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

{"title":"On the suitability of modernization and application of electrographic oscillographs for the continuous analog recording of seismic signals with their electronic scanning and periodic or triggered issuing of visible seismograms on ordinary paper","authors":"S.A. Mkhitaryan ,&nbsp;A.H. Mkrtchyan ,&nbsp;V. Baiocchi ,&nbsp;H.F. Khachatryan ,&nbsp;M.A. Hovhannisyan ,&nbsp;А.R. Mnatsakanyan ,&nbsp;A.P. Antonyan ,&nbsp;K.S. Mkhitaryan ,&nbsp;A.M. Minasyan ,&nbsp;H.R. Drmeyan","doi":"10.1016/j.nima.2025.170255","DOIUrl":"10.1016/j.nima.2025.170255","url":null,"abstract":"<div><div>Depending on the characteristics of signals to be recorded and tasks to be solved, many specific technical and operational requirements are imposed on recording devices, which are best met by modern digital recording devices. However, despite the wide usage of modern digital recorders, many seismic stations in parallel with digital recorders still also use visible analog recorders for simultaneous analog visible continues or standby recording to obtain express visible records, provide operative manual express analysis of seismograms, and so on.</div><div>Among various types of analog continuous visible recorders, light-beam photo galvanometric recording devices were one of the most widely used in seismology for continuous helical recording of seismic signals. However, the high cost and scarcity of photo media, their chemical processing, additional errors in seismograms due to the shrinkage of photo papers after chemical processing, inability to obtain express visible information, absence of intermediate memory, and other disadvantages create several inconveniences in their operation in current seismic stations.</div><div>On the other hand, pen drum helicorders or direct recorders were most convenient for directly visible recording and its observation, obtaining and analysis of express visible information, etc. However, they have limited frequency and dynamic ranges, record mainly with friction in curvilinear coordinates, etc.</div><div>Created and suggested electrophotographic (EPG) light-beam oscillographs with intermediate electrostatic memory and continuous electrostatic hidden recording of analog signals on EPG media with their helical or stepped electronic scanning, and automatic periodic or triggered issuing of visible records - seismograms on a simple paper, combine all the advantages of light-beam oscillographs and pen recorders, are free from their specific disadvantages and can be used in seismic stations in parallel with digital recorders for the simultaneous continuous or standby analog visible recording and analyses of seismic signals.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170255"},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128870","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":"SFγNCS, a multi-detector to characterize γ-ray cascades from nuclear reactions","authors":"O. Roig ,&nbsp;M. Pottier ,&nbsp;V. Méot ,&nbsp;L. Gaudefroy ,&nbsp;C. Fougères ,&nbsp;A. Ebran","doi":"10.1016/j.nima.2025.170243","DOIUrl":"10.1016/j.nima.2025.170243","url":null,"abstract":"<div><div>A multi-detector SF<span><math><mi>γ</mi></math></span>NCS (<span><math><mi>γ</mi></math></span> Strength Function for Neutron capture Cross Sections) for light charged particle transfer reaction was built at CEA,DAM,DIF to carry out experiments studying the radiative deexcitation of nuclei. This new setup is composed of an array of 60 NaI(Tl) large volume detectors around a reaction chamber containing double-sided segmented silicon detectors organized in <span><math><mrow><mi>Δ</mi><mi>E</mi></mrow></math></span>-<span><math><mi>E</mi></math></span> telescope. Through a precise angle and energy determination of the light charged ejectile, the [<span><math><msubsup><mrow><mi>E</mi></mrow><mrow><mi>γ</mi></mrow><mrow><mi>d</mi><mi>e</mi><mi>t</mi><mi>e</mi><mi>c</mi><mi>t</mi><mi>e</mi><mi>d</mi></mrow></msubsup></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>e</mi><mi>x</mi><mi>c</mi><mi>i</mi><mi>t</mi><mi>a</mi><mi>t</mi><mi>i</mi><mi>o</mi><mi>n</mi></mrow></msub></math></span>] matrix is obtained. With high segmentation for <span><math><mi>γ</mi></math></span>-rays and particles detection and 59% of 4<span><math><mi>π</mi></math></span> solid angle for the <span><math><mi>γ</mi></math></span>-ray array, a high particle-<span><math><mi>γ</mi></math></span>-ray coincidence efficiency is found. An accurate GEANT4 simulation of the whole setup is achieved to reproduce at best the <span><math><mi>γ</mi></math></span>-rays detection response. This system is dedicated to extract nuclear properties like two ingredients of nuclear reaction models: <span><math><mi>γ</mi></math></span>-strength function and nuclear level density which are crucial to reliably compute radiative capture cross-sections on nuclei for astrophysics studies or nuclear energy applications. As a reference for this setup, we report on an application of the so-called ”Oslo method” to the transfer reaction, ²³⁸U(<span><math><mrow><mi>d</mi><mo>,</mo><mi>p</mi></mrow></math></span>)²³⁹U, to show the performance of our setup to bring precise nuclear properties in the quasi-continuum.