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Method for studying diatomic rovibrational spectra at a given vibrational state

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Science China(Physics,Mechanics & Astronomy) 2019年第4期62卷 65-70页

作者： Yi Zhang weiguo sun Jia Fu QunChao Fan Jie Ma LianTuan Xiao SuoTang Jia College of Advanced Interdisciplinary Studies National University of Defense Technology School of Science Research Center for Advanced Computation Xihua University Institute of Atomic and Molecular Physics Sichuan University State key Laboratory of Quantum Optics and Quantum Optics Devices Laser Spectroscopy LaboratoryShanxi University

An algebraic method for rotational energies at a given vibrational state(AMr(v)) is proposed in this study in order to obtain unknown high-lying rovibrational energies. Applications of this method to the ground electronic state X^1Σ^+of CO and the excited state C^1Σ^+of^(39)K^7Li molecules show the following:(1) the AMr(v) can give the rational upper limit J of a rotational quantum number of a diatomic electronic state;(2) the full AMr(v) rovibrational energies {E_(υJ)}_υ of given vibrational states not only reproduce all known experimental data excellently but also predict precisely the values of all high-lying rovibrational energies,which may not be available experimentally.

关键词： rovibrational energies diatomic systems algebraic method

Extraordinary self-lubrication properties of non-hydrogenated diamond-like carbon films under humid atmosphere

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Science China(Technological Sciences) 2009年第4期52卷 850-856页

作者： WANG Feng WU WeiDong LI Jun LI ShengYin TANG YongJian sun weiguo Institute of Atomic and Molecular Physics of Sichuan University Chengdu 610065China Centre of Laser Fusion Research of CAEP Mianyang 621900China

Tribological properties of non-hydrogenated diamond-like carbon (DLC) films were investigated under humid (RH=80%) and dry (RH=5%) air. These films were deposited by pulsed laser deposition (PLD) at different substrate temperatures. Tribological properties of DLC fabricated by PLD is not sensitive to the relative humidity of testing environment. Because of the unique growth mechanism of DLC pre- pared by PLD, DLC is of "soft-hard" double layers, having a very low friction coefficient and wear rate under humid atmosphere. The minimum coefficient and wear rate of film under humid circumstance are 0.045 and 5.94×10?10 mm3N-1m-1, respectively, just a little bit more than those under dry condition. The root means square roughness of film is less than 1 nm. The sp3 content of film grown at room tem- perature (RT) is 72%, and the sp3 content decreases with temperature. Raman spectrum shows that the micro-structure is amorphous network. The largest hardness and elastic modulus of film are 51 GPa and 350 GPa, respectively and they reduce with increase of deposition temperature too. Water contact angles on surface are more than 90° which indicates that films fabricated by PLD are hydrophobic with low surface energy.

关键词： pulsed laser deposition (PLD) non-hydrogenated diamond-like carbon (DLC) relative humidity double layer friction coefficient wear rate

Comparison of short period InAs/GaSb superlattices on GaSb and GaAs substrates

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Science China(Technological Sciences) 2009年第1期52卷 23-27页

作者： GUO Jie CHEN HuiJuan sun weiguo HAO RuiTing XU YingQiang NIU ZhiChuan Material School NorthWest Polytechnical UniversityXi’an 610000China Luoyang Optical Electronics Center Luoyang 471009China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China

Type II superlattices (SLs) short period InAs(4ML)/GaSb(8ML) were grown by molecular-beam epitaxy on lattice-mismatched GaAs substrates and on GaSb substrates. A smooth GaSb epilayer was formed on GaAs substrates by inserting mulit-buffer layers including an interfacial misfit mode AlSb quantum dot layer and AlSb/GaSb superlattices smooth layer. SLs grown on GaAs substrates (GaAs-based SLs) showed well-resolved satellite peaks in XRD. GaSb-based SLs with better structural quality and smoother surface showed strong photoluminescence at 2.55 μm with a full width at half maximum (FWHM) of 20 meV, narrower than 31 meV of GaAs-based SLs. Inferior optical absorption of GaAs-based SL was observed in the range of 2―3 μm. Photoresponse of GaSb-based SLs showed the cut-off wavelength at 2.6 μm.

