Radiation Physics and Chemistry最新文献

{"title":"Electret ion chamber parametric studies for high sensitivity radon monitoring","authors":"Sahel Rabiee ,&nbsp;Mehdi Sohrabi ,&nbsp;Hossein Afarideh","doi":"10.1016/j.radphyschem.2024.112498","DOIUrl":"10.1016/j.radphyschem.2024.112498","url":null,"abstract":"<div><div>An electret ion chamber (EIC) is a passive integrated ion chamber that has been widely used for indoor and outdoor radon monitoring. The EIC consists of a thin layer of charged Polytetrafluoroethylene (PTFE) electret film inside an electrically conductive chamber. The PTFE electret film provides a quasi-permanent electric field capable of collecting ions and acts as a quantitative sensor. Radon gas diffuses into the EIC through the embedded filtered areas, and alpha particles emitted from radon and its decay products ionize the air inside the chamber. The collection of ions via an electret film of opposite signs results in a surface potential reduction proportional to the radon exposure, exposure duration, and EIC sensitivity. To accommodate the differing requirements for radon monitoring, EICs of different volumes (210, 500, and 1000 cm³) have been designed, constructed and studied by employing PTFE electret films of varying thicknesses. The sensitivity of EICs was found to be dependent on the EIC volume, thickness, area, and polarity of PTFE electret film. So, by considering such parameters, EICs can be developed to meet the sensitivity requirements for short-, mid-, and long-term indoor and outdoor radon monitoring applications.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112498"},"PeriodicalIF":2.8,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989178","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":"Fabrication, structural features and radiation prevention potential of Europium incorporated multi-modifier Li–Al borophospho-silicate glasses","authors":"M.N. Vishnu Narayanan Namboothiri ,&nbsp;K.A. Naseer ,&nbsp;K. Marimuthu ,&nbsp;M.I. Sayyed ,&nbsp;A.F. Abd El-Rehim","doi":"10.1016/j.radphyschem.2024.112505","DOIUrl":"10.1016/j.radphyschem.2024.112505","url":null,"abstract":"<div><div>A brand new series of Eu³⁺ ions blended Li–Al borophospho-silictae glass matrix were synthesized by conventional melt quenching technique for radiation protection applications. XRD and FTIR characteristic profiles were recorded to confirm the amorphous nature and to analyze the geometrical configuration due to the functional groups occurrence in the prepared glasses. Physical properties were calculated and reported. Greater rigidity of the titled glasses was exposed by the structural attributes. The results obtained from the mechanical properties reveal the compactness of the Europium incorporated multi-modifier Li–Al borophospho-silicate glasses. The optical band gap studies for the titled glasses were carried out by employing Tauc's plot method, and the band gap values for direct and indirect transitions were calculated, discussed and reported. The radiation shielding ability of the glasses has been determined. In the middle energy range, the MAC values of the glasses are all very close together, within 0.001 cm²/g between 0.077 and 0.078 cm²/g. The HVLs of the tested glasses at energies starting at 0.511 are in the following order: PBSACa &gt; PBSASr &gt; PBSABa &gt; PBSAZn &gt; PBSACd.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112505"},"PeriodicalIF":2.8,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925317","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":"Synergistic effects of erbium and barium oxides on optical and gamma-ray shielding characteristic of boro-tellurite glasses","authors":"M.I. Sayyed ,&nbsp;K.A. Mahmoud ,&nbsp;Shrikant Biradar","doi":"10.1016/j.radphyschem.2024.112508","DOIUrl":"10.1016/j.radphyschem.2024.112508","url":null,"abstract":"<div><div>A new boro-tellurite glass series doped with BaO and Er₂O₃ was fabricated according to the chemical formula of (21+x) BaO + 14Bi₂O₃ + (60-x-y) B₂O₃ + 5TeO₂ + y Er₂O₃ for optical and radiation shielding applications, where y = 0, 1, 2, and 3 mol% and x = 0, 2, 4, and 6 mol%. The UV–Vis spectra for the prepared samples were detected using the spectrophotometer over a wavenumber interval of 300–1000 nm. Based on the absorption spectra, several factors related to the optical properties, including band gap, Urbach energy, refractive index, dielectric constant, reflection loss, optical transmission, and molar refraction, were computed. The increase in BaO–Er₂O₃ content throughout 21–30 mol% increases the refractive index from 2.445 to 2.520. Additionally, the impact of the substitution of B₂O₃ by BaO–Er₂O₃ on the radiation shielding properties of prepared glasses was examined over an energy interval of 0.015–15 MeV. The increase in BaO + Er₂O₃ across the concentration of 21–30 mol% raises the linear attention coefficient of prepared boro-tellurite glasses between 257.819 and 302.334 cm-1 at 0.015 MeV. The LAC enhancement is accompanied by a decreased thickness of the half-value layer, which reduced from 4.659 cm to 4.194 cm at 15 MeV when the BaO + Er₂O₃ concentrations raised throughout 21–30 mol%, respectively.