Radiation Physics and Chemistry最新文献

{"title":"Optimizing minibeam collimator design for enhancing normal tissue sparing in ocular tumour proton therapy","authors":"Tsz-Yui Chan ,&nbsp;Chien-Yu Lin ,&nbsp;Shen-Hao Lee ,&nbsp;Jiunn-Woei Liaw ,&nbsp;Tsi-Chian Chao ,&nbsp;I-Chun Cho","doi":"10.1016/j.radphyschem.2025.112674","DOIUrl":"10.1016/j.radphyschem.2025.112674","url":null,"abstract":"<div><div>Uveal melanoma, the most common primary intraocular tumour in adults, presents significant therapeutic challenges due to its aggressive nature and the potential for severe treatment-related complications, including vision loss. Achieving effective tumour control while minimizing damage to surrounding healthy tissues remains a critical goal in radiotherapy. Proton minibeam radiotherapy (pMBRT), an advanced form of spatially fractionated radiotherapy (SFRT), has emerged as a promising approach to address these challenges.</div><div>pMBRT employs a mechanical collimator to spatially fractionate a broad proton beam into multiple narrow beamlets, creating a dose distribution with high-dose peaks and low-dose valleys in shallow regions. As the beamlets travel deeper into tissue, multiple Coulomb scattering facilitates their convergence, resulting in a uniform dose at the tumour target.</div><div>This study systematically optimized the collimator design by evaluating various geometries and materials, specifically brass and polylactic acid (PLA). Simulations of dose distributions were performed using the Tool for Particle Simulation (TOPAS) and validated through experimental measurements with Gafchromic films. Results indicated that brass collimators, with their high atomic number, produced sharper dose profiles and higher peak-to-valley dose ratios (PVDR), demonstrating superior spatial dose modulation. Conversely, PLA collimators yielded smoother dose profiles and lower secondary dose contributions, showcasing their potential for reducing collateral tissue damage.</div><div>The optimized collimator design, featuring a 0.8 mm slit width and a 1 mm spacing, achieved an ideal balance between maximizing PVDR and ensuring uniform beam recombination at the target depth. These findings underscore the potential of tailored collimator designs to enhance the therapeutic precision of pMBRT, offering improved tumour control with minimized impact on healthy tissues. This study provides a foundation for further advancements in collimator technology and its clinical applications in treating uveal melanoma and other challenging tumour sites.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112674"},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553025","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":"Exploration of the gamma-ray shielding capabilities of tungsten oxide and chromium-infused silicone rubber composites","authors":"B.P. Srilakshmi ,&nbsp;A. Jagannatha Reddy ,&nbsp;M.R. Ambika ,&nbsp;Sherry Shajan Kuttukaran ,&nbsp;Yeshwanth H. Reddy ,&nbsp;N. Nagaiah ,&nbsp;D.N. Deepika ,&nbsp;Kalappa Prashantha","doi":"10.1016/j.radphyschem.2025.112661","DOIUrl":"10.1016/j.radphyschem.2025.112661","url":null,"abstract":"<div><div>Gamma rays are highly energetic type of ionizing radiation important in medical diagnostics, which requires effective protective measures. Polymers reinforced with appropriate fillers can offer excellent radiation shielding properties comparable to conventional materials. This study investigates the gamma radiation shielding efficiency of silicone rubber reinforced with tungsten oxide (WO₃) and chromium (Cr). Composites with fixed 30 phr WO₃ and varying Cr concentrations (10–70 phr) were fabricated and characterized. Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray spectroscopy (FESEM/EDX) confirmed uniform filler dispersion, while FTIR showed no significant chemical changes. X-ray diffraction (XRD) analysis revealed average crystallite sizes of 11–32 nm (Scherrer's formula) and 16–39 nm (Williamson-Hall plot). The mechanical properties were explored using a Universal Testing Machine (UTM), revealing that an increase in filler content correlated with enhanced tensile strength and hardness. Gamma attenuation studies (using Cs-137 and Ba-133 sources) revealed the excellent efficiency of the composite with 30 phr WO₃ and 50 phr Cr (3WO5C) with Mass Attenuation Coefficients (MAC) increasing from 1.45, 0.202, and 0.103 cm²/g to 1.57, 0.258, and 0.129 cm²/g, and half-value layer (HVL) thickness decreasing from 0.356, 2.551, and 6.722 cm to 0.269, 1.642, and 5.366 cm, for gamma energies 80, 356 and 662 keV respectively. Critically, these composites are significantly lighter than lead, offering improved shielding performance at a reduced weight.