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Adsorption behavior of Co_(2) in magnesite micro-pores at high temperature and pressure

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Geoscience Frontiers 2021年第2期12卷 991-999页

作者： Longxing yang Lei liu Hong liu li Yi Xiaoyu Gu haibo liu Hanyu Wang United Laboratory of high-pressure physics and Earthquake Science Key Laboratory of Earthquake PredictionInstitute of Earthquake ForecastingCEABeijing100036China

The fluid inclusions in mantle rocks and melt indicated that a large amount of Co_(2)fluid exists in the deep earth,which is of great significance for understanding the deep carbon cycle and the composition of ***,it was also suggested that carbonate minerals were likely to be the main host of mantle *** the same time,the distribution and behavior of carbon in the mantle still remain a *** this paper,the adsorption behavior and occurrence characteristics of supercritical Co_(2)in magnesite(MgCo3)pores were studied by the Grand Canonical Monte Carlo method(GCMC)under the different conditions of Co_(2)pressures(0–100 Mpa),temperatures(350–1500 K)and the pore sizes(7.5–30Å).The simulated results showed that the adsorption of Co_(2)in magnesite was a physical adsorption,which was mainly controlled by the intermolecular *** gas adsorption became more stable when the adsorption site shifted from the high energy site to the low energy site with increasing pressure(p)and decreasing temperature(T)and pore *** the same time,the variations of excess adsorption amounts of Co_(2)in the pores of magnesite(Nexcess)under the different conditions were quantitatively *** was found that the Nexcess decreased with increasing T,but increased with increasing p and pore *** results favor understanding the Co_(2)migration,seismic precursor observations,and heat transfer process in the deep earth.

关键词： Co_(2) Magnesite Adsorption Nexcess GCMC Carbon cycle

Einstein probe discovery of Ep240408a:A peculiar X-ray transient with an intermediate timescale

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Science china(physics,Mechanics & Astronomy) 2024年

作者： Wenda Zhang Weimin Yuan Zhixing ling Yong Chen Nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati lixin Dai Jingwei Hu Shumei Jia Chichuan Jin Dongyue li paul o’Brien Rongfeng Shen Xinwen Shu Shengli Sun Xiaojin Sun Xiaofeng Wang Lei yang Bing Zhang Chen Zhang Shuang-Nan Zhang Yonghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan p. U. Fynbo Lluis Galbany Saurabh W. Jha Shuaiqing Jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong li Bifang liu Mingjun liu Xing liu Yuan liu Zhu liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria lian Tao Junfeng Wang Song Wang Tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu Dong Xu Yanjun Xu Suijian Xue Yongquan Xue Zijian Zhang Zipei Zhu Hu Zou Congying Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen Yehai Chen Yifan Chen Chenzhou Cui Weiwei Cui Yanfeng Dai Dongwei Fan Ju Guan Dawei Han Dongjie Hou haibo Hu Maohai Huang Jia Huo Zhenqing Jia Bowen Jiang Ge Jin Chengkui li Junfei li Longhui li Maoshun li Wei li Zhengda li Tianying lian Congzhan liu Heyang liu Huaqiu liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu pan Xin pan liming Song Hui Sun Yunyin Tan Qingjun Tang Yihan Tao Hao Wang Juan Wang Lei Wang Wenxin Wang Yilong Wang Yusa Wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu Yunfei Xu Zhao Xu Changbin Xue Yulong Xue Ailiang Yan Haonan yang Xiongtao yang Yanji yang Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang Donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hongyan Zhou Yilin Zhou Yuxuan Zhu Zhencai Zhu Institut d’Estudis Espacials de Catalunya (IEEC) Max planck institute for Extraterrestrial physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of physics University of Hong Kong School of physics and Astronomy University of Leicester School of physics and Astronomy Sun Yat-sen University National Astronomical observatories Department of physics Anhui Normal University Shanghai institute of Technical physics Chinese Academy of Sciences physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of physics and Astronomy University of Nevada Las Vegas Chinese Academy of Sciences South African Astronomical observatory Department of Astronomy University of Cape Town Department of physics University of the Free State Universite' paris Cite' CNRS Astroparticule et Cosmologie Universite' paris Cite' CEA paris-Saclay School of Astronomy and Space Sciences IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr institute University of Copenhagen Department of physics and Astronomy Rutgers the State University of New Jersey institute for Cosmic Ray Research University of Chinese Academy of Sciences The University of Tokyo ESA/ESTEC Noordwijk 2201 AZ The Netherlands Department of Astronomy School of physics Huazhong University of Science and Technology INAF-osservatorio Astrofisico di Torino Sydney institute for Astronomy School of physics Key Laboratory of particle Astrophysics The University of Sydney Department of Astronomy Xiamen University institute for Frontiers in Astronomy and Astrophysics beijing Normal University Department of Astronomy University of Science and Technology Hefei School of Astronomy and Space Sciences University of Science and Technology of china institute of high energy physics institute of Deep Space Sciences Deep Space Exploration Laboratory Department of Astronomy School of physics and Astronomy Yunnan University Shanghai Astronomical observatory Chinese Academy of Science

