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Measurement of yields and angular distributions ofγ-quanta from the interaction of 14.1 Mev neutrons with oxygen,phosphorus,and sulfur

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Chinese Physics C 2024年第3期48卷 79-92页

作者： D.N.grozdanov N.A.Fedorov S.B.Dabylova Yu.N.Kopatch I.N.Ruskov v.R.Skoy T.Yu.Tretyakova C.Hramco P.I.Kharlamov g.v.Pampushik P.g.Filonchik A.v.andreev Joint Institute for Nuclear Research(JINR) DubnaRussia Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of SciencesSofiaBulgaria Faculty of Physics Lomonosov Moscow State UniversityMoscowRussia L.N.gumilyov Eurasian National University AstanaKazakhstan Skobeltsyn Institute of Nuclear Physics Moscow State UniversityMoscowRussia Institute of Chemistry of Moldova ChisinauRepublic of Moldova Moscow Institute of Physics and Technology MoscowRussia

A study of the inelastic scattering of neutrons with an energy of 14.1 Mev on the nuclei of oxygen,phosphorus,and sulfur was performed at the TANgRA facility at JINR(Dubna).The experiment aimed to refine existing data and obtain new data on the yields and angular distributions ofγ-quanta emitted by the studied nuclei due to neutron-induced nuclear reactions using the tagged neutron *** types of detector systems were used to registerγ-***γ-ray yields were measured using a high-purity germanium(HPge)*** angular distributions ofγ-rays were obtained using a system of 18 scintillation detectors based on bismuth germanite Bi_(4)ge_(3)O_(12)(BgO)located around the *** performed experiments measured the yields of two transitions for the reaction of tagged neutrons with 16O,nine transitions for the reaction with ^(31)P,and nine transitions for the reaction with ^(32)S for the first *** angular anisotropy of theγ-radiation accompanying the inelastic scattering of neutrons with an energy of 14.1 Mev on ^(31)P nuclei was also measured for the first time.

关键词： tagged neutron method yields of gamma-quanta high-resolution gamma-spectrometry neutron-nuclear reactions neutron scattering

Prompt neutron emission in ^(250)No spontaneous fission associated with ground and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： R.S.Mukhin A.v.Isaev A.v.andreev M.L.Chelnokov v.I.Chepigin H.M.Devaraja I.N.Izosimov A.A.Kuznetsova O.N.Malyshev A.g.Popeko Yu.A.Popov A.Rahmatinejad B.Sailaubekov T.M.Shneidman E.A.Sokol A.I.Svirikhin M.S.Tezekbayeva M.A.Bychkov A.v.Yeremin O.Dorvaux B.gall K.Kessaci K.Hauschild A.Lopez-Martens Joint Institute for Nuclear Research Dubna141980Russia Dubna State University Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan L.N.gumilyov Eurasian National University Astana010008Kazakhstan Kazan Federal University Kazan420008Russia Universitéde Strasbourg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)Pb(^(48)Ca,2n)^(250)No was used to study two activities of^(250)No with distinct half-lives.A total of 1357 events were observed in the SFiNx neutron detection *** average number of neutrons emitted per spontaneous fission of^(250)No was determined to be(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the ground state and K-isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

Postglacial incision-infill cycles at the Borisoglebsk Upland: Correlations between interfluve headwaters and fluvial network

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International Soil and Water Conservation Research 2019年第2期7卷 184-195页

作者： Yuliya v.Shishkina Ekaterina v.garankina vladimir R.Belyaev Ilya g.Shorkunov Pavel v.andreev Aleksey I.Bondar viktoria I.Potapova Tatiana A.verlova Faculty of geography Department of Geomorphology and Palaeogeography and Laboratory for Soil Erosion and Fluvial ProcessesLomonosov Moscow State UniversityLeninskie Gory1Moscow 119991Russia Institute of geography Department of Soil Geography and EvolutionRussian Academy of SciencesStaromonetnyj Lane29Moscow 119017Russia Institute of Earth Sciences of Saint-Petersburg State University St.PetersburgUniversitetskaya nab.7-9 199034Russia

The article discusses postglacial landscape transformation in the Northern Hemisphere Middle Pleistocene glaciation area located in the center of the Russian *** attempted to verify the regional paleogeographic model by reconstructing the Late Pleistocene incision-infill cycles at the Eastern Borisoglebsk Upland based on a comparison of inactive interfluves headwaters and actual fluvial network *** study was also aimed to determine the past extent of fluvial *** research of the actual and buried topography,Ethology and pedogenic properties of surface deposits was carrid out with remote sensing data interpretation,DgPS survey,and detailed description of geological cores *** study was followed by analysis of grain size,chemical and organic contents,microstructure,and numerical *** the available results,we propose a scenario of the fluvial network transformation at the Eastem Borisoglebsk Upland over the last 150 *** least four fluvial incision stages were determined while network extent has significantly changed through the Late *** can be generally associated with the regional base level decrease-Late Moscow,Late valdai and Late Holocene and accompanying isolation of the Nero Lake terraces of 130 m,100-105 m and 95-98 *** stages were separated by landscape stability or aggradation periods those were asynchronous at the middle and upper parts of the fluvial *** main agent of initial valley infill appears to be local lacustrine sedimentation altered by alluvial and colluvial deposition towards the second half of *** landscape conditions variability emphasize the importance of comprehensive local correlations for regional retrospective models.