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112508"},"PeriodicalIF":2.8,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967856","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":"Influence of different doses of electron beam irradiation on microbial load and physiochemical attributes of Radix ophiopogonis (Ophiopogon japonicas)","authors":"Mukesh Kumar Rathore, Dileep Kumar Manghwani, Wang Dan, Abeera Moin, Mahmooda Buriro, Rabia Faridi","doi":"10.1016/j.radphyschem.2024.112504","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2024.112504","url":null,"abstract":"Electron Beam Irradiation (EBI) is a non-thermal food processing and preservation technique that can be used to decontaminate the microbial load of perishable roots of Radix ophiopogonis (OR). Thus, preserve its nutrients constituents.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"55 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925276","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":"Enhancing ionizing radiation shielding properties with PbO and ZnO substitutions in B2O3–BaO–TiO2 novel glass system","authors":"Morad Kh Hamad","doi":"10.1016/j.radphyschem.2024.112499","DOIUrl":"10.1016/j.radphyschem.2024.112499","url":null,"abstract":"<div><div>In this study, a system of four glass samples was fabricated, using the conventional melt-quenching technique, for potential use in shielding against ionizing radiation. Different attenuation parameters were evaluated and studies using Phy-X software in the energy range of 15 keV to 1 MeV. These parameters included the linear attenuation coefficient (<span><math><mrow><mi>μ</mi></mrow></math></span>), mean-free path, half-value layer, radiation protection efficiency (RPE%), specific dose constant (Γ), and dose rate measured in Roentgens per hour. The results indicate that upon substitution of PbO and ZnO on the B₂O₃ site, an enhancement in the attenuation properties was observed. For instance, at 0.02 MeV, <span><math><mrow><mi>μ</mi></mrow></math></span> rises from 76.867 cm⁻¹ with mass density <span><math><mrow><mi>ρ</mi><mo>=</mo><mn>3.8</mn><mspace></mspace><mi>g</mi><mo>/</mo><mi>c</mi><msup><mi>m</mi><mn>3</mn></msup></mrow></math></span> for BZnPb05 sample to 220.21407 cm⁻¹ with <span><math><mrow><mi>ρ</mi><mo>=</mo><mn>5.333</mn><mspace></mspace><mi>g</mi><mo>/</mo><mi>c</mi><msup><mi>m</mi><mn>3</mn></msup></mrow></math></span> for BZnPb20 sample. In addition, at lower energy levels (0.015–0.1 MeV), RPE remains consistently high (close to 100%), indicating strong shielding capability. On the other hand, SRIM code was used to evaluate the stopping power and the range of charged particles such as protons and alpha particles as they projected into the glass materials across different energy levels. Protons show a substantial charge collection effect at energies below 0.09 MeV, while alpha particles demonstrate a similar effect around 0.7 MeV. In addition, protons exhibit greater range compared to alpha particles, attributed to the latter's higher mass and charge, resulting in more significant energy dissipation within materials they traverse. The investigated glass samples in this study can be nominated as radiation shielding materials based on acquired results.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112499"},"PeriodicalIF":2.