2025.113340","DOIUrl":"10.1016/j.radphyschem.2025.113340","url":null,"abstract":"<div><div>This study presents the development of an advanced dosimetry system designed to outperform the conventional MAGIC polymer gel dosimeter. By incorporating Glutaraldehyde (GLA) as a cross-linking agent and employing X-ray computed tomography (CT) for precise three-dimensional dose readout, the modified MAGIC-G.LA gel dosimeter offers enhanced performance in radiotherapy simulations. To establish a calibration curve for the new formulation, irradiation doses ranging from 2 to 12 Gy were applied. The dose–response relationship exhibited superior linearity compared to the traditional MAGIC gel, with the calibration curve showing an excellent fit to a linear model (R<sup>2</sup> = 0.99). This improved linearity and sensitivity prompted further structural analyses to investigate the underlying mechanisms. Results suggest that Glutaraldehyde significantly contributes to the gel's enhanced polymerization response and structural stability under radiation. These findings provide deeper insight into the radiation-induced polymerization process and underscore the potential of Glutaraldehyde in optimizing polymer gel dosimetry.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113340"},"PeriodicalIF":2.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261811","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

Erratum to “Microdosimetry-based characterization of X-ray irradiators and dose enhancement factor study for cell monolayer irradiation” [Radiat. Phys. Chem. 238 (2026) 113182] 《基于微剂量学的x射线辐照剂的特性和细胞单层辐照的剂量增强因子研究》的勘误。理论物理。化学。238 (2026)113182]

IF 2.9 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-27 DOI: 10.1016/j.radphyschem.2025.113336

I.S. Gordeev

引用次数: 0

Modulation of structural phase, morphology, optical, electrical and magnetic properties of Fe2O3 films by Ag9+, O5+ and Li2+ irradiated ions Ag9+、O5+和Li2+辐照离子对Fe2O3薄膜结构相、形貌、光学、电学和磁性能的调制

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-27 DOI: 10.1016/j.radphyschem.2025.113342

Vimal Narayan Sahoo , Divya Sherin GT , R.N. Bhowmik , R.C. Meena , S.A. Khan

{"title":"Modulation of structural phase, morphology, optical, electrical and magnetic properties of Fe2O3 films by Ag9+, O5+ and Li2+ irradiated ions","authors":"Vimal Narayan Sahoo , Divya Sherin GT , R.N. Bhowmik , R.C. Meena , S.A. Khan","doi":"10.1016/j.radphyschem.2025.113342","DOIUrl":"10.1016/j.radphyschem.2025.113342","url":null,"abstract":"<div><div>Hematite (α – Fe<sub>2</sub>O<sub>3</sub>) films have been grown on p-Si substrates by using the thermal evaporation method and post-heat treatment at 550 °C to stabilize in the rhombohedral phase. The α – Fe<sub>2</sub>O<sub>3</sub> films have been irradiated with Ag<sup>9+</sup>, O<sup>5+</sup> and Li<sup>2+</sup> metal ions to modify the structure and physical properties. The stopping and range of ions in matter (SRIM) simulation has been used to estimate the presence of oxygen vacancies in the films. Apart from the surface amorphization and damages, the irradiation effect has shown a partial transformation of the α-Fe<sub>2</sub>O<sub>3</sub> phase into the α-Fe (bcc structure) phase and preferential grain orientation of the films. Rutherford backscattering spectroscopy provided the depth profile of the elemental distribution. It indicated the elemental mixing at the interfaces of the films and substrate. The irradiated films have shown the direct optical band gap in the range of (∼2.2–2.7 eV) and indirect optical band gap in the range of (∼1.29–2.09 eV) in comparison to (∼2.2 eV) for the pristine α – Fe<sub>2</sub>O<sub>3</sub> films. The irradiation of Ag, O and Li has enhanced the electrical conductivity up to an order of 10<sup>−4</sup> S/m. The irradiated films exhibited ferromagnetic character in the surface and bulk contributions. The results suggest that the Ag, O and Li irradiated Fe<sub>2</sub>O<sub>3</sub> films could be potential candidates for applications in solar cells, magneto-opto-electronic devices, and photodetectors in the deep UV range of radiation.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113342"},"PeriodicalIF":2.8,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219817","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

