Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献_第10页

Energy calibration and stability of the 3 MV accelerator at CIRCE for applications in Nuclear Astrophysics 中国核天体物理研究中心3mv加速器能量标定与稳定性研究

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-21 DOI: 10.1016/j.nima.2025.170429

R. Buompane , L. Gialanella , F. Terrasi , G.F. Ciani , A. Di Leva , J.G. Duarte , L.R. Gasques , F. Marzaioli , L. Morales-Gallegos , G. Porzio , C. Santonastaso , D. Rapagnani

{"title":"Energy calibration and stability of the 3 MV accelerator at CIRCE for applications in Nuclear Astrophysics","authors":"R. Buompane , L. Gialanella , F. Terrasi , G.F. Ciani , A. Di Leva , J.G. Duarte , L.R. Gasques , F. Marzaioli , L. Morales-Gallegos , G. Porzio , C. Santonastaso , D. Rapagnani","doi":"10.1016/j.nima.2025.170429","DOIUrl":"10.1016/j.nima.2025.170429","url":null,"abstract":"<div><div>A 3 MV NEC 9SDH-2 Pelletron accelerator is installed at the Center for Isotopic Research on Cultural and Environmental Heritage of Dipartimento di Matematica e Fisica, Università degli Studi della Campania “Luigi Vanvitelli”, Caserta (CIRCE-DMF). The accelerator serves several beam lines devoted to both applied and fundamental research. While generally a precise and accurate knowledge of the energy of the charged particle beams is of interest for all applications, the measurement of charged particle nuclear reactions of astrophysical energies is particularly demanding because of the strong energy dependence of the cross section below the Coulomb barrier and the very long duration of the measurements. We describe here the energy calibration of the accelerator installed at CIRCE-DMF and a measurement of the short term stability. A routine to improve the long term stability and remove the observed dependence of the terminal voltage on the injected current was successfully tested. Finally, possible improvements are discussed.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170429"},"PeriodicalIF":1.5,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705958","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}

引用次数: 0

Characterisation of radioactive decay series by digital autoradiography, part 2: Experimental evidence of time and space coincidences (TSCs) on geo-materials 用数字放射自显影法描述放射性衰变系列，第2部分：地质材料的时间和空间巧合（tsc）的实验证据

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-20 DOI: 10.1016/j.nima.2025.170439

J. Donnard , P. Sardini , M. Descostes

{"title":"Characterisation of radioactive decay series by digital autoradiography, part 2: Experimental evidence of time and space coincidences (TSCs) on geo-materials","authors":"J. Donnard , P. Sardini , M. Descostes","doi":"10.1016/j.nima.2025.170439","DOIUrl":"10.1016/j.nima.2025.170439","url":null,"abstract":"<div><div>The BeaQuant gas detector is a real-time digital autoradiography system that sequentially acquires alpha and beta emissions from natural decay chains. Each emission is identified according to the type of particle emitted (alpha or beta), and the time and position of emergence in two dimensions. The experimental data generated were interpreted using an algorithm to identify Time and Space Coincidences (TSCs). Three different TSCs were detected on a thin section of uranium ore at secular equilibrium. These α/α, α/α/α and β/α coincidences come from three short-lived radionuclides: <sup>215</sup>Po and <sup>219</sup>Rn in the <sup>235</sup>U chain, and <sup>214</sup>Po in the <sup>238</sup>U chain. The distribution of the differences in arrival times of the particles forming a coincidence was analysed in terms of half-life. This analysis confirmed that these three coincidences originated from these three radionuclides, the periods having been found experimentally. The theoretical calculations of the number of coincidences confirm those obtained by the algorithm for analysing the experimental autoradiographic data.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170439"},"PeriodicalIF":1.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684648","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}

引用次数: 0

CMS RPC L1 Trigger clustering at CMSSW CMS RPC L1在CMSSW触发集群

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-20 DOI: 10.1016/j.nima.2025.170363

C. Giordano , M. Tytgat , K. Mota Amarilo , A. Samalan , K. Skovpen , G.A. Alves , E. Alves Coelho , F. Marujo da Silva , M. Barroso Ferreira Filho , E.M. Da Costa , D. De Jesus Damiao , B.C. Ferreira , S. Fonseca De Souza , L. Mundim , H. Nogima , J.P. Pinheiro , A. Santoro , R. Gomes De Souza , M. Thiel , A. Aleksandrov , J. Eysermans

