Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献

{"title":"Hydrogen depth profiling using 2D-ERDA with 100 keV 4He+ ion beams","authors":"Jiho Song ,&nbsp;Chang Seon Park ,&nbsp;Wansup Kim,&nbsp;Changsik Sim,&nbsp;Kyungsu Park,&nbsp;DaeWon Moon,&nbsp;Soobang Kim,&nbsp;Jong Hun Kim,&nbsp;Won Ja Min","doi":"10.1016/j.nimb.2026.166036","DOIUrl":"10.1016/j.nimb.2026.166036","url":null,"abstract":"<div><div>Time-of-Flight Medium Energy Ion Scattering (ToF-MEIS) provides the compositional depth profile of a sample using medium-energy light ions with energies of approximately 100<!--> <!-->keV to 500<!--> <!-->keV. When projectiles impinge on samples, some are scattered by target nuclei, while others induce elastic recoil; the resulting hydrogen recoils can be detected using a ToF analyzer.</div><div>When a ToF analyzer is used with a 100<!--> <!-->keV <span><math><mrow><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup><msup><mrow><mi>He</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span> beam, hydrogen nuclei recoiling from depths beyond 21<!--> <!-->nm overlap on the ToF axis by the higher count rate of forward-scattered <span><math><mrow><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup><mi>He</mi></mrow></math></span> particles. Thus, quantitative hydrogen profiling in hydrogenated diamond-like carbon (H-DLC) is effectively limited to depths of 21<!--> <!-->nm.</div><div>To overcome the depth limit, 2-Dimensional–Elastic Recoil Detection Analysis was proposed, which separates ions from neutral atoms so that the energy and velocity of each ion species can be measured. Thus, individual energy spectra for each light element can be obtained without overlap. Herein, the experiment was performed using a ToF-MEIS incorporating a deflector as a simple electrostatic analyzer, along with a delay line detector. Using scattering at 100<!--> <!-->keV <span><math><mrow><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup><msup><mrow><mi>He</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span>, <span><math><mrow><msup><mrow></mrow><mrow><mn>1</mn></mrow></msup><msup><mrow><mi>H</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span>, <span><math><mrow><msup><mrow></mrow><mrow><mn>1</mn></mrow></msup><msup><mrow><mi>H</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span>recoils were successfully separated from forward-scattered He ions, and hydrogen concentration in H-DLC was analyzed quantitatively up to a depth of 42<!--> <!-->nm.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166036"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080702","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":"Surface emission studies of ion-beam bombarded thin melamine coatings on carbon substrates","authors":"L. Redigolo ,&nbsp;I. Lombardo ,&nbsp;D. Dell’Aquila ,&nbsp;M. Vigilante ,&nbsp;S. Carturan ,&nbsp;A. Massara ,&nbsp;L. Baldesi ,&nbsp;S. Barlini ,&nbsp;A. Camaiani ,&nbsp;G. Casini ,&nbsp;C. Ciampi ,&nbsp;M. Cicerchia ,&nbsp;M. D’Andrea ,&nbsp;D. Fabris ,&nbsp;B. Gongora-Servin ,&nbsp;F. Gramegna ,&nbsp;T. Marchi ,&nbsp;A. Ordine ,&nbsp;G. Pasquali ,&nbsp;S. Piantelli ,&nbsp;G. Verde","doi":"10.1016/j.nimb.2026.166049","DOIUrl":"10.1016/j.nimb.2026.166049","url":null,"abstract":"<div><div>The knowledge of nitrogen content evolution in organic targets, as a function of beam fluence and surface roughness, is crucial in several research and applied fields. We investigated the degradation of melamine (C<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>H<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span>N<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span>) coatings, deposited on very thin carbon layers, under ion-beam bombardment at high-power density (<span><math><mrow><mo>≈</mo><mn>150</mn><mspace></mspace><msup><mrow><mi>W/m</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>). Two types of effects due to the ionic collisions are observed: a prompt ejection of nitrogen atoms, occurring at a low particle fluence, and a subsequent, much slower, release of nitrogen, leading to a saturation-like effect. A detailed analysis of several long-lasting measurements with different layers revealed interesting inverse correlations between the yields of nitrogen ejections and the particle flux. Further, the damage cross section of melamine, leading to nitrogen emission during the slow phase, seems strongly connected to the surface roughness of the carbon backing used to host the melamine material.