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170243"},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128661","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":"Quantum aspects of harmonic radiation in non-linear Compton backscattering","authors":"A. Curcio ,&nbsp;G. Dattoli ,&nbsp;E. Di Palma ,&nbsp;D. Giulietti","doi":"10.1016/j.nima.2025.170247","DOIUrl":"10.1016/j.nima.2025.170247","url":null,"abstract":"<div><div>Harmonic emission occurs in non-linear Compton BackScattering (CBS) sources, where the electrons wiggle at relativistic velocity. Here we report analytical expressions for the spectral-angular distributions of CBS harmonic radiation emitted in the quantum-recoil regime. Such expressions have been derived by means of practical approximations of Generalized Bessel functions. Relevant measurable aspects are finally discussed, which may guide experimental investigations.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170247"},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128871","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 and quality control of PMT modules for the large-sized telescopes of the Cherenkov Telescope Array Observatory","authors":"T. Saito ,&nbsp;M. Takahashi ,&nbsp;Y. Inome ,&nbsp;H. Abe ,&nbsp;M. Artero ,&nbsp;O. Blanch ,&nbsp;J. Becerra González ,&nbsp;S. Fukami ,&nbsp;D. Hadasch ,&nbsp;Y. Hanabata ,&nbsp;Y. Hattori ,&nbsp;J. Herrera Llorente ,&nbsp;K. Ishio ,&nbsp;H. Iwasaki ,&nbsp;H. Katagiri ,&nbsp;K. Kawamura ,&nbsp;D. Kerszberg ,&nbsp;S. Kimura ,&nbsp;T. Kiyomoto ,&nbsp;T. Kojima ,&nbsp;T. Yoshida","doi":"10.1016/j.nima.2025.170229","DOIUrl":"10.1016/j.nima.2025.170229","url":null,"abstract":"<div><div>The camera of the Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array Observatory (CTAO) consists of 1855 pixels that are grouped into 265 high-performance photomultiplier tube (PMT) modules. Each module comprises a seven-light-guide plate, seven PMT units, a slow control board, and a readout board with a trigger board. The requirements for the PMT modules include various aspects, such as photon detection efficiency, dynamic range, buffer depth, and test pulse functionality.</div><div>We have developed a high-performance PMT module that fulfills all these requirements. Mass-production and quality control (QC) of modules for all four LSTs of the northern CTAO have been completed. Here we report on the technical details of each element of the module and its performance, together with the methods and results of QC measurements.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170229"},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128662","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":"The energy dependence of cluster size and its physical processes in the proton measurement with TimePix3 silicon detector","authors":"Naoki Itoh ,&nbsp;Hugo Allaire ,&nbsp;Tokihiro Ikeda ,&nbsp;Shunsaku Nagasawa ,&nbsp;Shinji Okada ,&nbsp;Tadayuki Takahashi ,&nbsp;Aiko Takamine ,&nbsp;Yuichi Toyama ,&nbsp;Yuusuke Uchida ,&nbsp;Hideki Ueno","doi":"10.1016/j.nima.2025.170244","DOIUrl":"10.1016/j.nima.2025.170244","url":null,"abstract":"<div><div>We investigated the energy dependence of the number of triggered pixels, or cluster size, when charged particles are detected using the TimePix3 detector with a silicon sensor. We measured protons in the range of 1.5–3.3 <span><math><mi>MeV</mi></math></span> from a Pelletron accelerator at RIKEN using a TimePix3 detector with a 500 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>-thick silicon sensor. We determined from the experimental results a cluster size comprised between 30 and 80 pixels. To understand the physical process that produces large cluster images and its energy dependence, we simulated the charge carrier drifts in the sensor, assuming the incidence of a proton in the detector. The cluster sizes estimated in the simulation were smaller than those observed in the experiment, and remained constant across the entire energy range, when thermal diffusion and charge carriers self-repulsion were considered as the factors of the cluster image formation. In addition, we discovered that the size of the cluster image and its energy dependence observed in the experiment could be well explained when considering that the TimePix3 detector is sensitive to the transient induced charges, allowing even pixels that do not collect the charge carriers to trigger. We conclude that the cluster size measurement is a promising method for evaluating the energy deposited by a charged particle in the TimePix3 detector.