关键词： Interfluve headwaters Fluvial Incision-Infill Cycle Pleistocene

Nanostructured TiO2(B):the effect of size and shape on anode properties for Li-ion batteries

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Progress in Natural Science:Materials International 2013年第3期23卷 235-244页

作者： Zheng Liu Yuri g.andreev A.Robert Armstrong Sergio Brutti Yu Ren Peter g.Bruce School of Chemistry and EaStChem University of St AndrewsSt AndrewsFife KY16 9STUK Dipartimento di Scienze Unversità della BasilicataV.le Ateneo Lucano 10Potenza 85100Italy National Institute of Clean-and-low-carbon Energy(NICE) Future Science& Technology CityChangping

Reducing the dimensions of electrode materials from the micron to the nanoscale can have a profound influence on their properties and hence on the performance of electrochemical devices,***-ion batteries,that employ such ***2(B) has received growing interest as a possible anode for Li-ion batteries in recent *** offers the possibility of higher energy storage compared with the commercialized ***,nanowire,nanotube,and nanoparticle morphologies have been prepared and ***,to date these materials have not be compared in one *** the current review we first summarize the different synthesis methods for the preparation of nanostructured TiO2(B);then present the effects of size and shape on the electrochemical *** TiO2(B) with nanometer dimensions exhibit a higher capacity to store Li,regardless of rate,due to structural distortions inherent at the nanoscale.

关键词： TiO2(B) Synthesis Anode Nanostructure Li-ion batteries

Angular Anisotropy of the Fission Fragments in the Dinuclear System Model

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原子核物理评论 2015年第2期32卷 175-179页

作者： T.M.Shneidman A.v.andreev C.Massimi M.T.Pigni g.vannini A.ventura 周善贵 Joint Institute for Nuclear Research Institute of Theoretical Physics Chinese Academy of Sciences Kazan Federal University Istituto Nazionale di Fisica Nucleare Sezione di Bologna Dipartimento di Fisica dell Universit`a di Bologna Nuclear Data Criticality Safety Oak Ridge National Laboratory

A theoretical evaluation of the collective excitation spectra of nucleus at large deformations is possible within the framework of the dinuclear system(DNS) model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of nucleons between clusters. In this work the method of calculation of the potential energy and the collective spectrum of fissioning nucleus at scission point is presented. Combining the DNS model calculations and the statistical model of fission we calculate the angular distribution of fission fragments for the neutron–induced fission of239 Pu.

关键词： cluster states in nuclei dinuclear system fission angular anisotropy

Resources of coal methane and problems in their development

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global geology 2006年第2期9卷 173-175页

作者： A.v.andreev Far Eastern State Technical University Vladivostok 690060Russia

The coal deposits methane is one of the type ecological mineral-raw materials *** methane reasonable extract from coal-methane deposits at the same time with mining of *** is the most economical way of the coal methane *** Russian coal basins are a large domestic raw materials base for energy,metallurgical and coke *** are the 77% of all mines have volume of gas in Kuzbass,vorkuta and other mining industrial regions of *** coal deposits is disposed the most largest in the world coal deposits and are most methane-bearing capacity coal seams:8.1 kg/t methane of coal,to compare with 7.4 kg/t in great Britain,6.7 kg/t in China,5.0 kg/t in USA and 3.6 kg/t in germany.

关键词：煤资源甲烷发展沉淀物

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不同纯度金属铍热处理时剩余电阻的变化

稀有金属材料与工程 2007年第8期36卷 1354-1357页

作者：张青来 Bondarev A B andreev v A 王粒粒胡永学江苏大学 Industrial Center MATEKS Ltd Moscow 121596Russia

运用测量剩余电阻的方法,研究了4.2K温度时不同纯度的铍中剩余相的分解与其溶解动力学。结果表明:时效有效温度取决于金属中含有杂质的数量,随杂质数量的增加而提高;高纯度铍(～99.94%)如微合金一样也具有时效倾向;应用剩余电阻概念研... 详细信息

运用测量剩余电阻的方法,研究了4.2K温度时不同纯度的铍中剩余相的分解与其溶解动力学。结果表明:时效有效温度取决于金属中含有杂质的数量,随杂质数量的增加而提高;高纯度铍(～99.94%)如微合金一样也具有时效倾向;应用剩余电阻概念研究纯铍内部结构转变是非常有效的方法,它可记录时效过程初始阶段的变化(如400℃铍中扩散分解),这些变化用微观观察或X射线衍射分析很难得到。

关键词：剩余电阻铍时效动力学

Negative thermal expansion in one-dimension of a new double sulfate AgHo(SO_(4))_(2)with isolated SO_4 tetrahedra