We report the discovery of a peculiar X-ray transient,Ep240408a,by Einstein probe （Ep） and follow-up studies made with Ep,Swift,NICER,GRoND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board Ep on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 keV,300 times brighter than the underlying X-ray emission detected throughout the *** and more precise follow-up observations by Ep/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 keV,with a power-law photon index varying *** X-ray light curve shows a plateau lasting for4d,followed by a steep decay till becoming undetectable10 d after the initial *** on its temporal property and constraints from previous Ep observations,an unusual timescale in the range of 7-23 d is found for Ep240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of Ep240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of Ep240408a thus remains an *** suggest that Ep240408a may represent a new type of transients with intermediate timescales of the order of10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词：

CEpC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai yang Bai Vipul Bairathi Csaba Balazs philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond p.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma onyedi Eylul University Bandirma Beihang University Beijing beijing Computational Science Research Center Beijing beijing Conveyi LTD Beijing beijing Glass Research institute Co. LtdBeijing beijing institute of Technology Beijing beijing Normal University Beijing Brown University ProvidenceRI Budker institute of Nuclear physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china institute of Atomic energy Beijing china Jiliang University HangzhouZhejiang china Nuclear Instrument Co. LTDBeijing china University of Geosciences Beijing china University of Geosciences WuhanHubei china University of Mining and Technology XuzhouJiangsu china West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft institute Daresbury Cornell University IthacaNY CppM(AMU/IphU&CNRS/INp) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear problems of Joint institute for Nuclear Research(DLNp JINR) Dubna East china University of Science And Technol

The Circular Electron positron Collider(CEpC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super proton proton Collider(SppC).The CEpC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(Ip),resulting in an integrated luminosity of 13 ab^(-1)for two Ips over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEpC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the preliminary Conceptual Design Report(pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

Constructing CdS/Cd/doped Tio_2 Z-scheme type visible light photocatalyst for H_2 production

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Science china Materials 2018年第6期61卷 851-860页

作者： Zhao Zhao Yanbo Xing haibo li pingyun Feng Zaicheng Sun Key Laboratory of Functional Materials physics and Chemistry of the Ministry of Education Jilin Normal Universit beijing Key Lab for Green Catalysis and Separation Department of Chemistry and Chemical Engineering College of Environmental and Energy Engineering Beijing University of Technolog State Key Laboratory of Electroanalytical Chemistry Engineering Laboratory for Modern Analytical Techniques Changchun Institute of Applied Chemistry Chinese Academy of Science Department of Chemistry University of Californi

Constructing Z-scheme type photocatalyst is an efficient way to improve the charge separation efficiency and enhance the photocatalytic activity. In this report, the Cd：Tio2 nanoparticles are prepared via the sol-gel route and employed as a starting material. When it was reduced by NaBH4 at 300°C,the surface oxygen vacancies were produced and Cd2＋ was reduced into metal Cd0 nanoparticle（denoted as R-Cd：Tio2）.Subsequently, the formed R-Cd：Tio2 was treated with thioureain the hydrothermal reaction. Through the decomposition of thiourea, the oxygen vacancies were refilled by S2- from thiourea to form S：Tio2/Tio2（d-Tio2） and Cd was partially converted into CdS to form CdS/Cd/d-Tio2 composite. The formed CdS/Cd/d-Tio2 composite exhibits improved photocatalytic activity. Under visible light irradiation（λ〉400 nm）,the H2 production rate of CdS/Cd/d-Tio2 reaches 119 μmol h-1 with 50 mg of photocatalyst without any cocatalyst, which is about 200 and 60 times higher than that of S：Tio2/Tio2（0.57 μmol h-1）, CdS（2.03 μmol h-1） and heterojunction CdS/d-Tio2（2.17 μmol h-1） materials, respectively. The results illustrate that metal Cd greatly promotes the charge separation efficiency due to the formation of Z-scheme type composite. In addition, the photocatalytic activity in the visible light region was dramatically enhanced due to the contribution of both CdS and d-Tio2. The method could be easily extended to other wide bandgap semiconductors for constructing visible light responsive Z-scheme type photocatalysts.

关键词： Z-scheme CdS doped Tio2 Cd H2 production

Search for Majoron at the CoMET experiment

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Chinese physics C 2023年第1期47卷 93-100页

作者：邢天宇吴琛妙晗李海波李卫国袁野张瑶 institute of high energy physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Research Center for Nuclear physics Osaka UniversityIbarakiOsaka 567-0047Japan

A new Goldstone particle named Majoron is introduced in order to explain the origin of neutrino mass via some new physics models assuming that neutrinos are Majorana *** expanding the signal region and using likelihood analysis,it becomes possible to search for Majoron using experiments originally designed to search forμ-e *** the CoMET experiment,the sensitivity of processμ→eJ is able to reach B(μ→eJ)=2.3×10-5in phase-I and o(10-8)in ***,the sensitivities to search for Majoron in future experiments are also discussed in this article.

关键词： Majoron neutrino CoMET new physics