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Characterization and photoluminescence properties of ultrafine copper molybdate(α-CumoO_4) powders prepared via a combustion-like process

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International Journal of minerals,metallurgy and materials 2016年第11期23卷 1340-1345页

作者： mohamed Benchikhi Rachida El Ouatib Sophie Guillemet-fritsch Lahcen Er-Rakho Bernard Durand Laboratoire de Physico-Chimie des matériaux Inorganiques Faculté des Sciences Ain Chock Université Hassan Ⅱ Casablanca Institut Carnot CIRImAT CNRS Université de Toulouse

We report a simple method for preparing copper（II） molybdate（CumoO_4） powders via a combustion-like process. A gel was first prepared by the polymerizable complex method, where citric acid was used as a complexing and polymerizing agent and nitric acid was used as an oxidizing agent. The thermal decomposition behavior of the（Cumo）-precursor gel was studied by thermogravimetry–differential thermal analysis（TG–DTA）, Fourier transform infrared spectroscopy（FTIR）, and X-ray diffraction（XRD）. We observed that the crystallization of CumoO_4 powder was completed at 450°C. The obtained homogeneous powder was composed of grains with sizes in the range from 150 to 500 nm and exhibited a specific surface area of approximately 5 m^2/g. The average grain size increased with increasing annealing temperature. The as-prepared CumoO_4 crystals showed a strong green photoluminescence emission at room temperature under excitation at 290 nm, which we mainly interpreted on the basis of the Jahn-Teller effect on [moO_4^（2-）] complex anions. We also observed that the photoluminescence intensity increased with increasing crystallite size.

关键词： copper molybdate chemical synthesis photoluminescence Jahn-Teller effect

Precision of Radiation Chemistry Networks: Playing Jenga with Kinetic models for Liquid-Phase Electron microscopy

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Precision Chemistry 2023年第10期1卷 592-601页

作者： Birk fritsch Paolo malgaretti Jens Harting Karl J.J.mayrhofer Andreas Hutzler Helmholtz Institute Erlangen-Nürnberg for Renewable Energy(IEK-11) Forschungszentrum Jülich GmbH91058 ErlangenGermany Department of Chemical and Biological Engineering and Department of Physics Friedrich-Alexander-Universität Erlangen-Nürnberg91058 ErlangenGermany

Liquid-phase transmission electron microscopy(LP-TEm)is a powerful tool to gain unique insights into dynamics at the *** electron probe,however,can induce significant beam effects that often alter observed phenomena such as radiolysis of the aqueous *** magnitude of beam-induced radiolysis can be assessed by means of radiation chemistry simulations potentially enabling quantitative application of ***,the computational cost of these simulations scales with the amount of reactants *** minimize the computational cost,while maintaining accurate predictions,we optimize the parameter space for the solution chemistry of aqueous systems in general and for diluted HAuCl4 solutions in *** results indicate that sparsened kinetic models can accurately describe steady-state formation during LP-TEm and provide a handy prerequisite for efficient multidimensional *** emphasize that the demonstrated workflow can be easily generalized to any kinetic model involving multiple reaction pathways.

关键词： Electron beam effects gold radiolysis kinetic modeling simulation efficiency liquid cell transmission electron microscopy

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西太平洋地区的中尺度对流复合体

气象科技 1992年第6期20卷 38-47页

作者： David miller J.m.fritsch 江吉喜美国宾夕法尼亚州立大学气象系

本文运用日本静止气象卫星的增强显示红外圆盘云图,给出了1983-1985年期间西太平洋地区中尺度对流复合体(mCC)的气候学研究.结果指出,在西太平洋地区mCC是常见的系统,并且表现出许多与美洲mCC相同的特征.这种系统活动在夜间,并且往往形... 详细信息

本文运用日本静止气象卫星的增强显示红外圆盘云图,给出了1983-1985年期间西太平洋地区中尺度对流复合体(mCC)的气候学研究.结果指出,在西太平洋地区mCC是常见的系统,并且表现出许多与美洲mCC相同的特征.这种系统活动在夜间,并且往往形成在陆地上或者紧靠陆地的邻近地区.在美洲,它们的冷云罩(Cold Cloud Shield)持续时间约为10小时,而在西太平洋地区则持续约11小时.冷云罩的大小分布与美洲的相似,大多数面积在2～3×10~5平方公里之间.这种系统在西太平洋地区的季节分布也与美洲的相似.具体地说,它们的最高频率在中纬度地区出现在春末夏初,低纬度地区则均匀地分布在整个暖季中.如同西半球系统一样,西太平洋地区的mCC发生在气候学上具有高θ_e空气的低层急流和高层分流出现的区域.而它们的移动路径如同美洲的系统,典型地移向700-500hPa中气候平均气流的右侧(南半球移向左侧).这种对平均气流的偏离朝着高θ_e空气源区方向.少数移动在水面上的mCC形成了热带风暴;同样,少数移动在陆地上的热带系统形成了mCC.由于西太平洋地区与美洲mCC性质和环境很相似,因此可以推断它们在实质上是同一现象.鉴于它们在美洲和西太平洋地区经常出现,很可能使它们对全球水分循环起重要作用.

