Radiation Measurements最新文献

{"title":"Radiophotoluminescence from Au-doped soda-lime silicate glass","authors":"Hiroki Kawamoto,&nbsp;Yutaka Fujimoto,&nbsp;Keisuke Asai","doi":"10.1016/j.radmeas.2024.107320","DOIUrl":"10.1016/j.radmeas.2024.107320","url":null,"abstract":"<div><div>Radiophotoluminescence (RPL) is the phenomenon of emission from luminescence centers formed by ionizing radiation (RPL centers) and is applied in dosimeters. Knowledge regarding the development of RPL materials is limited and development of new RPL materials is required. In this study, we investigate the RPL properties of Au-doped soda-lime silicate glass. After X-ray irradiation, an emission band appeared at 650–900 nm upon excitation at 330 nm, and the emission intensity increased linearly in the dose range of 3.72–100 Gy. The UV–vis absorption, photoluminescence, and electron spin resonance spectroscopy revealed that the Au dimer, non-bridged oxygen hole center, and E’ center (electrons trapped in the glass host) were formed by ionizing radiation. The Au dimer acts as the RPL center. In addition, build-up, that is, progressive formation of RPL centers at room temperature, was completed in 20 min, and bleaching by 330 nm light was induced in Au-doped soda-lime silicate glass.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"179 ","pages":"Article 107320"},"PeriodicalIF":1.6,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary study of a compact epithermal neutron absolute flux intensity measurement system for real-time in-vivo dose monitoring in boron neutron capture therapy","authors":"Jiye Qiu ,&nbsp;Daisuke Hatano ,&nbsp;Yulin Ge ,&nbsp;Nikolaos Voulgaris ,&nbsp;Kohei Sagara ,&nbsp;Zhaopeng Qiao ,&nbsp;Shingo Tamaki ,&nbsp;Sachie Kusaka ,&nbsp;Takushi Takata ,&nbsp;Isao Murata","doi":"10.1016/j.radmeas.2024.107308","DOIUrl":"10.1016/j.radmeas.2024.107308","url":null,"abstract":"<div><div>Boron neutron capture therapy (BNCT) is a radiotherapy technology that selectively kills tumor cells via the ¹⁰B(n, <em>α</em>)⁷Li reactions. Epithermal neutrons (0.5 eV–10 keV) are emitted and converted into thermal neutrons, which have a larger neutron capture reaction cross-section, by slowing down in the human body before reaching the tumor. Recently, the development of an epithermal neutron absolute flux intensity measurement technique has become crucial for real-time in-vivo dose monitoring in BNCT. In this study, a concept for a measurement system consisting of multiple compact scintillator with optical fibers detectors covered with neutron absorbers of various thicknesses is proposed. The designed system achieves a consistent response to epithermal neutrons with a theoretical coefficient of variation not higher than 5% for both LiCAF and EJ-254 scintillators. The theoretical feasibility of the proposed measurement system was investigated by an irradiation experiment carried out at the heavy water neutron irradiation facility at the Kyoto University Reactor. The experimental results indicated that further improvement and refinement are necessary to meet the high accuracy and precision required for real-time dose monitoring in clinical applications.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107308"},"PeriodicalIF":1.6,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434395","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":"Assessing dose rate effects in TL and OSL dosimeters: A critical look into dose rate models","authors":"S. Motta,&nbsp;E.G. Yukihara","doi":"10.1016/j.radmeas.2024.107305","DOIUrl":"10.1016/j.radmeas.2024.107305","url":null,"abstract":"<div><div>This work investigates theoretically possible dose rate effects in thermoluminescence (TL) and optically stimulated luminescence (OSL) materials by solving the rate equations for the stimulated luminescence process. Starting with the solution of the One-Trap–One-Recombination-Center (OTOR) model with parameters from the literature, we first showed that this model, with the chosen parameters, does not reproduce real luminescent material properties (e.g., TL curve and dose response). We then studied the physical phenomena responsible for dose rate effects in this model, and the influence of the model parameters on the dose rate response. As a result, we found that charge accumulation in the delocalized bands over unrealistic long periods (<span><math><mo>&gt;</mo></math></span> hundreds of seconds) is responsible for dose rate effects. Such effect is caused by the particular choice of model parameters. When model parameters based on physical considerations and experimental results are chosen, no dose rate effects are observed. This work provides a deeper understanding of the luminescence process, by identifying the mechanisms that could be responsible for dose rate effects, and a theoretical foundation to the use of luminescent detectors for ultra-high dose rate dosimetry.