Radiation Physics and Chemistry最新文献

{"title":"Gamma attenuation and radiation shielding performance of CaCu3B2Re2O12 (BMn, Fe, Co, and Ni) perovskites","authors":"B. Alshahrani ,&nbsp;Jamila S. Alzahrani ,&nbsp;Amani Alalawi ,&nbsp;Sultan Alomairy ,&nbsp;I.O. Olarinoye ,&nbsp;M.S. Al-Buriahi","doi":"10.1016/j.radphyschem.2024.112292","DOIUrl":"10.1016/j.radphyschem.2024.112292","url":null,"abstract":"<div><div>In order to identify the importance of perovskites in nuclear science, studies aimed at obtaining the radiation interaction quantities of perovskites are essential. This study computed and analyzed the gamma photon interaction parameters of CaCu₃B₂Re₂O₁₂ (B<img>Mn, Fe, Co, and Ni) perovskites to reveal their shielding potentials and comparative advantages against traditional shielding materials. Four samples of ferrimagnetic quaternary perovskites whose chemical structures are summarized as CaCu₃B₂Re₂O₁₂ (B<img>Mn (CCMRO1), Fe (CCMRO2), Co (CCMRO3), and Ni (CCMRO4)) were considered for their gamma interaction quantities. The values of mass attenuation coefficient (<span><math><mrow><mfrac><mi>μ</mi><mi>ρ</mi></mfrac></mrow></math></span>) was calculated with XCOM and they were in the range of 0.0552 cm²/g–0.4162 cm²/g for CCMRO1, 0.0553 cm²/g–0.4165 cm²/g CCMRO2, 0.0552 cm²/g–0.4148 cm²/g for CCMRO3, and 0.0555 cm²/g–0.4163 cm²/g for CCMRO4. The values of effective atomic number and electron density was within the range 21.38–43.38 and 2.84 x 10²³ electrons/g −5.62 x10²³ electrons/g, respectively. The trend of the mass energy absorption coefficients of the perovskites was also found to be in the same order as the mass attenuation coefficient. CCMRO3 has the highest photon energy absorptive ability among the perovskites while CCMRO2 has the least capacity. Also, the gamma dose rates in15 mm thick of CCMRO1, CCMRO2, CCMRO3, and CCMRO4 for 1.25 MeV are about 1446 kR/h, 1449 kR/h, 1453 kR/h, and 1446 kR/h, respectively. Comparatively, the values of the exposure and energy absorption buildup factors were almost the same for the perovskites at the same energy and optical depth. The investigated perovskites had higher mass attenuation coefficients that standard shielding glasses. The perovskites can be used for shielding or any other radiation absorption roles in radiation science and technology, especially for photons at low energies.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112292"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554565","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}

{"title":"Enhance optically stimulated luminescence sensitivity and improve fading of newly developed LiMgPO4:Er phosphor","authors":"Kaiyong Tang ,&nbsp;Li Fu ,&nbsp;Siyuan Zhang ,&nbsp;Mo Zhou ,&nbsp;Haijun Fan ,&nbsp;Yan Zeng","doi":"10.1016/j.radphyschem.2024.112297","DOIUrl":"10.1016/j.radphyschem.2024.112297","url":null,"abstract":"<div><div>To avoid fading, the readout time of the old LiMgPO₄:Er in the previous study had to be taken to be at least 20 s. The readout time is up to 20 s, which not only contradicts the fast OSL readout, but also eliminates too many OSL signals per readout and is not favourable to the requirement that the OSL can be read multiple times. The primary objective of this study is to reduce readout time under conditions where the OSL signal of LiMgPO₄:Er phosphor stabilizes after irradiation. The OSL properties were investigated. To achieve OSL fading of about 5% within 30 d after irradiation, the shortest integration time for new LiMgPO₄:Er in this study was 1 s, whereas old LiMgPO₄:Er required 20 s. When the integration time was 1 s, the OSL sensitivity of the new LiMgPO₄:Er samples in this study was about 2.4 times that of the old LiMgPO₄:Er samples. A new LiMgPO₄:Er phosphor with an OSL signal loss of about 5% for the shortest integration time of 1 s within 30 days after irradiation, a sensitivity comparable to that of TLD-500k, and an MMD as low as 38 μGy was successfully prepared, which will meet the fast read out and the multiple readings requirements.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112297"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441079","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}

