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Chinese Physics C 2024年第8期48卷 104-112页

作者： Zhi-Guo He Xiao-Bo Jin Bernd A.Kniehl rong Li Department of Physics and Electronics School of Mathematics and PhysicsBeijing University of Chemical TechnologyBeijing 100029China II.institut für theoretische physik Universität HamburgLuruper Chaussee 14922761 HamburgGermany institut für theoretische physik Universität Regensburg93040 RegensburgGermany Center of Advanced Quantum Studies Department of PhysicsBeijing Normal UniversityBeijing 100875China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China institute of theoretical Physics Xi’an Jiaotong UniversityXi’an 710049China

Within the framework of nonrelativistic-QCD factorization,we calculate both the next-to-leading-order relativistic and QCD corrections to prompt J/ψpair production,with feed-down fromψ(2S)mesons,via photon-photon collisions at future e^(+)e^(−)colliders,including the future Circular Lepton Collider(fCC-ee),the Circular Electron Positron Collider(CEPC),and the Compact Linear Collider(CLIC).We present total cross sections and distributions in single J/ψtransverse momentum and rapidity,as well as in J/ψpair invariant *** relativistic and QCD corrections both turn out to be large and ***,the production rates are large enough for useful experimental studies.

关键词： heavy quarkonium perturbative calculation two-photon collisions

formation of Superheavy Nuclei in Massive fusion reactions

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原子核物理评论 2009年第S1期26卷 168-174页

作者： Scheid Werner institut fr theoretische physik der universitt

Within the concept of the dinuclear system(DNS),by incorporating the coupling of the relative motion to the nucleon transfer process,a dynamical model is proposed for describing the formation of superheavy residue nucleus in massive fusion reactions,in which the capture of two heavy colliding nuclei,the formation of compound nucleus and the de-excitation process are calculated using empirical coupled channel model,solving master equation numerically and statistical theory,respectively. By using the DNS model,the evaporation-residue excitation functions in the 48Ca induced fusion reactions and in the cold fusion reactions are investigated systematically and compared with available experimental data. Optimal evaporation channels and combinations as well as the corresponding excitation energies are proposed. the possible factors that influencing the isotopic dependence of the production cross sections are analyzed. the formation of the superheavy nuclei based on the isotopes U with different projectiles are also investigated.

关键词： DNS model massive fusion reaction evaporation-residue excitation function

Photoluminescent Properties of ZnO films Deposited on Si Substrates

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Chinese Physics Letters 2001年第3期18卷 441-442页

作者： ZHANG Guo-Bin SHI Chao-Shu HAN Zheng-fu SHI Jun-Yan fU Zhu-Xi M.Kirm G.Zimmerer National Synchrotron radiation Laboratory University of Science and Technology of ChinaHefei 230026 Department of Physics University of Science and Technology of ChinaHefei 230026 ⅱinstitut für experimental physik der universität hamburg Germany

the photoluminescence of ZnO films deposited on Si substrates by reactive dc sputtering has been studied by using a synchrotron radiation(Sr)light *** excitation spectra show a strong excitation band around 195 nm related to 390 nm emission *** Sr vacuum ultraviolet excitation,a new emission band peaked at 290 nm was found for the first time,besides the ultraviolet emission band(390 nm)and green band(520 nm).

关键词： excitation ultraviolet vacuum

Production mechanism of superheavy nuclei in massive fusion reactions

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Chinese Physics C 2009年第S1期33卷 86-88页

作者：冯兆庆靳根明李君清 Werner Scheid institute of Modern Physics Chinese Academy of Sciences institut für theoretische physik der universitt

Within the concept of the dinuclear system (DNS), a dynamical model is proposed for describing the formation of superheavy nuclei in complete fusion reactions by incorporating the coupling of the relative motion to the nucleon transfer process. the capture of two heavy colliding nuclei, the formation of the compound nucleus and the de-excitation process are calculated by using an empirical coupled channel model, solving a set of microscopically derived master equations numerically and applying statistical theory, respectively. fusion-fission reactions and evaporation residue excitation functions of synthesizing superheavy nuclei (SHN) are investigated systematically and compared them with available experimental data. the possible factors that affecting the production cross sections of SHN are discussed in this workshop.