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112661"},"PeriodicalIF":2.8,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552776","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":"Self-attenuation effect correction methods employed for gamma-ray spectrometry: A critical review study","authors":"A. Barba-Lobo","doi":"10.1016/j.radphyschem.2025.112665","DOIUrl":"10.1016/j.radphyschem.2025.112665","url":null,"abstract":"<div><div>The usage of gamma-ray spectrometry has become generalized due to several important advantages that offers versus other radiometric techniques such as alpha-particle spectrometry or liquid scintillation counting. When using gamma-ray spectrometry, the full-energy peak efficiency, FEPE, must be accurately and precisely obtained for a wide range of sample chemical compositions, apparent densities and thicknesses, as well as geometries and energies. For this, the self-attenuation effect corrections must be properly applied for each case in order to transform the calibration sample FEPE into problem sample FEPE. Nowadays, different experimental and simulated methodologies such as Cutshall and Appleby models, and LabSOCS, EFFTRAN, DETEFF, PENELOPE and Geant4, respectively, are generally applied to obtain the problem sample FEPE. However, in many cases, self-attenuation effect corrections can be not properly applied. For this reason, the aim of this study is to comprehensively critical review many different experimental and simulated methodologies usually used to apply self-attenuation effect corrections, offering exhaustive discussions about their proper use as well as proposals to improve many different aspects related to them, and making deep comparisons among their advantages and disadvantages. Moreover, an exhaustive comparison among FEPEs obtained using experimental and simulated methodologies was addressed. In the case of the sample pretreatment, this study also offers a wide discussion of many aspects related to their homogenization process regarding the chemical composition and compaction. In addition, the proper selection of the multielement technique for the major element concentrations is also widely discussed in this study, where an accurate measurement of major element concentrations is essential to properly obtain the sample mass attenuation coefficient which is needed to apply self-attenuation effect corrections.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112665"},"PeriodicalIF":2.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620386","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":"Comprehensive characterization of proton pencil beam profiles using a novel couch-mounted 2D strip detector system","authors":"Hsiao-Chieh Huang ,&nbsp;Hsien-Hsin Chen ,&nbsp;Chih-Hsun Lin ,&nbsp;Fu-Xiong Chang ,&nbsp;Wei-Heng Kao ,&nbsp;Po-Jui Chen ,&nbsp;Tsi-Chian Chao","doi":"10.1016/j.radphyschem.2025.112663","DOIUrl":"10.1016/j.radphyschem.2025.112663","url":null,"abstract":"<div><div>Proton therapy has gained prominence in recent years, with over 300,000 patients treated worldwide using advanced techniques like pencil beam scanning (PBS). Accurate measurement of proton beam characteristics is crucial for optimizing treatment plans and ensuring patient safety. This study introduces a novel two-dimensional strip detector system, CROSS, integrated with a programmable couch mount, designed to evaluate proton beam properties across various gantry angles. The CROSS detector's performance was validated through comparisons with a pinpoint chamber, Gafchromic EBT3 film, and the XRV-124 detector. Spot size measurements showed a slight increase compared to the pinpoint chamber, with average deviations of 11.3% in the Y-direction and 6.3% in the X-direction. Spot position accuracy tests demonstrated excellent agreement with EBT3 film, with an average positional deviation of 0.11 ± 0.06 mm, and all deviations remaining within 0.2 mm. The beam characteristics across different gantry angles showed maximum spot size variations of 0.17 mm in the Y-axis and 0.11 mm in the X-axis. Proton isocenter measurements with CROSS were largely consistent with XRV-124, with deviations under 0.2 mm in most cases, except for gantry angles of 90° and 315°, where deviations of 0.25 mm and 0.33 mm were observed. These findings highlight the CROSS detector's precision and versatility, making it a valuable tool for quality assurance in proton therapy.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112663"},"PeriodicalIF":2.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552779","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":"Effect of electron beam irradiation on properties of EVA/HDPE blends with intumescent flame retardants","authors":"Sangwon Park ,&nbsp;Hyun-Rae Kim ,&nbsp;Sang-Yun Kang ,&nbsp;Seung-Tae Jung ,&nbsp;Young-Chang Nho ,&nbsp;Jong-Seok Park ,&nbsp;Byoung-Min Lee ,&nbsp;Jae-Hak Choi","doi":"10.1016/j.radphyschem.2025.112664","DOIUrl":"10.1016/j.radphyschem.2025.112664","url":null,"abstract":"<div><div>Conventional thermoplastics are widely used as insulating materials in various industrial fields, but various research efforts are being conducted to improve their thermal stability and flame retardancy. In this study, poly(ethylene-co-vinyl acetate) (EVA)/high-density polyethylene (HDPE)/intumescent flame retardants (IFRs) blends were prepared, and changes in properties were investigated according to the IFRs contents and electron beam irradiation conditions. As the content of IFRs increased, the flame retardancy of the blends improved significantly, but mechanical properties deteriorated. Mechanical properties, thermal stability, and flame retardancy were enhanced by electron beam irradiation, attributed to the formation of crosslinked network structures. UL-94 vertical tests results revealed that blends containing more than 50 g of IFRs and irradiated at 100 kGy exhibited a UL-94 V-0 rating. Therefore, the EVA/HDPE/IFRs blends prepared in this study can be applied as insulating materials with excellent thermal stability, mechanical properties, and flame retardancy.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112664"},"PeriodicalIF":2.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552780","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":"Positron driven molecular processes for H2CO, NO2 and HCN","authors":"Neha Barad,&nbsp;Smruti Parikh,&nbsp;Chetan Limbachiya","doi":"10.1016/j.radphyschem.2025.112643","DOIUrl":"10.1016/j.radphyschem.2025.112643","url":null,"abstract":"<div><div>In this work, we report results of comprehensive study of positron driven molecular chemistry for planetary compounds, H₂CO, NO₂ and HCN. All these molecules are highly polar in nature making the positron-molecule interaction more sensitive to polarization potential at lower energies. We have employed a novel approach to construct the polarization potential that takes Positron Correlation Polarization (PCP) to determine the energy independent cut-off thereby properly accounting for the short range effects. We have quantified various molecular processes initiated due to positron interaction by evaluating elastic (<span><math><mrow><msub><mi>Q</mi><mrow><mi>e</mi><mi>l</mi></mrow></msub></mrow></math></span>), inelastic (<span><math><mrow><msub><mi>Q</mi><mrow><mi>i</mi><mi>n</mi><mi>e</mi><mi>l</mi></mrow></msub></mrow></math></span>), direct ionization (<span><math><mrow><msub><mi>Q</mi><mrow><mi>D</mi><mo>−</mo><mi>i</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span>), positronium formation (<span><math><mrow><msub><mi>Q</mi><mrow><mi>P</mi><mi>s</mi></mrow></msub></mrow></math></span>), total ionization (<span><math><mrow><msub><mi>Q</mi><mrow><mi>i</mi><mi>o</mi><mi>n</mi></mrow></msub></mrow></math></span>) and total cross-sections (<span><math><mrow><msub><mi>Q</mi><mrow><mi>t</mi><mi>o</mi><mi>t</mi></mrow></msub></mrow></math></span>) for the wide energy span from circa 1 eV–5000 eV using modified Spherical Complex Optical Potential (SCOP) method. Positron driven ionization is investigated using Complex Scattering Potential – ionization contribution (CSP-ic) method. In this work, positronim formation and direct ionization channels are reported for the first time, except for H₂CO. This study aims to find probabilities for different positron assisted processes for these molecules using the quantum chemical treatment that can contribute to improve various models of atmospheric chemistry.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112643"},"PeriodicalIF":2.8,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553012","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":"Synthesis, structural, linear/nonlinear optical properties, and radiation shielding potential of iron silicate (Fe2SiO4) nanoparticles for multi-functional applications","authors":"Ahmed M. Hassan ,&nbsp;B.M. Alotaibi ,&nbsp;Ahmed S. Ali ,&nbsp;Shams A. M. Issa ,&nbsp;Hesham M.H. Zakaly","doi":"10.1016/j.radphyschem.2025.112619","DOIUrl":"10.1016/j.radphyschem.2025.112619","url":null,"abstract":"<div><div>In this study, Fe-doped SiO₂ nanoparticles (Fe–SiO₂ NPs) were synthesized using the sol-gel method to investigate their structural, and linear/nonlinear optical attributes as well as radiation shielding properties. The doping levels of Fe ranged from 0% to 12%. The X-ray diffraction (XRD) analysis confirmed the hexagonal structure of the SiO₂ matrix with the incorporation of a iron silicate cubic phase (Fe₂SiO₄) and minor peaks of monoclinic Fe₂O₃. With increasing Fe concentrations, the crystallite size increased from 39 nm to 48 nm, while lattice strain and dislocation density decreased. The optical measurements revealed a red shift in the absorption spectra with Fe doping, and the bandgap decreased from 5.65 eV for undoped SiO₂ to 5.26 eV for SOF-12. Nonlinear optical properties were significantly enhanced with Fe doping, as evidenced by the third-order nonlinear susceptibility (χ³) increased by more than double as Fe concentrations increased. Additionally, the nonlinear refractive index (n₂) exhibited a sharp increase with Fe content, indicating potential for nonlinear photonic applications. Radiation shielding assessments revealed a mass attenuation coefficient of 10.987 cm²/g at 0.015 MeV and a half-value layer of 3.36 cm at 1 MeV for the 12% Fe-doped sample (SOF-12), demonstrating superior lightweight shielding efficiency compared to conventional materials. These results demonstrate that Fe-doped SiO₂ NPs possess favorable structural and optical characteristics, making them promising candidates for applications in optoelectronics, radiation shielding, and photonic devices.