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"179 ","pages":"Article 107305"},"PeriodicalIF":1.6,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dose conversion in retrospective dosimetry: Results and implications from an inter-laboratory comparison featuring a realistic exposure scenario","authors":"Jonathan Eakins ,&nbsp;Michael Discher ,&nbsp;Hyoungtaek Kim ,&nbsp;Min Chae Kim ,&nbsp;Hanjin Lee ,&nbsp;Jungil Lee ,&nbsp;Olivier Van Hoey ,&nbsp;Hyungjoon Yu ,&nbsp;Elizabeth Ainsbury ,&nbsp;Céline Bassinet ,&nbsp;Stephen McKeever ,&nbsp;Sergey Sholom ,&nbsp;Francois Trompier ,&nbsp;Lovisa Waldner ,&nbsp;Clemens Woda","doi":"10.1016/j.radmeas.2024.107307","DOIUrl":"10.1016/j.radmeas.2024.107307","url":null,"abstract":"<div><div>Dose conversion coefficients attempt to harmonize the material-, location-, and exposure-dependent results from retrospective dosemeters. The issues and uncertainties arising from dose conversion are explored within the framework of an interlaboratory comparison exercise in which mobile phones were positioned around anthropomorphic phantoms and exposed to non-uniform photon fields, with the glass and resistors they contain employed as fortuitous dosemeters. The difficulties of adopting pre-calculated tables of generic conversion coefficients are evaluated first, and then compared against those arising through the use of bespoke data derived by Monte Carlo modelling, and also against not converting the doses measured by the phones. It is seen that the different subjective choices that users might make when selecting ‘optimal’ generic data can lead to a significant source of uncertainty (up to around 70 %), though may be improved (to around 30 %) by appropriate quality controls. Use of generic coefficients typically led to over-estimates of the organ doses: an average discrepancy of ca. a factor of 2 was found, but this is still better than the factor of around 3 observed when no conversion coefficients were applied. Use of bespoke conversion factors led to the best estimates of organ doses, although they still over-estimated by approximately 1.5 on average, and an uncertainty of around 20 % was associated with generating their values. Overall, applying bespoke conversion data improves but does not guarantee correct dose categorization of individuals, with the inconsistences in the measured results found generally to be the limiting factor in obtaining accurate dose assessments.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"179 ","pages":"Article 107307"},"PeriodicalIF":1.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526727","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":"Preliminary ESR dating results of fault barite shed new insights into the retrospective history of bedrock fault activities in basaltic regions","authors":"Chuanyi Wei ,&nbsp;Gongming Yin ,&nbsp;Yongsheng Zhou ,&nbsp;Chunru Liu ,&nbsp;Li Cheng ,&nbsp;Xi Ma ,&nbsp;Hao Ji ,&nbsp;Jiaxiang Dang","doi":"10.1016/j.radmeas.2024.107306","DOIUrl":"10.1016/j.radmeas.2024.107306","url":null,"abstract":"<div><div>The chronology of fault activity in bedrock is critical to constraining and understanding periods of active faulting, assessing seismic hazards, and mitigating the effects of earthquakes. However, because of the lack of suitable materials for dating, the temporal reconstruction of faulting in bedrock remains highly challenging for geologists. In the present study, we determine for the first time the electron spin resonance (ESR) ages of fault barite (BaSO₄), which is produced by episodes of intense faulting on basalt bedrock fault surfaces. Three barite samples were obtained from a basalt fault section (27°5′23″N, 100°25′45″E, 1.8 km above sea level) of the Lijiang–Xiaojinhe Fault (LXF), southeastern Tibetan Plateau, for ESR measurements. Similar to marine barite, the ESR spectrum of fault barite shows an electron-type center with g = 2.0037, 2.0034, and 2.0028 attributed to SO₃⁻. The signal intensity systematically increased with increasing gamma-ray dose. Dose rates were calculated using a model based on the location and burial depth of the barite samples, as well as their surrounding bedrock. The three barite samples yield ESR ages of 131 ± 26, 503 ± 61, and 1416 ± 246 ka, respectively, which indicate that the LXF was active during the Early and Middle Pleistocene. The three ESR ages for fault barite from basalt extend the time range of activity of the LXF compared with previous carbonate ESR and radiocarbon dating results. Consequently, we propose that ESR dating of barite is valuable for reconstructing the history of bedrock fault activity. However, given that this investigation represents a preliminary application of the fault-barite ESR method, further study is needed to confirm its usefulness and the accuracy and precision of dating results.