关键词：中尺度对流层复合体太平洋

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用于大屏幕投影的液晶相位调制器

光电子技术 1990年第3期10卷 48-52,47页

作者： m.fritsch 陈向真

我们研究的液晶相位调制器,有可能取代在一些大屏幕投影仪上作图象产生器的电变形油膜。液晶使入射光产生与电压有关的相位移,借助纹影光学系统,入射光被转换成幅度调制光。为了取得大的光学效率,液晶盒被设计成不带偏振器而能工作。当... 详细信息

我们研究的液晶相位调制器,有可能取代在一些大屏幕投影仪上作图象产生器的电变形油膜。液晶使入射光产生与电压有关的相位移,借助纹影光学系统,入射光被转换成幅度调制光。为了取得大的光学效率,液晶盒被设计成不带偏振器而能工作。当采用薄膜晶体管阵列或薄型mOS晶体管阵列作驱动器时,有可能做到具有灰度的投影。

关键词：大屏幕投影电视液晶相位调制器

Issues and Opportunities in Exotic Hadrons

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Chinese Physics C 2016年第4期40卷 8-21页

作者： R.A.Briceno T.D.Cohen S.Coito J.J.Dudek E.Eichten C.S.Fischer m.fritsch W.Gradl A.Jackura m.Kornicer G.Krein R.F.Lebed F.A.machado R.E.mitchell C.J.morningstar m.Peardon m.R.Pennington K.Peters J.m.Richard C.P.Shen m.R.Shepherd T.Skwarnicki E.S.Swanson A.P.Szczepaniak C.Z.Yuan Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News VA 23606 USA Department of Physics Old Dominion University Norfolk VA 23529 USA maryland Center for Fundamental Physics University of Maryland College Park MD USA Institute of modern Physics CAS Lanzhou 730000 China Theoretical Physics Department Fermilab IL 60510 USA Institut fut Theoretische Physik Justus-Liebig-Universitat Gieben Heinrich-Buff-Ring 16 D-35392 GieBen Germany Helmholtz Institute mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Physics Department Indiana University Bloomington IN 47405 USA University of Hawaii Honolulu Hawaii 96822 USA Instituto de Física Teorica Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz 271 - Bloco II 01140-070 Sgo Paulo SP Brazil Department of Physics Arizona State University Tempe Arizona 85287-1504 USA Department of Physics and Astronomy University of Pittsburgh Pittsburgh PA 15260 USA Indiana University Bloomington Indiana 47405 USA Department of Physics Carnegie Mellon University Pittsburgh PA 15213 USA School of mathematics Trinity College Dublin 2 Ireland GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Universite de Lyon Institut de Physique Nucleaire de Lyon IN2P3-CNRS-UCBL 4 rue Enrico Fermi Villeurbanne France Beihang University Beijing 100191 China Syracuse University Syracuse NY USA Theory Center Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News VA 23606 USA Center for Exploration of Energy and matter Indiana University Bloomington IN 47403 USA Institute of High Energy Physics Beijing 100049 China

The last few years have been witness to a proliferation of new results concerning heavy exotic ***, many new signals have been discovered that could be pointing towards the existence of tetraquarks,pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.

关键词： quark meson exotic flavor pointing charm Belle sophisticated hadron situations

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关于合成金刚石薄膜的宝石学初步研究

国外非金属矿与宝石 1990年第2期 31-36页

作者： Emmanuel fritsch Laurie Conner 湖南大学

为了解决在鉴别有合成金刚石薄膜的宝石材料和元膜宝石材料时可能遇到的问题,我们检测了一个厚约1μm、与基体分离的多晶金刚石薄膜样品。这种膜用标准显微镜检测方法很容易识别,在面反射光和偏振光下更是如此。对于在检测较厚薄片、单... 详细信息

为了解决在鉴别有合成金刚石薄膜的宝石材料和元膜宝石材料时可能遇到的问题,我们检测了一个厚约1μm、与基体分离的多晶金刚石薄膜样品。这种膜用标准显微镜检测方法很容易识别,在面反射光和偏振光下更是如此。对于在检测较厚薄片、单晶或者彩色合成金刚石薄膜和有刻面的宝石上的覆盖层时可能遇到的问题,本文也作了简要的讨论。（共4页)