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166049"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385779","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":"Non-Gaussian straggling in SIMNRA 8","authors":"M. Mayer","doi":"10.1016/j.nimb.2026.166042","DOIUrl":"10.1016/j.nimb.2026.166042","url":null,"abstract":"<div><div>An improved description of non-Gaussian energy straggling was introduced in SIMNRA 8. The various energy straggling components (electronic energy-loss straggling, energy spread by multiple scattering, geometrical energy spread) are approximated by asymmetric two-piece super/sub Gaussian functions. A fast algorithm for approximate convolution of these functions has been developed, resulting in convoluted functions with correct mean value, variance and third moment but approximate shape. This allows a more accurate simulation of geometrical energy spread and/or of effects where the Vavilov-shape of electronic energy-loss straggling plays a role, for example in simulating the Lewis effect in PIGE. A new Lewis-like effect in particle scattering is predicted.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166042"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385715","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":"Optimized design of the thermionic cathode injector for the 1.0 GeV linear accelerator at the WALS","authors":"Jia Li ,&nbsp;Zeyi Dai ,&nbsp;Xinwu Yu ,&nbsp;Xuyang Qiao ,&nbsp;Yongjin Ding ,&nbsp;Dengshi Shi ,&nbsp;Hongwei Yue ,&nbsp;Yuancun Nie","doi":"10.1016/j.nimb.2026.166029","DOIUrl":"10.1016/j.nimb.2026.166029","url":null,"abstract":"<div><div>Thermionic cathode injection systems are widely adopted for commissioning advanced light sources and linear accelerators due to their high bunch charge and operational reliability, and this robustness also makes them the preferred choice for high-dose irradiation accelerators. The 1.0 GeV linear accelerator at Wuhan University adopts a dual-injector scheme, where the thermionic cathode injector must satisfy compatibility with the photocathode injector beamline and adhere to the spatial constraints of the laboratory corridor, necessitating a compact layout design. This paper focuses on the optimized design of the tapered buncher, which is commonly integrated with thermionic cathode gun to deliver stable and high-quality electron beams, with phase velocity design as the primary optimization objective​​. Two design methodologies, numerical optimization and particle tracking optimization, were applied to determine the structural parameters of the buncher. Start-to-end optimization of the beamline incorporating space charge effects was performed by using the General Particle Tracer software, achieving matching between the injector exit beam and the main accelerator. Optimization calculations were further conducted for different injected charge levels, all yielding a transmission efficiency exceeding 60%.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166029"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385773","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":"The ion beam-induced luminescence on perovskite films with surface passivation based on ligand modulation","authors":"Yuetong Ma ,&nbsp;Junyan Li ,&nbsp;Xiao Ouyang ,&nbsp;Guojing Wang ,&nbsp;Menglin Qiu ,&nbsp;Shasha Lv","doi":"10.1016/j.nimb.2026.166040","DOIUrl":"10.1016/j.nimb.2026.166040","url":null,"abstract":"<div><div>The monodisperse cubic-phase CsPbBr₃ thin films were synthesized based on stabilizer-assisted colloidal method, with oleic acid and octylamine as dual ligands. The effect of octylamine concentration on the microstructure and luminescence properties was systematically investigated. Characterization techniques were employed to analyze the film morphology, crystallinity, and optical characteristics. It is found that octylamine concentration critically governs perovskite crystal growth kinetics and defect passivation efficiency. Increasing octylamine concentration has progressively enlarged grain size, reduced the bandgap, and caused emission red-shifting, which is consistent with the shift in the UV–Vis absorption edge. The films with low octylamine concentration got well-dispersed particles but the reduced crystallinity, and the medium concentration produced a bimodal crystal size distribution and dual PL emission peaks at 515 nm and 539 nm. While, the high octylamine concentration induced surface cracks and defects, resulting in a drastic decrease in luminescence intensity. Ion beam-induced luminescence (IBIL) further confirmed the ligand modulation effect on luminescence, showing a red-shifted peak at 570 nm corresponding to the PL results. The octylamine ligands enable effective tuning of CsPbBr₃ film microstructure and optical properties by regulating crystal nucleation/growth and surface passivation. It provides a critical insights for optimizing perovskite luminescent materials through ligand engineering.