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107306"},"PeriodicalIF":1.6,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420481","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":"Characterization of a real time dosimetry system using 2D nano and micro-coatings in proton and carbon therapeutic ion beams","authors":"Luana de Freitas Nascimento ,&nbsp;Marijke De Saint-Hubert ,&nbsp;Marco Caprioli ,&nbsp;Laurence Delombaerde ,&nbsp;Katleen Himschoot ,&nbsp;Dirk Vandenbroucke ,&nbsp;Paul Leblans ,&nbsp;Wouter Crijns ,&nbsp;Satoshi Kodaira","doi":"10.1016/j.radmeas.2024.107303","DOIUrl":"10.1016/j.radmeas.2024.107303","url":null,"abstract":"<div><div>Real-time radioluminescence two-dimensional coatings have potential as dosemeters in proton and carbon therapeutic beams. We investigated coatings made of nano and micro-(C₄₄H₃₈P₂)MnCl₄ and (C₃₈H₃₆P₂)MnBr₄ crystals mixed with a water-equivalent substrate. The response of the radioluminescence signal of the coatings along the Bragg curves presented an ionization quenching effect, but less prominent than what has been observed in our previous works using Al₂O₃:X (X = C and C,Mg) coatings. We hypothesize that this results from their lower crystal sizes and effective atomic number (Z_eff). Combined experimental results and Monte Carlo simulations resulted in correction factors to address the linear energy transfer dependence and restore the constant response for particle therapy beams. The quenching correction method was applied to the studied proton and carbon ion beams and yielded the best results for the nano-(C₄₄H₃₈P₂)MnCl_4, coating, followed by the micro-(C₄₄H₃₈P₂)MnCl₄, nano-(C₃₈H₃₆P₂)MnBr₄, and micro-(C₃₈H₃₆P₂)MnBr₄.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107303"},"PeriodicalIF":1.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420480","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":"High-sensitivity ferrous sulfate dosimeters with wide dosimetry range based on fluorescence properties of gold nanoclusters","authors":"Yu Chen,&nbsp;Shuquan Chang,&nbsp;Xiaodan Hu,&nbsp;Xiaohong Zhang,&nbsp;Haiqian Zhang","doi":"10.1016/j.radmeas.2024.107304","DOIUrl":"10.1016/j.radmeas.2024.107304","url":null,"abstract":"<div><div>With the widespread application of nuclear technologies, radiation dose measurement is important. Ferrous sulfate dosimeters are common chemical dosimeters, but their high detection limit and narrow dosimetry range limit their application in some fields. In this work, we introduce a novel dosimetry approach for ferrous sulfate dosimeters utilizing the fluorescence properties of gold nanoclusters (AuNCs) capped with histidine. The Fe²⁺ ions in the ferrous sulfate dosimeter are oxidized to Fe³⁺ ions during irradiation. The presence of Fe³⁺ ions results in the fluorescence quenching of AuNCs, establishing a correlation between the fluorescence intensity of the dosimeter and irradiation doses. The lowest detection limit of the fluorescence dosimeter was found to be 2 Gy. Moreover, the dose response of the dosimeter showed good linearity within the dose range of 2–400 Gy. The dosimetric sensitivity of the fluorescence dosimeter was 17.9% higher than that of ultraviolet–visible spectroscopy. The results indicate that the dosimetry method utilizing the fluorescence properties of AuNCs significantly improves the detection sensitivity and detection limit of the dosimeter. Our work provides a new dosimetry method for ferrous sulfate dosimeters that can be used in a wider range of irradiation situations.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107304"},"PeriodicalIF":1.6,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357306","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":"Implementation and optimisation of cosmic veto system using digital electronics in an environmental gamma-spectrometry laboratory","authors":"Luka Bakrač ,&nbsp;Tomislav Ilievski ,&nbsp;Nikola Marković ,&nbsp;Damir Bosnar ,&nbsp;Ivana Tucaković","doi":"10.1016/j.radmeas.2024.107302","DOIUrl":"10.1016/j.radmeas.2024.107302","url":null,"abstract":"<div><div>This paper presents a detailed description of construction and introduction of an assembly for cosmic veto system at the Laboratory for radioecology of the Ruđer Bošković Institute in Zagreb. It is a typical surface laboratory for environmental radioactivity measurements using HPGe detectors. In surface level laboratories a large part of the background signal is caused by radiation produced by cosmic radiation, mostly by muons. It leads to limiting factors for reaching low detection limits, essential in environmental sample measurements, where relatively low activity concentrations are expected. Thus, reduction of cosmic component of background becomes a requirement, but also a challenge and an expense for already set routine gamma spectrometric laboratories. This paper offers a detailed description of materials and steps needed for construction and implementation of such an assembly as a guideline for other laboratories. The homebuilt veto system presented here is based on large scintillator plates covering the existing passive lead shielding. For the easy and rapid characterization of the veto system, a newly acquired digitizer was used. More specifically, the timestamping capabilities of the CAEN DT5781 MCA were used to identify the coincidences caused by muons between the scintillators and the HPGe. With the 3 plates added, a reduction factor of 2.4 was achieved, reducing the count rate between 40 keV and 2700 keV from 0.58 cps to 0.27 cps. After the full characterization of the veto system, the setup was transferred back to the previously used Canberra DSA, more suitable for routine measurements. This step and its description are lacking in the existing literature, while it is very valuable for the laboratories already set up for the environmental measurement. The additional advantages of a homebuilt system are the modularity and multi-purpose of the system which can later be used for different applications.