关键词：合成金刚石薄膜宝石学

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中纬度中尺度对流复合体中的强降水区移动

气象科技 1987年第4期 34-37页

作者： J.H.merritt J.m.fritsch 牟惟丰

一、引言对于业务预报员来说,最大的挑战之一是暖季降水的预报。现行的有限区细网格模式业务预报由于对流参数化方面的限制而只有有限的成功。令人特别感兴趣的是在近些年已有了一些与中尺度对流系统相联系的强降水实例研究,尤其maddox(... 详细信息

一、引言对于业务预报员来说,最大的挑战之一是暖季降水的预报。现行的有限区细网格模式业务预报由于对流参数化方面的限制而只有有限的成功。令人特别感兴趣的是在近些年已有了一些与中尺度对流系统相联系的强降水实例研究,尤其maddox(1980)对中尺度对流复合体(mCC)的研究。对mCC的天气学环境也曾由maddox(1981,1983),Bosart和Sanders(1981),以及Wetzel等(1983)提出过,这对于预报员判断mCC的影响区有帮助。然而对于预报中尺度系统移动速度和方向的指导规则则尚未恰当地揭露和提出来。由于强对流天气所包含的时间与空间尺度(16小时和10～5平方公里)和高的频率(maddox,1980),这样的指导规则是迫切需要的。

关键词：中尺度对流复合体降水区移速云层低层 mCC 冷云盖对流单体对流云单体天气尺度系统水汽辐合 mBE 对流风暴中纬度

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Physics C 2024年第8期48卷 6-33页

作者： m.Ablikim m.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger m.Berlowski m.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen m.L.Chen S.J.Chen S.L.Chen S.m.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.K.Choi X.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko m.Destefanis F.De mori B.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng K.Fischer m.fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.m.Gersabeck B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong m.Y.Dong X.Dong m.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna m.Greco m.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo m.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.m.Hu J.F.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang Y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der Wiesche m.Irshad J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia D.Jiang H.B.Jiang P.C.Jiang S.S.Jiang T.J.Jiang X.S.Jiang Y.Jiang J.B.Jiao J.K.Jiao Z.Jiao S.Jin Y.Jin m.Q.Jing X.m.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang m.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf m.Kuessner X.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei H.Leithoff m.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.m.Li F.Li G.Li H.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li K.Li L.J.Li L.K.Li Lei Li m.H.Li P.R.Li Q.m.Li Q.X.Li R.Li S.X.Li T.Li W.D.Li W.G.Li X.Li X.H.Li X.L.Li X.Y.Li Y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COmSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner mongolia University Hohhot 010021China Institute of modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKm angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction

Scalable high-repetition-rate sub-half-cycle terahertz pulses from spatially indirect interband transitions

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Light(Science & Applications) 2022年第6期11卷 1304-1311页

作者： Christian meineke michael Prager Johannes Hayes Qiannan Wen Lukas Zheyi Kastner Dieter Schuh Kilian fritsch Oleg Pronin markus Stein Felix Schafer Sangam Chatterjee mackillo Kira Rupert Huber Dominique Bougeard Department of Physics University of Regensburg93040 RegensburgGermany Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMl 48109USA Faculty of Electrical Engineering Helmut Schmidt University22043 HamburgGermany Institute of Experimental Physics I Justus Liebig University Giessen35392 GiessenGermany

Intense phase-locked terahertz(THz)pulses are the bedrock of THz lightwave electronics,where the carrier field creates a transient bias to control electrons on sub-cycle time *** applications such as THz scanning tunnelling microscopy or electronic devices operating at optical clock rates call for ultimately short,almost unipolar waveforms,at megahertz(mHz)repetition ***,we present a flexible and scalable scheme for the generation of strong phase-locked THz pulses based on shift currents in type-ll-aligned epitaxial semiconductor *** measured THz waveforms exhibit only 0.45 optical cycles at their centre frequency within the full width at half maximum of the intensity envelope,peak fields above 1.1 kVcm^(-1) and spectral components up to the mid-infrared,at a repetition rate of 4 *** only positive half-cycle of this waveform exceeds all negative half-cycles by almost four times,which is unexpected from shift currents *** detailed analysis reveals that local charging dynamics induces the pronounced positive THz-emission peak as electrons and holes approach charge neutrality after separation by the optical pump pulse,also enabling ultrabroadband *** unipolar emitters mark a milestone for flexibly scalable,next-generation high-repetition-rate sources of intense and strongly asymmetric electric field transients.

关键词： pump repetition cycle