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170244"},"PeriodicalIF":1.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143128663","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":"A prototype of in-air undulator vacuum chamber coated with non-evaporable getter films","authors":"Pengcheng Wang ,&nbsp;Sihui Wang ,&nbsp;Bangle Zhu ,&nbsp;Jiaming Liu ,&nbsp;Lei Zhang ,&nbsp;Yigang Wang ,&nbsp;Shunming Liu ,&nbsp;Xiaoyang Sun ,&nbsp;Biao Tan ,&nbsp;Tao Huang ,&nbsp;Haiyi Dong ,&nbsp;Yong Wang","doi":"10.1016/j.nima.2025.170263","DOIUrl":"10.1016/j.nima.2025.170263","url":null,"abstract":"<div><div>The inner wall of the in-air undulator (IAU) vacuum chamber at the High Energy Photon Source (HEPS) is planned to be coated with a non-evaporable getter (NEG) film. After activation, the specified vacuum environment can be achieved inside the storage ring beam pipe, meeting the requirements for beam lifetime. The current challenge for depositing the IAU vacuum chamber is to maintain cathode alignment and ensuring stable plasma discharge across the entire area during the magnetron sputtering coating process. This research concentrates on the particle-in-cell/monte carlo collision (PIC/MCC) method to model and simulate the magnetron sputtering discharge process. Through analysis of plasma discharge states at various positions within the IAU vacuum chamber, a stable discharge region inside the solenoid was identified. Furthermore, a specialized segmented coating method was proposed to counteract the influence of the solenoid magnetic field's edge effects on discharge stability, facilitating the uniform deposition of the NEG film across the entire axial extent of the vacuum chamber. After activation of the NEG film for the IAU vacuum chamber (180 °C for 48 h), the ultimate vacuum level is capable of reaching 3.7 × 10⁻⁸ Pa. This coating method has been proved to be feasible and ensures the stability of the discharge and the reliability of the NEG film quality, which satisfy the stringent engineering requirements of HEPS. This study may also offer a reference for similar vacuum chamber coating applications.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170263"},"PeriodicalIF":1.5,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129179","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":"4π directional radiation detector based on Compton scattering with channel reduction method","authors":"Max Ghelman ,&nbsp;Natan Kopeika ,&nbsp;Stanley Rotman ,&nbsp;Zohar Davidov ,&nbsp;Alon Osovizky","doi":"10.1016/j.nima.2025.170246","DOIUrl":"10.1016/j.nima.2025.170246","url":null,"abstract":"<div><div>Accurate detection of radiation sources across 4π is essential for various applications, such as nuclear homeland security, radiological contamination mapping, and space exploration. Traditional directional radiation detectors often rely on bulky high-Z materials for directional shielding, introducing limitations in size, weight and field of view. These factors make them unsuitable for handheld devices, drone mapping, and space applications. Additionally, their restricted field of view requires either multiple detectors or rotational mechanisms to cover the entire field of view. To address these limitations, we present a novel 4π directional radiation detector based on Compton scattering with a segmented hollow cubic structure. This detector utilizes GAGG(Ce) scintillators coupled with silicon photomultipliers, eliminating the need for predefined separate scatterer and absorber detectors. We used GAMOS to simulate and optimize the cubic detector, to achieve a high absolute detection efficiency of 7% and full 4π detection capability. Our innovative channel reduction method is based on 488 sub-detectors that are read out through only 98 channels, with insignificant reduction in readout performance. The influence of a channel readout performance was measured and incorporated into the simulation. This channel reduction approach significantly reduces cost and power consumption while improving angular resolution for distinguishing closely located sources. We evaluate by simulation the detector's performance in distinguishing and localizing two radiation sources (1 mCi and 2 mCi) spaced 4 m apart from a distance of 10 m, as specified by the new N42.62-2023 standard for radiation imaging. Moreover, by implementing the Levenberg-Marquardt Algorithm for estimating two-dimensional Cauchy-based distributions, we achieve a more accurate localization and relative radioactivity assessment of the sources.