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166040"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385774","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":"Analysis of sexual supplements with ion beam analytical techniques","authors":"G.M.S. Souza ,&nbsp;G.C. Touguinha ,&nbsp;L.P. Silva ,&nbsp;M.R. Caloni ,&nbsp;L.K. Pezzin ,&nbsp;D.N.J. Bilhalva ,&nbsp;H. Hub ,&nbsp;H. Trombini ,&nbsp;L. Amaral ,&nbsp;J.F. Dias","doi":"10.1016/j.nimb.2026.166035","DOIUrl":"10.1016/j.nimb.2026.166035","url":null,"abstract":"<div><div>The aim of this work is to study sexual supplements commercialized through the e-market in Brazil in order to evaluate their elemental and molecular composition. To that end, eight different supplements sold over the internet were analyzed with Rutherford Backscattering Spectrometry (RBS), Particle-Induced X-ray Emission (PIXE) and Secondary Ion Mass Spectrometry with MeV primary ions (MeV-SIMS).</div><div>In general, the PIXE results show that light elements from Na to Ca have concentrations ranging from 10³ ppm up to 10⁵ ppm, while heavier elements have concentrations below 500 ppm. High concentrations of Mg, K and Ca were found in the supplements, while elements like Ni and Cu were present in trace levels.</div><div>Despite some similarities were found between maca root and the supplements studied in this work, it was not possible to establish that maca root was the sole ingredient of the supplements. Statistical analysis of the elemental concentration reveals strong correlations among brands from the same manufacturer. The molecular signature obtained through MeV-SIMS experiments corroborates the strong similarities found for two brands, thus suggesting that different brands might be related to the same supplement content.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166035"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385716","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":"Terrain-dependent shielding factors of cosmic rays on Earth’s surface","authors":"Dingxiong Chen ,&nbsp;Hongtao Shen ,&nbsp;Wenqiao Liu ,&nbsp;Lingrong Du ,&nbsp;Xinya Huang ,&nbsp;Weixin Chen ,&nbsp;Xu Wang ,&nbsp;Jiawen Wang ,&nbsp;Fen Luo ,&nbsp;Ming He ,&nbsp;Qingzhang Zhao ,&nbsp;Kimikazu Sasa ,&nbsp;Shan Jiang","doi":"10.1016/j.nimb.2026.166017","DOIUrl":"10.1016/j.nimb.2026.166017","url":null,"abstract":"<div><div>The production rate of cosmogenic nuclides is not only related to altitude and latitude, but also influenced by topographic shielding and the elemental composition of rock layers. Due to topographic obstruction, a shielding factor calculation model must be established in practical geoscientific applications. This study considers five geometric topographic terrains: Sloping terrains, Hemispherical protrusions, Concave spherical cavities, Hemispherical dimples, and Cylindrical cavities. Using MATLAB programs, we numerically computed their respective shielding factors and derived fitted formulas for calculating the shielding factors of these terrains. This facilitates the determination of cosmogenic nuclide concentrations in common landforms for geological studies. The research provides a practical and convenient computational method for estimating the production rate of cosmogenic nuclides and exposure age in geophysical studies.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166017"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385733","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":"AMS measurements of tritium in thermal column graphite from a decommissioned nuclear reactor","authors":"Hongtao Shen ,&nbsp;Fen Luo ,&nbsp;Junsen Tang ,&nbsp;Xu Wang ,&nbsp;Jiawen Wang ,&nbsp;Xinya Huang ,&nbsp;Lingrong Du ,&nbsp;Wenqiao Liu ,&nbsp;Weixin Chen ,&nbsp;Dingxiong Chen ,&nbsp;Jiajie Hu ,&nbsp;Qinzhang Zhao ,&nbsp;Ming He ,&nbsp;Kimikazu Sasa ,&nbsp;Shan Jiang","doi":"10.1016/j.nimb.2026.166013","DOIUrl":"10.1016/j.nimb.2026.166013","url":null,"abstract":"<div><div>As a specialized carrier