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107302"},"PeriodicalIF":1.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320189","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":"Single-photon elimination in liquid scintillation counting with pulse shape discrimination and delayed coincidence","authors":"Pengpeng Zhang ,&nbsp;Deyuan Li ,&nbsp;Hui Li ,&nbsp;Hui Zhang ,&nbsp;Xuanru Zhang ,&nbsp;Yan Ma ,&nbsp;Linjing Wang ,&nbsp;Hua Li ,&nbsp;Xuewen Yan","doi":"10.1016/j.radmeas.2024.107299","DOIUrl":"10.1016/j.radmeas.2024.107299","url":null,"abstract":"<div><div>Liquid scintillation counting is widely used in the rapid measurement of beta activity in environmental and biological samples. However, the single-photons generated by chemiluminescence and photoluminescence in liquid scintillation cocktails seriously affect the measurement accuracy of low-energy beta activity. A novel method based on the combination of the signal characteristic analysis and selective gate to eliminate the single-photon signal was developed. A preprocessing circuit made of a fast response time photomultiplier tube (PMT, Hamamatsu R9420), two charge-sensitive preamplifiers (CSP), two comparators, an analog switch and delay-line devices were designed and developed to verify the feasibility and effectiveness. The output signals from the last dynode were characterized in the pulse time and were used to discriminate the beta signals from the single-photon ones. The beta signals were “tagged” through pulse width detection, pulse width-amplitude transform and pulse-height discrimination with the first comparator, the first CSP and the second comparator. The “tagged” beta signal were applied to control the analog switch. The anode signals were specially delayed and then selected by the analog switch to achieve the single-photon signal elimination. Liquid scintillation cocktails containing <span><math><mrow><msup><mrow></mrow><mrow><mn>14</mn></mrow></msup><mi>C</mi></mrow></math></span> or NaOH used as beta or single-photon sources were provided to verify the feasibility of the principle. The results showed that the typical fall time of the single-photon and beta signal was 16.05<!--> <!-->ns and 43.17<!--> <!-->ns. The single-photon rejection ratio is 2.76 × 10<span><math><msup><mrow></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></math></span> ± 3.89 × 10<span><math><msup><mrow></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup></math></span>, and the detection efficiency is up to <span><math><mrow><mn>93</mn><mo>.</mo><mn>02</mn><mtext>%</mtext><mo>±</mo><mn>0</mn><mo>.</mo><mn>59</mn><mtext>%</mtext></mrow></math></span>.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107299"},"PeriodicalIF":1.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312632","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":"3D printed microcrystalline CsI:Tl composite scintillating thin films for X-ray imaging","authors":"Divya Pandya ,&nbsp;Nisha Oad ,&nbsp;Sheetal Rawat ,&nbsp;Brijesh Tripathi ,&nbsp;Pavan Gurrala ,&nbsp;Partha Sarathi Sarkar ,&nbsp;Mohit Tyagi ,&nbsp;Apoorva Bhatt","doi":"10.1016/j.radmeas.2024.107301","DOIUrl":"10.1016/j.radmeas.2024.107301","url":null,"abstract":"<div><div>The utilization of additive manufacturing techniques, especially Digital Light Printing (DLP), in fabricating CsI:Tl scintillator films demonstrates considerable potential for streamlining the production of scintillators tailored for X-ray imaging applications. This research focuses on the fabrication of CsI:Tl-based composite plastic scintillator thin films. In this study, circular films measuring 1-inch in diameter and 0.1 mm &amp; 0.2 mm in thickness are being produced and tested for gamma photon counts under alpha and gamma radiation. To establish the stopping power range of the films, a Monte Carlo based GEANT4 simulation has been carried out. Additionally, investigations into their suitability for X-ray imaging applications are being conducted, revealing the spatial resolution of the films (0.2 and 0.1 mm) between 100 and 130 μm and 1.26 lp/mm with a contrast range of 4.0–12.3 %. The observed decrease in spatial resolution and contrast for the 0.2 mm thick film is attributed to the thickness increase exacerbating the scattering phenomenon while simultaneously enhancing the X-ray stopping power. This highlights the significance of inherent trade-off between maximizing spatial resolution and compromising light yield of 0.1 mm films compared to the 0.2 mm thick film. By utilizing 3D printing, this approach offers a cost-effective and time-efficient method for producing thin-film scintillators with enhanced flexibility and customization options compared to conventional methods.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"178 ","pages":"Article 107301"},"PeriodicalIF":1.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312779","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}