{"title":"Zinc boro-aluminosilicate glass for infrared and gamma sensing applications: Physical properties and gamma ray attenuation aspects","authors":"Yahaya Saadu Itas ,&nbsp;Mayeen Uddin Khandaker ,&nbsp;Aliyu Mohammed Aliyu ,&nbsp;Ali Shawabkeh ,&nbsp;Afsar khan ,&nbsp;Abdulrahman A. Almehizia","doi":"10.1016/j.radphyschem.2024.112293","DOIUrl":"10.1016/j.radphyschem.2024.112293","url":null,"abstract":"<div><div>The demand for more materials for efficient shielding of radiation has been on the rise day by day due to some witnessed progress in applications of radiations in science and technology. In this research, we investigated the gamma ray shielding capacity of zinc boro-aluminosilicate (ZBASi) glass by varying concentrations of B₂O₃. Fundamentally, experimental and theoretical means were both adopted to evaluate photon shielding characteristics of the studied glasses. Additionally, amorphous nature and crystalline sizes of the glass sample were determined using XRD technique and Debye Scherrer equation respectively. The results show that as the B₂O₃ content increased from 55 to 70 wt %, the optical bandgap, and packing density decreased. However, the density, and molar volume were found to increase accordingly. Using Phy-x/PSD and genat4, the maximum values of mass attenuation coefficient (MAC) for ZBASi-4, ZBASi-3, ZBASi-2, and ZBASi-1 were found to be 20.2, 17.5, 16.3, and 9.6 cm²/g at 20 KeV, respectively. With respect to exposure rate, the exposure buildup factor (EBF) is low in the region where density is high, meaning that photon attenuation power is high in the region of low EFB (high density). The production of aluminosilicate glass poses fewer environmental risks than that of traditional lead-based shielding materials. It is therefore a more environmentally friendly option since harmful heavy metals are not involved.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112293"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445724","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}

{"title":"Evaluation of the cross section data for cyclotron production of medical radionuclides 201Pb→201Tl and 203Pb","authors":"Samar ,&nbsp;N. Amjed ,&nbsp;A. Naz ,&nbsp;A.M. Wajid ,&nbsp;M. Eman ,&nbsp;M.A. Saeed","doi":"10.1016/j.radphyschem.2024.112294","DOIUrl":"10.1016/j.radphyschem.2024.112294","url":null,"abstract":"<div><div>Lead Isotopes can be effectively used in nuclear medicine, ²⁰³Pb forms a theranostic pair with ²¹²Pb whereas ²⁰¹Pb→ ²⁰¹Tl, facilitate the production of ²⁰¹Tl via the generator system. The aim of this work was to achieve the high purity production of ²⁰³Pb and ²⁰¹Tl via a cyclotron. To achieve this, several charged particle induced reactions namely ²⁰⁵Tl(p,3n)²⁰³Pb, ²⁰⁵Tl(d,4n)²⁰³Pb, ²⁰⁵Tl(p,5n)²⁰¹Pb→²⁰¹Tl, ²⁰⁵Tl(d,6n)²⁰¹Pb→²⁰¹Tl, ²⁰³Tl(p,3n)²⁰¹Pb→²⁰¹Tl, and ²⁰³Tl(d,4n)²⁰¹Pb→²⁰¹Tl were evaluated. First the consistency and reliability of the experimental data were ensured by using established nuclear model codes like TALYS 1.9 and EMPIRE 3.2. A robust methodology, based on experimental data and theoretical nuclear models, was used to generate the recommended cross sections for each production route and associated radioisotopic impurities. The thick target yields were calculated for each production route and its corresponding impurity reaction by utilizing the recommended/reference data. Following a thorough analysis and comparison of the evaluated production routes, it was concluded that the most promising options are ²⁰⁵Tl(d,4n)²⁰³Pb and ²⁰³Tl(p,3n)²⁰¹Pb→²⁰¹Tl. Their optimum conditions were determined as E_d = 30 → 21 MeV and Ep = 30 → 21 MeV with integral yields of 568.9 MBq/μAh and 1223.5 MBq/μAh respectively.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112294"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445725","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}