关键词： InAs/GaSb superlattice substrates infrared detector

Cluster structure prediction via CALYPSO method

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Chinese Physics B 2019年第10期28卷 1-9页

作者： Yonghong Tian weiguo sun Bole Chen Yuanyuan Jin Cheng Lu Department of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China Centre for Science at Extreme Conditions and SUPA School of Physics and AstronomyThe University of EdinburghEdinburgh EH9 3FDUnited Kingdom School of Mathematics and Physics China University of Geosciences(Wuhan)Wuhan 430074China Department of Physics and Astronomy University of NevadaLas VegasNevada 89154USA

Cluster science as a bridge linking atomic molecular physics and condensed matter inspired the nanomaterials development in the past decades, ranging from the single-atom catalysis to ligand-protected noble metal clusters. The corresponding studies not only have been restricted to the search for the geometrical structures of clusters, but also have promoted the development of cluster-assembled materials as the building blocks. The CALYPSO cluster prediction method combined with other computational techniques have significantly stimulated the development of the cluster-based nanomaterials. In this review, we will summarize some good cases of cluster structure by CALYPSO method, which have also been successfully identified by the photoelectron spectra experiments. Beginning with the alkali-metal clusters, which serve as benchmarks, a series of studies are performed on the size-dependent elemental clusters which possess relatively high stability and interesting chemical physical properties. Special attentions are paid to the boron-based clusters because of their promising applications. The NbSi12 and BeB16 clusters, for example, are two classic representatives of the silicon-and boron-based clusters, which can be viewed as building blocks of nanotubes and borophene. This review offers a detailed description of the structural evolutions and electronic properties of medium-sized pure and doped clusters, which will advance fundamental knowledge of cluster-based nanomaterials and provide valuable information for further theoretical and experimental studies.

关键词： CALYPSO method cluster structure prediction boron cluster silicon cluster

Studies on the analytical potential energy function of diatomic molecular ion XY^+ using variational method

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Science China(Physics,Mechanics & Astronomy) 2004年第2期47卷 154-164页

作者： LIU Guoyue1,3, sun weiguo1,2 & FENG Hao1 1. Institute of Physics, Sichuan University, Chengdu 610065, China 2. College of Chemical Engineering, Sichuan University, Chengdu 610065, China 3. Mianyang Teacher抯 College, Mianyang 621000, China Correspondence should be addressed to sun weiguo (e-mail: weiguosun@*** or guoyueliu@ ***) Institute of Physics Sichuan University Chengdu China Mianyang Teacher's College Mianyang China College of Chemical Engineering Sichuan University Chengdu China

A new analytical potential energy function for diatomic molecular ion XY+ is proposed based on the energy consistent method (ECM). The Coulomb potential included in the new ionic potential contains multipole corrections, converges quickly and is variationally, changeable. The new potential and the ECM are applied to variationally studying the potential energies of eight electronic states of several diatomic molecular ions: the A2π state of CO+, the X2∑ g + state of Li 2 + , the X2∑ g + state of He 2 + , the 12∏u state of Na 2 + , the A2∏u state of N 2 + , the X1∑+ state of KrH+, the X2∑+ state of SiO+ and the A2π state of SO+ ion. The present results agree excellently with the experiment-based Rydberg-Klein-Rees (RKR) potentials, and are superior to the commonly used Huxley-Murrell-Sorbie (HMS) analytical potentials, and are better in some cases than some quantum mechanicalab initio potentials in the ionic asymptotic and dissociation regions.

关键词： potential energy, diatomic ion, electronic state, variational method.

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朝鲜王朝前期白银禁用之因由与影响

学术研究 2019年第10期 116-126,178页

作者：孙卫国南开大学历史学院

朝鲜王朝前期,朝鲜历经数十年请求,终于使得明朝在宣德四年免除其金银岁贡,虽然这是朝鲜王朝在与明朝宗藩交往中的一次胜利,但也带来严重后果,最为直接的后果就是朝鲜王朝在境内全面禁止使用金银。这一政策,使朝鲜王朝原本并不发达的货... 详细信息

朝鲜王朝前期,朝鲜历经数十年请求,终于使得明朝在宣德四年免除其金银岁贡,虽然这是朝鲜王朝在与明朝宗藩交往中的一次胜利,但也带来严重后果,最为直接的后果就是朝鲜王朝在境内全面禁止使用金银。这一政策,使朝鲜王朝原本并不发达的货币经济深受影响,白银既不能作为货币流通,也禁止用作器具。朝鲜严禁朝天使携带白银前往北京,使行人员只得携人参前往。该政策后来虽有所松动,但由于担心明朝恢复金银岁贡,使得朝鲜时时重申禁令。朝鲜官府掌控有限的白银,以备应付明朝使臣与日本贸易之需。明朝中后期就实行了白银货币化,日本也在16世纪初发现了大量的白银。禁用白银的朝鲜王朝,既难以跟明朝做生意,也难以胜任与日本贸易。直到壬辰倭乱爆发,朝鲜才解除禁令,慢慢融于白银化的世界之中。