Characterization of scintillator mixtures based on n-dodecane and linear alkylbenzene 基于正十二烷和线性烷基苯的闪烁体混合物的表征

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-26 DOI: 10.1016/j.radphyschem.2025.113337

Andrei Sidorenkov , Anastasiia Budzinskaya , Almaz Fazliakhmetov , Dmitrii Gursky , Arslan Lukanov , Bayarto Lubsandorzhiev , Sultim Lubsandorzhiev , Dmitrii Nanzanov , Nikita Ushakov , Dmitrii Voronin

引用次数: 0

Measurement of the natHo(d,x) cross-sections up to 17.5 MeV and estimation of the 166mHo impurity 高达17.5 MeV的naatho （d,x）截面的测量和166mHo杂质的估计

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-26 DOI: 10.1016/j.radphyschem.2025.113333

Elena López-Melero , Isidro Da Silva , Javier Praena

引用次数: 0

Dosimetric evaluation of field width variation in helical Tomotherapy for sinonasal tumours: Implications for organ-at-risk sparing, treatment efficiency, and setup error sensitivity 鼻窦肿瘤螺旋断层治疗中场宽变化的剂量学评价：对高危器官保留、治疗效率和设置误差敏感性的影响

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-26 DOI: 10.1016/j.radphyschem.2025.113338

Supratik Sen , Sandeep Singh , Abhay Kumar Singh , Dipesh , Manindra Bhushan , Mahipal , Sarthak Tandon , Munish Gairola

{"title":"Dosimetric evaluation of field width variation in helical Tomotherapy for sinonasal tumours: Implications for organ-at-risk sparing, treatment efficiency, and setup error sensitivity","authors":"Supratik Sen , Sandeep Singh , Abhay Kumar Singh , Dipesh , Manindra Bhushan , Mahipal , Sarthak Tandon , Munish Gairola","doi":"10.1016/j.radphyschem.2025.113338","DOIUrl":"10.1016/j.radphyschem.2025.113338","url":null,"abstract":"<div><h3>Aim</h3><div>To evaluate the dosimetric impact of varying field widths (1 cm, 2.5 cm, and 5 cm) in Helical Tomotherapy (HT) for sinonasal tumours, focusing on target coverage, organ-at-risk (OAR) sparing, treatment efficiency, and robustness against setup errors.</div></div><div><h3>Materials and methods</h3><div>This retrospective study included 497 patients with sinonasal malignancies treated using HT. Three plans per patient were generated using field widths of 1 cm, 2.5 cm, and 5 cm. Dosimetric parameters including D95 %, D98 %, D2 %, homogeneity index (HI), Paddick's conformity index (PCI), low-dose spillage (V10–V90), and Beam-on time (BOT) were evaluated. OARs assessed included optic nerves, chiasm, brainstem, lenses, and cochlea. Statistical analysis was performed using paired t-tests (p < 0.05). Setup robustness was evaluated using an anthropomorphic phantom and optically stimulated luminescent dosimeters (OSLDs) under controlled displacements (0–5 mm).</div></div><div><h3>Results</h3><div>The 1 cm field width demonstrated superior PTV conformity (PCI: 0.82), better homogeneity, and reduced OAR doses, especially to the optic structures and brainstem. BOT was significantly higher with 1 cm (286 s) but remained clinically acceptable. Wider fields (5 cm) reduced BOT but increased dose spillage and OAR exposure. Phantom analysis showed higher dose sensitivity to setup shifts in 1 cm fields but within tolerable limits.</div></div><div><h3>Conclusion</h3><div>The 1 cm field width in HT provides optimal dosimetric benefits for sinonasal tumours, improving conformity and sparing critical structures despite a modest increase in treatment time. Personalized field width selection remains essential to balance treatment quality with efficiency.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113338"},"PeriodicalIF":2.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157883","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

Emission probability ratios of Ni-Auger electrons: p(K-LX)/p(K-LL) and p(K-XY)/p(K-LL) following K-capture in the 64Cu decay mode ni -俄格电子在64Cu衰变模式下k俘获后的发射概率比为p(K-LX)/p（K-LL）和p(K-XY)/p（K-LL）

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-25 DOI: 10.1016/j.radphyschem.2025.113339