{"title":"Study of natB(3He, p) reactions cross sections using a novel setup for 3He-NRA micro analyses","authors":"Toni Dunatov ,&nbsp;Georgios Provatas ,&nbsp;Stjepko Fazinić ,&nbsp;Varvara Foteinou ,&nbsp;Fotios Maragkos ,&nbsp;Karla Ivanković Nizić ,&nbsp;Maja Mičetić","doi":"10.1016/j.radphyschem.2024.112298","DOIUrl":"10.1016/j.radphyschem.2024.112298","url":null,"abstract":"<div><div>In the present work experimentally determined differential cross sections of the reactions ¹⁰B(³He, p_1,3)¹²C, ¹¹B(³He, p_0,1,2,3)¹³C and ¹¹B(³He, d₀)¹²C are reported. The measurements cover the 2–3 MeV energy range, for 5 detection angles of θ = 137°, 141°, 146°, 152°, 158°. A novel experimental setup was designed for this purpose and installed at the Dual Microprobe end-station of the Ruđer Bošković Institute (RBI) in Zagreb, Croatia. It involves an annular strip charged particle silicon detector with a large solid angle, enabling a relatively fast acquisition process without significant increase in the angular uncertainty. The obtained cross sections were benchmarked with a thick amorphous boron target in a different experimental setup at RBI, as well as at the scattering chamber setup of the RUBION accelerator facility in Bochum, Germany.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112298"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554688","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}

{"title":"Application of phase space file secondary computation method in cell dose distribution","authors":"Jiahao Guo ,&nbsp;Xinlei Li ,&nbsp;Yidi Wang,&nbsp;Han Gao,&nbsp;Xianghui Kong,&nbsp;Tao Wu,&nbsp;Xinjie Wang,&nbsp;Kaijin Yan,&nbsp;WenYue Zhang,&nbsp;YuChen Yin,&nbsp;Jianping Cao,&nbsp;Yang Jiao,&nbsp;Liang Sun","doi":"10.1016/j.radphyschem.2024.112301","DOIUrl":"10.1016/j.radphyschem.2024.112301","url":null,"abstract":"<div><div>Phase space files can store the particle information in one or more planes of radiation particles simulated by the Monte Carlo (MC) method. The secondary calculation method based on phase space files is commonly used to improve the efficiency of MC simulations. However, it is still unclear whether phase space files are applicable for microdosimetric evaluations. In this study, voxel-type and mesh-type monolayer cell population models of different sizes were constructed, and phase space files of secondary electrons generated by photons with different initial energies were obtained using the MC software -- PHITS. The overall average dose caused by the secondary electron phase space files in the region of interest and their microdosimetric distribution within cells were calculated and compared with the results caused by the initial photons under the same geometric conditions. The results showed that the adoption of secondary electron phase space files had almost no impact on the evaluation of macroscopic average dose, with deviations lower than 3% compared to the overall dose caused by the initial photons in the Petri dish. For microdosimetric distributions of the voxel-type model and the two different morphologies of mesh-type cell models, with a macroscopic accumulated dose of 1 mGy, the relative deviation of the cell dose distribution generated by the initial photons and the phase space files was below 10% and the total computation time of phase space files was below 2% of initial photon's. For accumulated doses of 10, 50, and 100 mGy, the relative deviation of the cell nucleus specific energy obtained by secondary electrons and initial photons was greater than 10%. As the size of the culture dish increased, the differences in cell dose distributions also increased, with the root mean square error (<em>RMSE</em>) and coefficient of variation (<span><math><mrow><msub><mi>C</mi><mi>v</mi></msub></mrow></math></span>) of dose distributions both exceeding 30%. In conclusion, this study assessed the effectiveness of the secondary calculation method utilizing phase space files for dose evaluation at the cellular scale. This research offers essential technical support and theoretical foundations for the utilization of this approach in microdosimetric investigations at the cellular level.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112301"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441013","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}