关键词：明代中朝宗藩关系岁贡白银货币化朝鲜王朝前期日朝关系

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明抗倭援朝水师统帅陈璘与露梁海战

南开学报（哲学社会科学版） 2020年第4期 161-172页

作者：孙卫国南开大学历史学院天津300350

万历朝鲜之役中,明水师统帅陈璘两度被征召,壬辰时期虽未能前往,但已引起朝鲜君臣关注。丁酉再乱之初,陈璘再次被任命为水师统帅,率部前往。明水师部队两万余将士,来自广东、浙江、福建等地,大大扭转了朝鲜水师的劣势。朝鲜国王李昖会... 详细信息

万历朝鲜之役中,明水师统帅陈璘两度被征召,壬辰时期虽未能前往,但已引起朝鲜君臣关注。丁酉再乱之初,陈璘再次被任命为水师统帅,率部前往。明水师部队两万余将士,来自广东、浙江、福建等地,大大扭转了朝鲜水师的劣势。朝鲜国王李昖会见之时,陈璘当面提出要掌控中朝水师联合部队的指挥权,朝鲜君臣心有不甘,水军统制使李舜臣虽心有不服,但也只得维持这样的局面。陈璘对此似有所感,经常给朝鲜国王上揭帖,汇报战争情况,以消除朝鲜君臣疑虑。1598年十一月十九日,陈璘指挥中朝水师联合舰队在露梁海峡拦截岛津义弘的水军,李舜臣为先锋,明七十老将邓子龙奋勇争先,二人皆战死,但最终取得了露梁海战大捷。每次海战,陈璘皆为总指挥,故以他为首功,合乎情理,朝鲜史料说他夺李舜臣之功为己功,乃不实之词。陈璘与李舜臣后来都被尊为朝鲜王朝关王庙从祀的对象,成为朝鲜王朝追思明朝的一个象征。

关键词：万历朝鲜之役陈璘李舜臣露梁海战中朝联合水师

改革开放四十年来古代中国与朝鲜半岛关系史研究述要

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暨南学报（哲学社会科学版） 2020年第9期42卷 16-36页

作者：孙卫国南开大学历史学院

中国与朝鲜半岛古代关系史的研究萌芽于1949年前,正常发展则是改革开放以后,尤其是1992年中韩建交以来,得以蓬勃发展。中国朝鲜史学会日益壮大,学术刊物日益增多,学术会议日益频繁,学术成果日益丰硕,中韩学术交流日益密切,成为改革开放... 详细信息

中国与朝鲜半岛古代关系史的研究萌芽于1949年前,正常发展则是改革开放以后,尤其是1992年中韩建交以来,得以蓬勃发展。中国朝鲜史学会日益壮大,学术刊物日益增多,学术会议日益频繁,学术成果日益丰硕,中韩学术交流日益密切,成为改革开放以来中国与朝鲜半岛关系史学术发展的总体趋势。随着新一代学人的崛起,这个领域的研究将会迎来新的发展。

关键词：中韩(朝)关系史朝鲜半岛韩国研究中心中朝文化交流史

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万历抗倭援朝战争中的明朝商人

史学月刊 2023年第1期 47-55页

作者：孙卫国南开大学历史学院天津300350

在琉、日的明朝商人陈申、许仪后等获悉丰臣秀吉将发动侵略明朝的战争,想方设法将消息传回国内。随后,许仪后成为明朝去日本打探消息的线人,他总是尽可能为明朝提供帮助。明朝从商人手上征集粮草,指令商船协助运送粮饷,又召募行商前往朝... 详细信息

在琉、日的明朝商人陈申、许仪后等获悉丰臣秀吉将发动侵略明朝的战争,想方设法将消息传回国内。随后,许仪后成为明朝去日本打探消息的线人,他总是尽可能为明朝提供帮助。明朝从商人手上征集粮草,指令商船协助运送粮饷,又召募行商前往朝鲜,为明军将士提供生活必需品,以弥补朝鲜商业不发达、不用白银为流通货币的缺陷。朝鲜不满于明朝行商赚走明军将士白银和大量购买朝鲜人参、水铁等物品,不准他们租用粮船,拒绝为他们运送物品,并借机加以打击;同时希望留置水铁制品,以便为其制造火器。本次战争对于商人的依仗,也体现了明朝商人在万历年间较高的社会地位。战争结束不久,朝鲜即开放白银禁令,最终融入白银世界之中。

关键词：万历抗倭援朝战争许仪后明朝行商白银世界明代中朝关系