{"title":"CMS RPC L1 Trigger clustering at CMSSW","authors":"C. Giordano , M. Tytgat , K. Mota Amarilo , A. Samalan , K. Skovpen , G.A. Alves , E. Alves Coelho , F. Marujo da Silva , M. Barroso Ferreira Filho , E.M. Da Costa , D. De Jesus Damiao , B.C. Ferreira , S. Fonseca De Souza , L. Mundim , H. Nogima , J.P. Pinheiro , A. Santoro , R. Gomes De Souza , M. Thiel , A. Aleksandrov , J. Eysermans","doi":"10.1016/j.nima.2025.170363","DOIUrl":"10.1016/j.nima.2025.170363","url":null,"abstract":"<div><div>The Compact Muon Solenoid detector at the Large Hadron Collider is a multipurpose experiment designed for studying proton–proton and heavy-ion collisions. It features a 3.8 T Solenoid magnet, a Silicon tracker, Electromagnetic and Hadronic Calorimeters, and the Muon system. For the High Luminosity LHC, CMS will undergo Phase-2 upgrades to handle higher collision rates, with PileUp increasing from 50 to 140/200 interactions per bunch crossing, collision energy reaching 14 TeV, and peak luminosity rising to <span><math><mrow><mn>5</mn><mo>−</mo><mn>7</mn><mo>.</mo><mn>5</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>34</mn></mrow></msup></mrow></math></span> <span><math><mrow><mi>c</mi><msup><mrow><mi>m</mi></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><msup><mrow><mi>s</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>. These upgrades aim to enable even more precise Standard Model measurements, improvements in the Higgs sector, and searches for Beyond Standard Model physics. This document describes the main features of the Endcap Muon Track Finder ++ algorithm, developed in the CMS Software; it is the Level 1 Trigger algorithm upgrade being developed for Phase-2 of the currently used Endcap Track Finder. The efficiency of the algorithm was computed on simulations generated with and without RPC and iRPC ((i)RPC) information, using a pre-trained model.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170363"},"PeriodicalIF":1.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705921","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}

引用次数: 0

Portable distortion free large solid angle coverage detector 便携式无失真大立体角覆盖检测器

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-20 DOI: 10.1016/j.nima.2025.170446

Vivek V. Nagarkar , Guillermo Velasco , Jun Wang , Nicholas Anastasi , Stuart Miller , Andrew Frost , Michael Costa , Matthew Loyd , Theodore Visscher , Cornelius Donahue Jr. , Christopher A. Montcalm , Yacouba Diawara , Richard Riedel , Bipin Singh

{"title":"Portable distortion free large solid angle coverage detector","authors":"Vivek V. Nagarkar , Guillermo Velasco , Jun Wang , Nicholas Anastasi , Stuart Miller , Andrew Frost , Michael Costa , Matthew Loyd , Theodore Visscher , Cornelius Donahue Jr. , Christopher A. Montcalm , Yacouba Diawara , Richard Riedel , Bipin Singh","doi":"10.1016/j.nima.2025.170446","DOIUrl":"10.1016/j.nima.2025.170446","url":null,"abstract":"<div><div>Neutron single crystal diffractometers require large solid angle coverage for optimum performance. This can be achieved by tiling flat detectors in a cylindrical or spherical geometry, but results in large gaps in detector coverage and parallax distortion. The detector edges exhibit degraded resolution, distortion, and gamma rejection. Since the detector edge regions are a significant fraction of the detector active area, they must be removed from the experimental data set, requiring extra beam time to collect enough analysis data. A spherical detector with a continuous surface would effectively address this issue while eliminating most boundary ‘dead’ areas. Here we report on the development of a novel hemispherical shaped neutron detector using seamlessly tiled readout modules to form the desired shape. The heart of the detector is a specially developed curved neutron scintillator coupled to high resolution silicon photomultiplier (SiPM) Anger cameras via custom made fiber optic tapers (FOTs). The detector has been assembled and initial tests have been conducted at the High Flux Isotope Reactor (HFIR) beamlines at Oak Ridge National Laboratory (ORNL). Here, we describe details of the scintillator design, fabrication and characterization, evaluation of individual detector modules, the details of the detector design implementation, and evaluation of the assembled detector at ORNL beamlines.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170446"},"PeriodicalIF":1.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705959","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}