{"title":"Utilizing acrylic acid polymer hydrogel for 3-D quality assurance in CyberKnife radiotherapy","authors":"Samer I. Awad ,&nbsp;Khalid A. Rabaeh ,&nbsp;Akram A. Almousa ,&nbsp;Md A. Al Kafi ,&nbsp;Ihssan S. Masad ,&nbsp;Belal Moftah","doi":"10.1016/j.radphyschem.2024.112300","DOIUrl":"10.1016/j.radphyschem.2024.112300","url":null,"abstract":"<div><div>Dosimetry tools play a crucial role in radiotherapy as they are essential for recording and validating intricate 3-D dose distributions. This research introduces and examines a novel acrylic acid polymer hydrogel (ACAPHG) dosimeter composition designed for 3-D dose verification and quality assurance in the context of radiotherapy treatment. A phantom made of an 80 mm diameter cylindrical glass container was utilized. The phantom contained the hydrogel, which served as the medium for radiation exposure. The water equivalent hydrogel within the phantom was subjected to irradiation by a CyberKnife robotic radiotherapy system. An optical computed tomography (OCT) scanner with sub-millimeter resolution was used to obtain imaging data. The dose distribution of a CyberKnife robotic SRS/SBRT treatment plan for a brain cancer patient was compared to that of the hydrogel's OCT scan using 2-D and 3-D gamma analysis with a criterion of 3% dose difference and 3 mm distance-to-agreement. A gamma pass rate of 94.1% for the 2-D gamma analysis and a pass rate of 99% for the 3-D gamma analysis were calculated within the region at which the treatment planning system data drops to 20% of the maximum dose. The use of the ACAPHG dosimeter in conjunction with the described setup suggests that it has the potential to offer an accurate 3-D verification of complex dose distributions in SRS/SBRT radiotherapy treatments. By employing the ACAPHG dosimeter and utilizing OCT scanning, this dosimeter enables the assessment and validation of intricate dose distributions in these advanced radiotherapy treatments.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112300"},"PeriodicalIF":2.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554689","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}

{"title":"Gamma irradiation-induced degradation of hexachlorobenzene in methanol: Kinetics, mechanism and dehalogenation pathway","authors":"Samir Karimov ,&nbsp;Elshad Abdullayev ,&nbsp;Muslum Gurbanov ,&nbsp;Lala Gasimzada ,&nbsp;Shabnam Feyziyeva","doi":"10.1016/j.radphyschem.2024.112288","DOIUrl":"10.1016/j.radphyschem.2024.112288","url":null,"abstract":"<div><div>Hexachlorobenzene (HCB), a persistent organic pollutant (POP) and organochlorine compound (OCC), poses significant environmental and health risks due to its high stability and solubility in fats, oils, and organic solvents. This study investigates the degradation of HCB in methanol using gamma irradiation with a⁶⁰Co source. A 2 × 10⁻⁴ M solution of HCB in methanol was prepared and irradiated at a dose rate of 1.74 Gy/s. The degradation process was monitored using Gas Chromatography-Mass Spectrometry (GC-MS), with optimized parameters for effective separation and analysis of byproducts.</div><div>The results demonstrated a 100% degradation of HCB at an absorbed dose of approximately 51 kGy. The degradation pathway involved successive dechlorination, forming various chlorinated benzene (CB) byproducts such as pentachlorobenzene (PCB), tetrachlorobenzenes (TeCB), trichlorobenzenes (TCB), dichlorobenzenes (DCB), and ultimately benzene.</div><div>Ion chromatography (IC) analysis revealed a dose-dependent increase in Cl⁻ concentrations, confirming the efficiency of dechlorination. A chlorine mass balance was performed to evaluate the distribution of chlorine during the degradation process, tracking Cl⁻ ions, CBs, and residual HCB. As the dose increases, the chlorine content in residual HCB decreases significantly, with none remaining at 50.2 kGy and beyond. At 169.5 kGy, nearly all chlorine (99.96%) is unaccounted for, suggesting that it has likely been released as gaseous byproducts, such as Cl₂ or other volatile chlorinated compounds.</div><div>The formation of solvated electrons and hydrogen radicals initiated the dechlorination process, as evidenced by the identified reaction mechanisms. Kinetic analysis indicated that the degradation followed pseudo-first-order kinetics, with a rate constant of 5 × 10⁻⁴ s⁻¹. The study also outlines a dose-dependent trend in radiation chemical yields (G values), initially increasing to a peak of 7.3 × 10⁻² molecules per 100 eV at 12.6 kGy and subsequently decreasing to as low as 5.4 × 10⁻⁴ at 50.2 kGy.</div><div>This study highlights the effectiveness of gamma irradiation for the complete degradation of HCB in methanol, offering a promising method for the remediation of POPs-contaminated environments. The proposed mechanism and kinetic properties provide a comprehensive understanding of the radiolytic degradation process, paving the way for further applications in environmental cleanup technologies.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112288"},"PeriodicalIF":2.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417949","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}