关键词： DNS model master equations production cross sections

Energy transfer in Cubic Pbf_(2):Gd Crystals

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Chinese Physics Letters 2001年第6期18卷 829-830页

作者： ZHANG Guo-Bin SHI Jun-Yan ZHANG Zeng-Ming HAN Zheng-fu SHI Chao-Shu ZHANG Xin-Yi G.Zimmerer M.Kirm SHEN Ding-Zhong National Synchrotron radiation Laboratory University of Science and Technology of ChinaHefei 230026 Department of Astronomy and Applied Physics University of Science and Technology of ChinaHefei 230026 II institut für experimental physik der universität hamburg 22607 HamburgGermany Shanghai institute of Ceramic Chinese Academy of SciencesShanghai 200050

the emission and excitation spectra of cubic Pbf_(2):Gd were *** with pure crystals,the emissions from Gd^(3+) were observed upon cation exciton excitation in lattices,while the emission from intrinsic self-trapped ex... 详细信息

关键词： excitation cubic pure

temperature Dependence of the Luminescence Decay time of a PbWO_(4) Scintillator

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Chinese Physics Letters 1998年第6期15卷 455-456页

作者： SHI Chao-shu DENG Jie HAN Zheng-fu XIE Zhi-jian LIAO Jing-ying G.Zimmerer J.Beker M.Kamada M.runne A.Schröder Department of Physics University of Science and Technology of ChinaHefei 230026 NSrL University of Science and Technology of ChinaHefei 230026 Shanghai institute of Ceramics Chinese Academy of SciencesShanghai 200050 II.institut für experimental physik der universität hamburg Germany UVSOr Institute of Molecular ScienceJapan

experimental results are given for the temperature dependence of the decay time of the emission at 430nm from PbWO_(4) crystal under vacuum-ultraviolet(82nm)photon excitation in the temperature range of *** structures in the curve are interpreted for the first time by studying the thermoluminescence of PbWO_(4),which originates from the traps in the crystal.

关键词： crystal ultraviolet excitation

Λb^0-baryon production in pp collisions in the general-mass variable-flavour-number scheme,and comparison with CMS and LHCb data

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Chinese Physics C 2018年第8期42卷 34-44页

作者： G.Kramer H.Spiesberger II.institut für theoretische physik Universitat HamburgLuruper Chaussee 149D-22761 HamburgGermany institut für physik Johannes-Gutenberg-UniversitatStaudinger Weg 7D-55099 MainzGermany Centre for theoretical and Mathematical Physics and Department of Physics University of Cape TownRondebosch 7700South Africa

We calculate the next-to-leading-order cross section for the inclusive production ofΛ（b ）baryons in pp collisions in the general-mass variable-flavor-number *** use realistic evolved non-perturbative fragmentation functions obtained from fits to B-meson production in e^＋e^-annihilation and compare our results for transversemomentum and rapidity distributions with recent experimental data from the CMS and the LHCb collaborations at the CErN *** find satisfactory agreement in general,with some indication for the need to modify the available fragmentation functions at larger values of the scale variable.

关键词： heavy flavor production perturbative QCD Ab production

A new quantum speed-meter interferometer: measuring speed to search for intermediate mass black holes

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Light(Science & Applications) 2018年第1期7卷 940-948页

作者： Stefan L.Danilishin Eugene Knyazev Nikita V.Voronchev farid Ya.Khalili Christian Gräf Sebastian Steinlechner Jan-Simon Hennig Stefan Hild institut für theoretische physik Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik(Albert-Einstein-Institut)Callinstraße 38D-30167 HannoverGermany SUPA School of Physics and AstronomyUniversity of GlasgowGlasgow G128QQUnited Kingdom M.V.Lomonosov Moscow State university Faculty of PhysicsMoscow 119991Russia institut für Laserphysik und Zentrum für Optische Quantentechnologien der universität hamburg Luruper Chaussee 14922761 HamburgGermany