引用次数: 0

6LiI:Eu/LaBr3:Ce phoswich detector for detection and discrimination of thermal neutron and gamma radiation 6LiI:Eu/LaBr3:Ce光子探测器，用于热中子和伽马辐射的探测和识别

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-19 DOI: 10.1016/j.nima.2025.170428

D.S. Sisodiya , G.D. Patra , S.G. Singh , A.K. Singh , S. Pitale , M. Ghosh , Shashwati Sen

{"title":"6LiI:Eu/LaBr3:Ce phoswich detector for detection and discrimination of thermal neutron and gamma radiation","authors":"D.S. Sisodiya , G.D. Patra , S.G. Singh , A.K. Singh , S. Pitale , M. Ghosh , Shashwati Sen","doi":"10.1016/j.nima.2025.170428","DOIUrl":"10.1016/j.nima.2025.170428","url":null,"abstract":"<div><div>A phoswich detector consisting of <sup>6</sup>LiI:Eu (2 mm L x 25 mm dia) and LaBr<sub>3</sub>:Ce (20 mm L x 25 mm dia) single crystal is developed to detect and discriminate thermal neutrons and gamma radiation employing pulse shape discrimination (PSD) and pulse height discrimination. The thicknesses of the <sup>6</sup>LiI:Eu crystals is kept to ∼2 mm to make it transparent to high energy gamma along with maximum efficiency for thermal neutron detection. We are able to discriminate neutron interaction in <sup>6</sup>LiI:Eu from the gamma event detected in both LaBr<sub>3</sub>:Ce and <sup>6</sup>LiI:Eu by pulse height as well as PSD cutoffs. The figure of merit for discriminating thermal neutron (in <sup>6</sup>LiI:Eu) from high energy gamma radiation (in LaBr<sub>3</sub>:Ce) is approximately 11. Further, by adding a Bi<sub>4</sub>Ge<sub>3</sub>O<sub>12</sub> (BGO) crystal as top layer in this phoswich detector we can detect and discriminate charged particles like alpha and beta along with thermal neutron and gamma.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170428"},"PeriodicalIF":1.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685241","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}

引用次数: 0

Remote alpha/beta measurement system with support vector machine algorithm 基于支持向量机算法的远程alpha/beta测量系统

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-19 DOI: 10.1016/j.nima.2025.170368

Yuki Morishita , Hiroko Nakamura Miyamura , Yuki Sato , Jun Matsubara , Brian Sumali , Yasue Mitsukura

{"title":"Remote alpha/beta measurement system with support vector machine algorithm","authors":"Yuki Morishita , Hiroko Nakamura Miyamura , Yuki Sato , Jun Matsubara , Brian Sumali , Yasue Mitsukura","doi":"10.1016/j.nima.2025.170368","DOIUrl":"10.1016/j.nima.2025.170368","url":null,"abstract":"<div><div>Decommissioning nuclear reactor sites presents challenges due to the presence of various radionuclides, including alpha emitters (e.g., Pu, Am, <em>Cm</em>) and beta emitters (e.g., <sup>137</sup>Cs, <sup>90</sup>Sr–<sup>90</sup>Y), which pose significant internal exposure risks to workers. Traditional measurement methods require multiple instruments and are time-consuming, particularly in high gamma-ray environments. To address these issues, we developed a remote alpha and beta discrimination measurement system that integrates a stilbene scintillator detector with a silicon photomultiplier, enabling simultaneous detection of both alpha and beta particles. This study further incorporates machine learning techniques, specifically Support Vector Machines (SVM), for automatic discrimination, eliminating the need for user-defined thresholds and ensuring consistent operational conditions. The system was tested with known radiation sources, demonstrating over 96 % classification accuracy for alpha and beta particles. Measurements conducted in motion effectively identified contamination sources, confirming the system's capability for real-time analysis. This innovative approach enhances radiation safety and efficiency in nuclear decommissioning operations, making it particularly beneficial in environments where human access is limited.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170368"},"PeriodicalIF":1.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759509","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}

引用次数: 0

Preparation of lanthanide thin films for ion beam experiments and post irradiation characterization 离子束实验用镧系元素薄膜的制备及辐照后表征

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-18 DOI: 10.1016/j.nima.2025.170403