{"title":"Exploring the potential utilization of gamma-irradiated waste eggshell powder as oil sorbents in natural rubber foams","authors":"Sutinee Khumsap ,&nbsp;Nattharika Parapichai ,&nbsp;Pattra Lertsarawut ,&nbsp;Kiadtisak Saenboonruang","doi":"10.1016/j.radphyschem.2024.112287","DOIUrl":"10.1016/j.radphyschem.2024.112287","url":null,"abstract":"<div><div>A simple, green approach was developed to enhance the oil adsorption capacity of waste eggshell (WES) powder using gamma irradiation, with varying doses (0–10 kGy). Relevant properties (chemical composition, functional group, particle size, pore characteristics, thermal stability, morphology, and oil adsorption) of both non-irradiated and gamma-irradiated WES powders were determined and reported. The results indicated that gamma irradiation did not alter most properties of the WES powder, except for the pore characteristics and oil adsorption. Specifically, the WES powders irradiated with doses of 2 kGy and 10 kGy had substantially improved adsorption capabilities for engine oil and diesel, respectively, exhibiting approximately threefold enhancements compared to the non-irradiated ones. The suitable gamma-irradiated WES powder obtained from the first part was then incorporated into natural rubber foam (NRF) samples, with varying contents of 0–9 parts per hundred rubber (phr). Their respective properties, consisting of functional group, thermal stability, morphology, density, pore characteristics, and oil adsorption, were subsequently determined. The main findings revealed that the addition of 3–6 phr of gamma-irradiated WES powder increased the densities and oil adsorption capacities of the NRF/WES samples for both engine oil and diesel in comparison to those of neat NRF, while negligibly affecting other properties. The outcomes from this work suggested that gamma-irradiated WES powder not only improved the intended oil adsorption capacity of the NRF samples but also paved the way for alternative, greener approaches to replace the harmful chemical or energy-consuming procedures typically required for the modification/synthesis of similar substances or materials through gamma irradiation.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112287"},"PeriodicalIF":2.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417950","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}

{"title":"Modification of microstructure, optical, and electrical properties in 180 keV Co and Fe implanted Al1.5Ga0.5O3 thin-films","authors":"C.B. Nettar ,&nbsp;R.N. Bhowmik ,&nbsp;K. Devarani Devi ,&nbsp;R.C. Meena ,&nbsp;K. Asokan","doi":"10.1016/j.radphyschem.2024.112275","DOIUrl":"10.1016/j.radphyschem.2024.112275","url":null,"abstract":"<div><div>We report the microstructure, optical and electrical properties of Al_1.5Ga_0.5O₃ thin films implanted by 180 keV Fe and Co ions. The X-ray diffraction pattern confirmed rhombohedral structure with R <span><math><mrow><mover><mn>3</mn><mo>‾</mo></mover></mrow></math></span> c space group for pristine and Fe-implanted films. The Co-implanted films showed amorphous structure. SRIM simulations suggested oxygen vacancy in the films. The atomic force microscopy confirmed the formation of spherical-shaped particles (17–20 nm) in Co-implanted GaAlO_Si_550 films. The RMS roughness of the GaAlO_Si_550 films increased from 19 nm to 25 nm at higher Co-ion implantation fluences. X-ray photoelectron spectroscopy supported the formation of oxygen vacancy and non-stoichiometry at surface of the films. Electrical conductivity of the films enhanced up to 10⁻²- 10⁻³ S/m by metallic Fe- and Co ion implantation. Optical band gap was found at ∼3.85 eV for GaAlO_Al_550 and ∼4.04 eV for GaAlO_Si_550 pristine films. Optical band gap was stabilized in the range of 3.75–4.52 eV for Fe- and Co-implanted films, which can be useful for opto-electronic device applications in the UV and deep blue region.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"226 ","pages":"Article 112275"},"PeriodicalIF":2.8,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142437719","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}