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1072 ","pages":"Article 170246"},"PeriodicalIF":1.5,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103746","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":"Comment on “A novel dual high-energy X-ray imaging method for materials discrimination” [Nucl. Instrum. Methods Phys. Res. A 930 (2019) 82–86]","authors":"Hans Rabus","doi":"10.1016/j.nima.2025.170261","DOIUrl":"10.1016/j.nima.2025.170261","url":null,"abstract":"","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170261"},"PeriodicalIF":1.5,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129268","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":"Design and development of a high sensitivity radon detector based on air scintillation","authors":"Kangfu Zhu ,&nbsp;Yanbo Xue ,&nbsp;Yuhang Wang ,&nbsp;Xiong Yang ,&nbsp;Qingmin Zhang ,&nbsp;Haiyu Kong ,&nbsp;Zuoming Zhu ,&nbsp;Ziqi Cai ,&nbsp;Shiyu Liu ,&nbsp;Haoxuan Guo ,&nbsp;Yaodong Sang ,&nbsp;Hulin Zhong ,&nbsp;Jinkai Liu ,&nbsp;Liangpeng Wu ,&nbsp;Eryuan Qu","doi":"10.1016/j.nima.2025.170253","DOIUrl":"10.1016/j.nima.2025.170253","url":null,"abstract":"<div><div>Radon exposure increases the risk of lung cancer due to its radioactivity after being inhaled. Developing a highly sensitive radon detector with a low limit of detection (LLD) is urgently required to enable online monitoring and meet the need for accurate, rapid early warning at low radon concentrations (a low radiation flux). Previous experiments demonstrated that radon measurement based on air scintillation is feasible using two PMTs and the 2-fold coincidence. However, the design focused on maximizing detection efficiency for alpha particles, resulting in a low sensitivity (0.01 cpm/(Bq/m³)) and a high LLD (137.14 Bq/m³). For rapid early warning at low radon concentrations, reducing the detector's LLD is essential, which necessitates minimizing noise and enhancing sensitivity. The detector was initially designed with M/N (a majority coincidence of M fired PMTs out of N PMTs) majority coincidence logic to address the low light yield of air (about 20 ph/MeV). Simulation was then used to optimize its parameters and operational settings. Subsequently, the new detector was constructed, and its electronic circuit incorporating M/N coincidence logic was developed. Tests of the new detector revealed an experimental LLD of 8.65 Bq/m³ using 3/4 coincidence logic, a threshold of 45 mV, and a 30-min measurement period. The corresponding sensitivity reached 0.32 cpm/(Bq/m³). This technique offers a novel approach for timely and accurate radon monitoring, particularly at low concentrations, with significant implications for public health protection.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1073 ","pages":"Article 170253"},"PeriodicalIF":1.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428121","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":"Final design of Neutron Imaging System “NERA” at the Maâmora reactor","authors":"Afaf Ouardi,&nbsp;Khalid Laraki,&nbsp;Mohamed Messous","doi":"10.1016/j.nima.2025.170234","DOIUrl":"10.1016/j.nima.2025.170234","url":null,"abstract":"<div><div>A new neutron imaging instrument is slated to be constructed to bolster the field of neutron imaging research at the Maamora Triga Research Reactor, situated within the CNESTEN Research Center in Rabat. The instrument aims to support neutron imaging research and routine quality control across industrial applications such as automotive, aircraft, and mining. This neutron imaging setup will be integrated with the prompt gamma-ray activation instrument, and both systems will be mounted on the tangential channel. The thermal neutron flux at the imaging plane is expected to reach 6 × 10⁵ cm⁻² s⁻¹ at a nominal L/D ratio of 300. Furthermore, the L/D ratio can be adjusted within a range of 100–430 to meet diverse experimental needs and optimize imaging conditions for specific applications.</div><div>The facility is capable of operating with multiple beam sizes ranging from over 80 mm to 240 mm square. These beams are positioned approximately 5.5–6 m downstream of the L/D exchanger pinhole collimator entrance.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1072 ","pages":"Article 170234"},"PeriodicalIF":1.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103739","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}