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112619"},"PeriodicalIF":2.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553011","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":"Shielding performance of Al–B4C–W composite materials against gamma-ray, beta and neutron radiations","authors":"Ayhan Akkas ,&nbsp;A. Beril Tugrul ,&nbsp;Onur Tazegul","doi":"10.1016/j.radphyschem.2025.112662","DOIUrl":"10.1016/j.radphyschem.2025.112662","url":null,"abstract":"<div><div>The objective of this study is to examine the shielding efficacy of Al–B₄C–W hybrid composite materials comprising varying proportions of aluminum, boron carbide and tungsten carbide against different type of radiation. The transmission technique was applied to investigate the attenuation properties of the materials against to gamma, beta and neutron radiation. The linear and mass attenuation coefficients of the samples were determined using energetic gamma rays of 0.059 MeV (Am-241), 0.662 MeV (Cs-137) and 1.25 MeV (Co-60), as well as energetic beta rays with an Emax value of 2.25 MeV. Furthermore, the total macroscopic cross-section was calculated for the materials in the presence of a Pu–Be neutron source. The gamma mass attenuation coefficient values were compared with the theoretical values obtained from the XCOM program code. The half-value thickness was calculated using the linear attenuation coefficient and the total macroscopic cross-section values. The findings indicated that an elevated tungsten carbide concentration in the materials led to an enhancement in the half-value thicknesses for gamma and beta radiation from Am-241, Cs-137 and Co-60. Furthermore, an increase in the concentration of boron carbide led to a corresponding increase in the half-value thicknesses for the Pu–Be neutron source. In this study, it has been observed that the Al-0510 composite material exhibits higher efficiency values against mixed radiation fields than the other samples mentioned in this research. In these fields, the use of the Al-0510 composite in material has the potential both radiation shielding applications to protect personnel and equipment from different type of radiations and to replace multiple shielding materials, thus optimizing spatial efficiency.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112662"},"PeriodicalIF":2.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562675","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":"Effect of γ-irradiation on surface morphology, microstructure and diffuse reflectance of polytetrafluoroethylene","authors":"A.S. Smolyanskii ,&nbsp;M.I. Ikim ,&nbsp;S.M. Ryndya ,&nbsp;D.P. Kiryukhin ,&nbsp;L.I. Trakhtenberg","doi":"10.1016/j.radphyschem.2025.112650","DOIUrl":"10.1016/j.radphyschem.2025.112650","url":null,"abstract":"<div><div>The effect of γ-irradiation on the structural, morphological and optical properties of polytetrafluoroethylene was studied at an absorbed dose of 0.1 kGy. It has been shown that such a dose leads to an increase in the diffuse reflectance coefficient by 28% in the spectral range of 220–850 nm. The maximum effect is observed in the wavelength range from 300 to 400 nm. A correlation between radiation-induced changes in the surface microstructure and the enhancement of light reflection from γ-irradiated PTFE was established.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112650"},"PeriodicalIF":2.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526743","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":"Anisotropic stressed radiation induced synthesis of N-Isopropylacrylamide gel: Effect on swelling extent and types of waters","authors":"Khushboo Varshney ,&nbsp;K.V. Vivekananda ,&nbsp;B.N. Kaul ,&nbsp;R.K. Mondal ,&nbsp;K.A. Dubey ,&nbsp;Y.K. Bhardwaj","doi":"10.1016/j.radphyschem.2025.112647","DOIUrl":"10.1016/j.radphyschem.2025.112647","url":null,"abstract":"<div><div>Thermosensitive poly (N-Isopropylacrylamide) gels were prepared by simultaneous polymerization and crosslinking of monomer using high energy gamma radiation at room temperature and at temperatures well below the LCST of N-Isopropylacrylamide. It was observed that at very low temperature (−78°C) only there is significant effect on equilibrium water uptake that too at significantly high dose. The mechanical properties of the gels also depend on the dose and synthesis temperature. But the temperature effect gets nullified as the absorbed dose increases.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"232 ","pages":"Article 112647"},"PeriodicalIF":2.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553010","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}