of radioactive substances, thermal column graphite continuously records and reflects radiation characteristics during reactor operation. Tritium (³H) is one of the primary radionuclides released by nuclear facilities. Determining its content in thermal column graphite provides critical insights for the design and development of new reactor components and materials, as well as for ageing assessment and service life prediction of nuclear facility equipment. In this study, samples from the inner, middle, and outer layers of the thermal column graphite of China’s decommissioned 101 Heavy Water Reactor were analyzed. A separation and purification method for ³H was established, and the accumulated Tritium was quantitatively analyzed using the Accelerator Mass Spectrometry system at Guangxi Normal University (GXNU-AMS). The results demonstrate the successful separation of ³H from thermal column graphite at the 10 μg level, with significant variations in ³H radioactivity observed across different positions: the inner layer exhibited the highest activity at 81 Bq/g, while the outer layer showed the lowest activity at only 0.37 Bq/g.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166013"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015897","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":"Measurements of activation cross sections and isomeric cross-section ratio of the 197Au(n,2n) reactions in the 13.57–14.86 MeV energy range","authors":"Yueli Song ,&nbsp;Fengqun Zhou ,&nbsp;Yong Li ,&nbsp;Pengfei Ji ,&nbsp;Yajuan Hao ,&nbsp;Xiaojun Sun ,&nbsp;Xiaopeng Zhang","doi":"10.1016/j.nimb.2026.166050","DOIUrl":"10.1016/j.nimb.2026.166050","url":null,"abstract":"<div><div>Cross sections and the isomeric cross-section ratio of the ¹⁹⁷Au(n<em>,</em>2n) reaction were measured in the 13.57–14.86 MeV neutron energy range using the activation technique combined with high-resolution off-line gamma-ray spectrometry. The excitation function curves of the ¹⁹⁷Au(n,2n)^196m2Au, ¹⁹⁷Au(n,2n)^196g+m1Au, and ¹⁹⁷Au(n,2n)¹⁹⁶Au reactions, as well as the curve that represents the isomeric cross-section ratio changes with neutron energy, were calculated using TALYS-1.95. The experimental data were analysed and compared with previous measurements, evaluated nuclear data, and theoretical predictions. The experimental data obtained at selected neutron energies are in agreement with some results of previous experiments at comparable energies and with the theoretical curves calculated using TALYS-1.95 at the corresponding energies. In particular, for the cross section of the ¹⁹⁷Au(n,2n)^196g+m1Au reaction and the isomeric cross-section ratio, the present experimental results show excellent agreement with the theoretical calculations. This work provides valuable data for enriching and improving the neutron-induced reaction cross-section database and for advancing related application research.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166050"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385712","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":"Development of AMS 14C dating preparation laboratory at the Beijing Normal University","authors":"Hong Wang ,&nbsp;Lin Liu ,&nbsp;Xiaolei Zhao ,&nbsp;Tianhe Liu ,&nbsp;Yi Yang ,&nbsp;Peng Cheng ,&nbsp;Hua Du ,&nbsp;Peixian Shu ,&nbsp;Xiuchen Wu ,&nbsp;Weijian Zhou ,&nbsp;Zhisheng An","doi":"10.1016/j.nimb.2026.166053","DOIUrl":"10.1016/j.nimb.2026.166053","url":null,"abstract":"<div><div>The development of the AMS ¹⁴C dating preparation laboratory has been completed in the Beijing Normal University. Two vacuum lines for sample combustion and hydrolysis and 4 graphitization systems were installed. One miniaturized pyrolysis-combustion device interfaced with online Infrared Gas Analyzer (IRGA) and Fourie Transfer Infrared Spectroscopy (FTIR) is connected to one vacuum system. The other vacuum system with 12 ports is used simply for evacuation. Total of 44 H₂/Fe reactors with user friendly semi-automated operating systems have capability for a large sample throughput. Results of the graphitized blanks, intercomparison samples with 1 and 2 half-life of ¹⁴C, and OXII standards materials measured at the 1MV multi-element AMS system from the High Voltage of Engineering Europa at the BNU are discussed.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"573 ","pages":"Article 166053"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385717","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}