Aneta Maria Gójska, Krystian Trela, Tymoteusz Kosiński, Karol Kozioł, Ewelina Miśta-Jakubowska, Gabriela Saworska, Marcin Wiktorowicz

{"title":"Emission probability ratios of Ni-Auger electrons: p(K-LX)/p(K-LL) and p(K-XY)/p(K-LL) following K-capture in the 64Cu decay mode","authors":"Aneta Maria Gójska, Krystian Trela, Tymoteusz Kosiński, Karol Kozioł, Ewelina Miśta-Jakubowska, Gabriela Saworska, Marcin Wiktorowicz","doi":"10.1016/j.radphyschem.2025.113339","DOIUrl":"10.1016/j.radphyschem.2025.113339","url":null,"abstract":"<div><div>The K-X-ray spectra of nickel, resulting from K-electron capture during the decay of <sup>64</sup>Cu, were recorded using an Amptek SDD detector. The <sup>64</sup>Cu isotope was synthesized through a photonuclear reaction, <sup>65</sup>Cu(γ,n)<sup>64</sup>Cu, induced by bremsstrahlung radiation generated through the deceleration of 15 MeV electrons in the nuclear electric field and virtual photons interactions mediating electron-nucleus scattering. The study determined the K-X-ray intensity ratio, K-L vacancy probabilities, and Auger electron emission probability ratios for nickel, specifically p(K-LX)/p(K-LL) and p(K-XY)/p(K-LL). These findings are noteworthy, as radioisotopes emitting Auger electrons, akin to those emitting α and β particles, are gaining prominence in targeted radionuclide therapy, where accurate Auger electron emission probabilities post K-capture are critical for enhancing therapeutic outcomes. The experimental data were compared with theoretical predictions from Multi-Configuration Dirac-Hartree-Fock (MCDHF) calculations and prior literature. Discrepancies between experimental results and MCDHF estimates may arise from unaccounted electron correlation effects in the theoretical framework.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113339"},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219816","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

Framework for optimal design of a multi-source rectangular X-ray cargo scanning system 多源矩形x射线货物扫描系统优化设计框架

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-25 DOI: 10.1016/j.radphyschem.2025.113332

Caroline Bossuyt, Arnold J. den Dekker, Domenico Iuso, Jan De Beenhouwer, Jan Sijbers

{"title":"Framework for optimal design of a multi-source rectangular X-ray cargo scanning system","authors":"Caroline Bossuyt, Arnold J. den Dekker, Domenico Iuso, Jan De Beenhouwer, Jan Sijbers","doi":"10.1016/j.radphyschem.2025.113332","DOIUrl":"10.1016/j.radphyschem.2025.113332","url":null,"abstract":"<div><div>The first line of non-destructive inspection of cargo often relies on single or double-view X-ray radiography, which is fast but lacks depth resolution and is prone to object occlusion. In contrast, conventional X-ray computed tomography (CT) allows 3D imaging but typically relies on mechanically rotating gantries, which limits throughput and increases system complexity. Recently, multi-source fixed-gantry X-ray systems have been proposed as a promising acquisition geometry to combine high imaging speed with volumetric imaging, while reducing mechanical complexity. The precision of the reconstructed images stemming from these systems as a function of the acquisition setup has however hardly been explored. This paper proposes a flexible framework for optimal experiment design of a rectangular multi-source X-ray cargo scanning system. The proposed framework allows the experimenter to calculate the highest attainable imaging precision, as quantified by the Cramér–Rao lower bound (CRLB), as a function of the X-ray system’s geometric settings, which facilitates optimal experiment design. To illustrate this potential, several system configurations with differently positioned and oriented sources are evaluated and compared in terms of the CRLB-based A-optimality criterion.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"239 ","pages":"Article 113332"},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181289","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

Low energy electron scattering by He and Ne atoms in Debye plasmas: Incorporating the screening effects through a semiempirical approach 德拜等离子体中He和Ne原子的低能电子散射：通过半经验方法结合筛选效应

IF 2.8 3区物理与天体物理

Radiation Physics and Chemistry Pub Date : 2025-09-25 DOI: 10.1016/j.radphyschem.2025.113327

Felipe Arretche , Felipe Gustavo Mallon , Eliton Popovicz Seidel , Wagner Tenfen

引用次数: 0