E. Artes , D. Ackermann , Ch.E. Düllmann , T. Häger , B. Kindler , T. Lefrou , B. Lommel , A.T. Loria Basto , C.-C. Meyer , C. Mokry , F. Munnik , J. Piot , L.E. Reed , D. Renisch , H. Rothard , J. Runke , H. Savajols , C. Stodel , T. Madi , V. Urbanova , A. Yakushev

{"title":"Preparation of lanthanide thin films for ion beam experiments and post irradiation characterization","authors":"E. Artes , D. Ackermann , Ch.E. Düllmann , T. Häger , B. Kindler , T. Lefrou , B. Lommel , A.T. Loria Basto , C.-C. Meyer , C. Mokry , F. Munnik , J. Piot , L.E. Reed , D. Renisch , H. Rothard , J. Runke , H. Savajols , C. Stodel , T. Madi , V. Urbanova , A. Yakushev","doi":"10.1016/j.nima.2025.170403","DOIUrl":"10.1016/j.nima.2025.170403","url":null,"abstract":"<div><div>The heaviest elements in the periodic table have a low production yield. In order to increase the production yield of the superheavy elements, thicker targets are required than the present molecular plating technique can offer. Therefore, lanthanide thin films, as lighter homologues to the actinides, were prepared by a new electrodeposition method. The trifluoromethanesulfonates (triflates) of the lanthanide salts were dissolved in Dimethylformamide (DMF) and then electrochemically deposited onto substrates of different geometries. These thin films were irradiated with different swift heavy ion beams with energies of over 200 MeV. Thin films were analyzed spectroscopically by Raman and IR measurements before and after irradiation, to investigate chemical changes induced by irradiation.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170403"},"PeriodicalIF":1.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685246","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}

引用次数: 0

Estimation of the neutron yield generated by neutron source based on pulsed power proton accelerator in 7Li(p, n)7Be reaction 基于脉冲功率质子加速器的7Li(p, n)7Be反应中子源中子产率估算

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-18 DOI: 10.1016/j.nima.2025.170442

S.H. Li , S. Pavlov , Yu Cherepennikov , P. Glumac , M. Zhuravlev , G. Kurapov , A. Bukharkin , G. Remnev

引用次数: 0

Measurement of low 222Rn concentration in N2 using an activated charcoal trap 用活性炭捕集器测量N2中低222Rn浓度

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-18 DOI: 10.1016/j.nima.2025.170422

N. Fatemighomi, Y. Ahmed, S.M.A. Hussain, J. Lu, A. Pearson, J. Suys

引用次数: 0

Handheld multipurpose radionuclide identification device employing multilayered phoswich technology 采用多层光导技术的手持式多用途放射性核素识别装置

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-17 DOI: 10.1016/j.nima.2025.170437

Ville P. Bogdanoff , Kari A. Peräjärvi

{"title":"Handheld multipurpose radionuclide identification device employing multilayered phoswich technology","authors":"Ville P. Bogdanoff , Kari A. Peräjärvi","doi":"10.1016/j.nima.2025.170437","DOIUrl":"10.1016/j.nima.2025.170437","url":null,"abstract":"<div><div>Handheld radionuclide identification devices (RIDs) are widely used by personnel in homeland security organizations, regulatory authorities, the nuclear energy industry, environmental monitoring, etc., to detect and identify gamma-ray-emitting radionuclides. Many RIDs also include a neutron detector. However, most operationally used RIDs do not provide directional information on gamma-rays and lack the capability of detecting alpha and beta radiation thereby requiring the user to carry multiple devices. Here, we introduce and demonstrate a multipurpose RID that enables rapid interactive directional sensing of a gamma-ray source, can directly and indirectly detect neutrons, and measure alpha and beta radiation from contaminated surfaces. The developed multipurpose detector enables establishing initial situational awareness with a single instrument. This facilitates the work of frontline officers significantly. The sensor fusion required for instrument compactness and multipurposity was achieved by employing phoswich technology and integrated digital electronics. The performance of the prototype device developed is demonstrated in practice using well-known radioactive reference sources. The device has a higher energy range for gamma-rays (from ∼50 keV to above 4.4 MeV) than typical RIDs, enabling indirect detection and characterization of neutron sources. Despite the high level of integration, determined gamma-ray energy resolution and detection sensitivity for gamma-rays, alpha and beta radiation, are comparable to commercially available RIDs and surface contamination monitors. The developed technology can also be applied to other categories of radiation detection instruments.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1075 ","pages":"Article 170437"},"PeriodicalIF":1.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684649","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}

引用次数: 0