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925300","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":"Radiation attenuation, dose rate and buildup factors of gallium silicate glass system for nuclear shielding applications","authors":"Norah Salem Alsaiari ,&nbsp;Sultan J. Alsufyani ,&nbsp;Z.A. Alrowaili ,&nbsp;Canel Eke ,&nbsp;Chahkrit Sriwunkum ,&nbsp;M.S. Al-Buriahi","doi":"10.1016/j.radphyschem.2024.112500","DOIUrl":"10.1016/j.radphyschem.2024.112500","url":null,"abstract":"<div><div>This paper investigates the radiation attenuation density independent parameters of gallium silicate glass system containing three other oxides namely SrCO₃, Nb₂O₅, and Dy₂O₃. The theoretical results of the mass attenuation factor (μ_m) for the chemical composition for each studied specimen are directly obtained through NIST database with the XCOM program. Based on the values of MAC, we calculate different parameters, that are density independent, such as effective atomic number (Z_eff). Furthermore, different density independent factors, such as equivalent atomic number (<em>Z</em>_eq), specific gamma ray constant (Γ), gamma dose rate (<em>D</em>_r) and buildup factors are determined for gallium silicate glass system containing SrCO₃, Nb₂O₅, and Dy₂O₃. It is found that the μ_m values of the SSNGD-C glass with 6 mol% of Dy₂O₃ content are the highest whereas they are the lowest for SSNGD-A with 2 mol% of Dy₂O₃ content. The <em>Z</em>_eq is maximum at 0.8 MeV and it is minimum at 0.015 MeV. This factor, <em>Z</em>_eq, increases with increment of Dy₂O₃. The nuclear shielding ability and performance of the studied glassy system show a high and acceptance performance as compared to several commercial systems that suggested previously as reliable sidelining against radiation.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112500"},"PeriodicalIF":2.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925299","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":"Investigation of radiation shielding properties in BaO–PbO2–B2O3–Y2O3 under Eu-152 radiation","authors":"Albandari W. Alrowaily ,&nbsp;Aljawhara H. Almuqrin ,&nbsp;M.I. Sayyed ,&nbsp;B. Albarzan","doi":"10.1016/j.radphyschem.2024.112503","DOIUrl":"10.1016/j.radphyschem.2024.112503","url":null,"abstract":"<div><div>This work investigates the radiation shielding properties of newly developed borate doped glasses incorporating varying contents of BaO, PbO₂ and Y₂O₃. The prepared glasses' radiation shielding properties were investigated in the 0.0359–1.46 MeV energy range, which corresponds to the Eu-152 source-emitted energies. At 0.0359 MeV, the free Y₂O₃ glass sample's mass attenuation coefficient (MAC) is 10.475 cm²/g, while it is 11.958 cm²/g for the glass with 3 mol% Y₂O₃, indicating that the MAC increases with the increment in Y₂O₃ content. All the prepared glasses' MACs show a strong radiation energy dependence, with the MAC being high at the low energy range and small at the high energy range. The prepared glasses' linear attenuation coefficient (LAC) results demonstrated that BaO, PbO₂ and Y₂O₃ addition causes improved radiation shielding performance. The LAC is also affected by the photon energy, where the LAC between 0.0395 and 0.122 MeV decreases by a factor of 7.9 for the free-Y2O3 glass sample, while it decreases by a factor of 8.09, 8.2, and 8.4 for the glasses with 1, 2, and 3 mol% Y₂O₃. The effective atomic number (Z_eff) results showed that the 26BaO–18PbO₂–55B₂O₃–3Y₂O₃ composed glass has a higher atomic number then the other prepared glasses and accordingly has better radiation shielding ability than the remaining glasses in this work.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112503"},"PeriodicalIF":2.8,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929286","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":"Fabrication and characterization of geopolymer-Y2O3 composites: Microstructure, charged particles and neutron shielding properties","authors":"Jamila S. Alzahrani ,&nbsp;Sultan J. Alsufyani ,&nbsp;Z.A. Alrowaili ,&nbsp;I.O. Olarinoye ,&nbsp;Halil Arslan ,&nbsp;Mine Kırkbınar ,&nbsp;M.S. Al-Buriahi","doi":"10.1016/j.radphyschem.2024.112501","DOIUrl":"10.1016/j.radphyschem.2024.112501","url":null,"abstract":"<div><div>Radiation shielding is one major and most effective radiation control measures that is adopted in all radiation facilities. Concrete is a traditional shielding material whose applications has remained popular even in modern nuclear radiation control. The nature of additive(s) is important in modifying the shielding efficacy of geopolymer paste and by extension concrete samples. This research, focuses on the influence of yttria (Y₂O₃) on the physical, mechanical, and (electrons (<em>e</em>^<em>-</em>), protons (<em>p</em>^<em>+</em>), alpha particles (α), heavy carbon (C) ions, and fast neutrons) radiation shielding properties of geopolymer (GEO) made from metakaolin. Three batches of the GEO-Y₂O₃ composite were prepared containing 0, 