the recent discovery of gravitational waves(GW)by Advanced LIGO(Laser Interferometric Gravitational-wave Observatory)has impressively launched the novel field of gravitational astronomy and allowed us to glimpse exciting objects about which we could previously only *** sensitivity improvements at the low-frequency end of the detection band of future GW observatories must rely on quantum non-demolition(QND)methods to suppress fundamental quantum fluctuations of the light fields used to readout the GW *** we present a novel concept of how to turn a conventional Michelson interferometer into a QND speed-meter interferometer with coherently suppressed quantum back-action *** use two orthogonal polarizations of light and an optical circulator to couple *** carry out a detailed analysis of how imperfections and optical loss influence the achievable *** find that the proposed configuration significantly enhances the low-frequency sensitivity and increases the observable event rate of binary black-hole coalescences in the range of 102103Mby a factor of up to~300.

关键词： quantum allowed coherent

relativistic Brueckner-Hartree-fock theory for finite Nuclei

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Chinese Physics Letters 2016年第10期33卷 40-44页

作者：申时行胡金牛梁豪兆孟杰 Peter ring 张双全 State Key Laboratory of Nuclear Physics and technology School of PhysicsPeking University rIKEN Nishina Center Department of Physics Nankai University Department of Physics Graduate School of ScienceThe University of Tokyo School of Physics and Nuclear Energy Engineering Beihang University Department of Physics University of Stellenbosch physik-Department der technischen universitt München

Starting with a bare nucleon-nucleon interaction, for the first time the full relativistic Brueckner Hartree-fock equations are solved for finite nuclei in a Dirac-Woods-Saxon basis. No free parameters are introduced to calculate the ground-state properties of finite nuclei. the nucleus 160 is investigated as an example. the resulting groundstate properties, such as binding energy and charge radius, are considerably improved as compared with the non-relativistic Brueckner-Hartree-fock results and much closer to the experimental data. this opens the door for ab initio covariant investigations of heavy nuclei.

关键词： in with for of relativistic Brueckner-Hartree-fock theory for finite Nuclei rHf been body is

On the helium bubble swelling in nano-oxide dispersion-strengthened steels

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Journal of Materials Science & technology 2022年第10期105卷 172-181页

作者： Vladimir Krsjak tielong Shen Jarmila Degmova Stanislav Sojak Erik Korpas Pavol Noga Werner Egger Bingsheng Li Vladimir Slugen frank A.Garner Slovak university of technology Faculty of Electrical Engineering and Information TechnologyInstitute of Nuclear and Physical EngineeringIlkovicova 3Bratislava 81219Slovakia Chinese Academy of Sciences Institute of Modern PhysicsLanzhou 730000China Slovak university of technology Faculty of Materials Science and TechnologyAdvanced Technologies Research InstituteJana Bottu 2781/25Trnava 91724Slovakia universität der Bundeswehr München Institut für Angewandte Physik und Messtechnik LRT2Werner-Heisenberg-Weg 39Neubiberg85577Germany Southwest university of Science and technology State Key Laboratory for Environment-friendly Energy MaterialsMianyangSichuan 621010China texas A&M university Nuclear Engineering DepartmentCollege StationTX 77843USA radiation Effects Consulting LLC Richland WA 99354USA

the development of structural materials resistant to harsh radiation environments requires an in-depth understanding of the early stage of the aging *** radiation environments with high transmutation helium production rates such as in fusion and spallation applications,even materials with otherwise acceptable radiation stability may suffer from radiation embrittlement related to helium bubble *** theoretical modeling of helium-assisted cavity nucleation in pure metals and simple alloys provides some useful guidelines at the atomic scale level,these,however,do not overlap with the size resolution of available experimental *** this study,we employed slow positron beam spectroscopy to characterize the nucleation and growth of nano-scale helium bubbles in martensitic steels strengthened by thermodynamically stable nano-oxide *** combination with transmission electron microscopy,we experimentally characterized the evolution of helium bubbles from small clusters of radiation-induced vacancies to large cavities well resolvable by *** radiation resistance of oxide-dispersion strengthened steels dominates only in the early stages of bubble evolution,where positron lifetime measurements provide a missing piece of the microstructural puzzle conventionally constructed by tEM.

关键词： Ion irradiation Bubble swelling Helium Positron annihilation spectroscopy Oxide dispersion strengthened steels