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Journal of Materials Science & Technology 2021年第17期76卷 111-121页

作者： Yuriy g.Denisenko victor v.Atuchin Maxim S.Molokeev Naizheng Wang Xingxing Jiang Aleksandr S.Aleksandrovsky Alexander S.Krylov Aleksandr S.Oreshonkov Alexander E.Sedykh Svetlana S.volkova Zheshuai Lin Oleg v.andreev Klaus Müller-Buschbaum Institute of Chemistry Tyumen State University.Tyumen625003Russia Institute of Inorganic and Analytical Chemistry Justus-Liebig-University of Giessen35392Giessen.Germany Department of general and Special Chemistry Industrial University of TyumenTyumen625000Russia Laboratory of Optical Materials and Structures Institute of Semiconductor PhysicsSB RASNovosibirsk630090Russia Laboratory of Semiconductor and Dielectric Materials Novosibirsk State UniversityNovosibirsk630090Russia Research and Development Department.Kemerovo State University Kemerovo650000Russia Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Siberian Federal University Krasnoyarsk660041Russia Department of Physics Far Eastern State Transport UniversityKhabarovsk680021Russia Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing100190China Laboratory of Coherent Optics Kirensky Institute of Physics.Federal Research Center KSC SB RASKrasnoyarsk660036Russia Institute of Nanotechnology Spectroscopy and Quantum ChemistrySiberian Federal UniversityKrasnoyarsk660041Russia Laboratory of Molecular Spectroscopy Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Center for Materials Research(LaMa) Justus-Liebig-University GiessenGiessen35392Germany University of the Chinese Academy of Sciences Beijing100049China Laboratory of the Chemistry of Rare Earth Compounds Institute of Solid State ChemistryUB RASEkaterinburg620137Russia

A double holmium-silver sulfate was obtained for the first *** temperature intervals for the formation and stability of the compound were determined by differential scanning *** crystal structure of AgHo(SO_(4))_(2)was determined by Rietveld *** X-ray diffraction(XRD)analysis showed that the compound crystallizes in the monoclinic syngony,space group P2_1/m,with the unit cell parameters a=4.71751(4)A,b=6.84940(6)A and c=9.89528(9)A,β=95.1466(4)·,v=318.448(5)A^(3),Z=2,R_B=1.55%,T=303 *** types of sulfate tetrahedra were found in the structure,which significantly affected the spectral properties in the infrared *** the temperature range of 143-703 K,a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was *** was established that negative thermal expansion is the result of the deformation of sulfate tetrahedra,which is affected by the movement of holmium and silver *** excitation in the blue spectral range(457.9 nm)produces a luminescence in light blue(489 nm),green(545 nm)and red(654 nm)spectral ranges,and the latter two were of comparable intensity that is favorable for WLED *** observed luminescent band distribution is ascribed to the specific crystal field at Ho^(3+)ion sites rather than a variation of radiationless probability.

关键词： Sulfate Crystal structure Thermal expansion Raman Photoluminescence Band structure

CO激光在非线性晶体ZngeP_2和gaSe中的混频效应(英文)

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光学精密工程 2012年第2期20卷 277-286页

作者：张来明谢冀江郭劲陈飞姜可 andreev YU M IONIN A A KINYAEvSKIY I O KLIMACHEv YU M KOZLOv A YU KOTKOv A A LANSKII g v SHAIDUKO A v 中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室吉林长春130033 俄罗斯科学院西伯利亚分院气候与生态系统监测研究所托木斯克俄罗斯634055 俄罗斯科学院列别捷夫物理所俄罗斯莫斯科119991

为了获得2.15～1 500μm的相干光源,研究了CO激光在高质量非线性晶体ZngeP2和gaSe中的混频效应。为了提高转换效率,在激光锁模方式下对CO激光器的二次谐波、和频和差频的产生进行了研究。结果显示,利用gaSe晶体和ZngeP2晶体,调Q多谱线C... 详细信息

为了获得2.15～1 500μm的相干光源,研究了CO激光在高质量非线性晶体ZngeP2和gaSe中的混频效应。为了提高转换效率,在激光锁模方式下对CO激光器的二次谐波、和频和差频的产生进行了研究。结果显示,利用gaSe晶体和ZngeP2晶体,调Q多谱线CO激光辐射的谱线内倍频效率分别大于0.3%和1.1%。采用ZngeP2晶体进行倍频时,可调谐锁膜CO激光器的转换效率为12.5%。模拟结果显示,二次谐波与和频产生的输出光谱相同。相邻谱线下,和频和差频的产生过程中,基波和一次谐波可以分别在4.0～5.0μm和100～≥1 200μm(太赫兹范围)形成振荡。利用锁模CO激光器在ZngeP2晶体中的混频效应,可以得到2.15～≥1 500μm的相干光源,同时转换效率可达到甚至高于12.5%。

关键词：非线性晶体 ZngeP2晶体 gaSe晶体混频效应脉冲CO激光锁模