10%, and 20%, by weight of Y₂O₃. The densities of the samples were calculated as 2.28, 2.52 and 2.37 g/cm³, while the estimated hardness values were 603, 664 and 649 HV for GEO, GEO-10Y and GEO-20Y samples, respectively. The characteristics cristobalite and mullite peaks of SiO₂ observed in the spectrum of GEO was conserved in the Y₂O₃-doped GEO samples. Comparatively, the stopping powers of e−, p+, α, and C in the GEO-<em>x</em>Y follow the order: GEO &gt; GEO-10Y &gt; GEO-20Y At 15 MeV, the value of the projected range in GEO, GEO-10Y, and GEO-20Y is 1410 μm, 1470 μm, and 1610 μm for p+; 128.62 μm, 140.33 μm, and 154.55 μm for α; and 13.83 μm, 15.27 μm, and 16.86 μm for C, respectively. The value of <span><math><mrow><msub><mi>Σ</mi><mi>R</mi></msub></mrow></math></span> for GEO, GEO-10Y, and GEO-20Y is 0.07495 cm⁻¹, 0.06522 cm⁻¹, and 0.05880 cm⁻¹, respectively. An optimum concentration of 10 wt% of Y₂O₃ improved the density and hardness of the geopolymer, why the effect of yttria on the shielding behavior of the geopolymer varies with radiation quality. Yttria-doped geopolymer can be used to produce effective particle or fast neutron shielding mortar or concrete.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112501"},"PeriodicalIF":2.8,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925316","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":"Proton irradiation induced single-event burnout effect in P-GaN power devices","authors":"Ru Xue Bai ,&nbsp;Hong Xia Guo ,&nbsp;Hong Zhang ,&nbsp;Feng Qi Zhang ,&nbsp;Wu Ying Ma ,&nbsp;Xiao Ping Ouyang ,&nbsp;Xiang Li Zhong","doi":"10.1016/j.radphyschem.2024.112493","DOIUrl":"10.1016/j.radphyschem.2024.112493","url":null,"abstract":"<div><div>The microphysical mechanism of the proton-induced single-event burnout (SEB) effect in P-GaN power devices was investigated by experiments and simulations. The experiment results show that when the proton energy is 100 MeV and the proton fluence reaches 1.38 × 10¹¹ p·cm⁻², the device with the bias voltage of 600 V appears SEB. The transport and deposition processes of particles in the failure event were simulated using Monte Carlo and TCAD methods. The simulation results show that the nuclear reaction of protons with the device material leads to the generation of secondary particles with different Linear Energy Transfer (LET) values, and the secondary particles will have an ionization effect and induce many electron-hole pairs. Under the action of the electric field, electrons are rapidly collected at the drain electrode, and holes accumulate under the gate. The accumulation of charge under the gate lowers the potential barrier, producing the bipolar effect and the back-channel effect. These two effects drive more electrons toward the drain, leading to a large current breakdown. Notably, the additional electric field significantly impacts the occurrence of SEB.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112493"},"PeriodicalIF":2.8,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925329","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":"Albedo factors at 661.62 keV for several lanthanide compounds","authors":"Demet Yılmaz ,&nbsp;Abdul Fatah Pathman ,&nbsp;Sedanur Kalecik ,&nbsp;Yakup Kurucu ,&nbsp;Tuba Ö. Özer","doi":"10.1016/j.radphyschem.2024.112492","DOIUrl":"10.1016/j.radphyschem.2024.112492","url":null,"abstract":"<div><div>Lanthanides, a group of rare earth elements, have attracted considerable attention due to their unique properties and valuable applications. In this study, the albedo parameters of three distinct groups of lanthanide compounds (Cerium, Gadolinium, and Samarium) were investigated using 661.62 keV gamma radiation emitted from a¹³⁷Cs radioactive source and a high purity germanium detector in backscattering geometry. Additionally, the mass attenuation coefficients of lanthanide compounds were examined in absorption geometry. It was found that Cerium III fluoride, Gadolinium III sulfate, and Samarium III sulfate exhibit the highest albedo numbers among the lanthanide compounds. Furthermore, an exponential relationship between albedo values and mass attenuation coefficients was observed. This study concludes that molecular groups attached to the same atom can influence the photon scattering properties.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"229 ","pages":"Article 112492"},"PeriodicalIF":2.8,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925318","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}