检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

核反应总截面和奇异结构研究

物理学进展 2001年第3期21卷 278-302页

作者：蔡翔舟沈文庆中国科学院上海原子核研究所上海201800

本文总结了晕和皮等奇异核子结构研究的现状 ,介绍了发现晕和皮现象的实验证据。然后集中介绍了利用奇异核反应总截面的实验测量和理论模型 ,从中提取奇异核物质半径、核内核子分布以及介质中的核子核子碰撞截面等重要信息 ,我们将特... 详细信息

本文总结了晕和皮等奇异核子结构研究的现状 ,介绍了发现晕和皮现象的实验证据。然后集中介绍了利用奇异核反应总截面的实验测量和理论模型 ,从中提取奇异核物质半径、核内核子分布以及介质中的核子核子碰撞截面等重要信息 ,我们将特别强调通过实验测量和理论模型之间的联系来研究奇异结构性质。

关键词：放射性核束核反应总截面核物质状态方程晕结构奇异核子结构皮结构

在线全文

学校读者我要写书评

暂无评论

锗膜沉积工艺的实验研究

红外研究 1989年第5期8卷 343-348页

作者：许培忠严义埙中国科学院上海技术物理研究所

实验研究发现,采用离子束辅助沉积技术能改进膜层的性能,消除或减小膜层的应力.由实验得到:为保证锗膜具有较好的光学性能和机械性能,基底温度须加热至约150℃;对锗膜比较适合的离子束能量约为150eV;束流密度约为50μA/cm^2.

关键词：薄膜锗膜沉积技术

A new ordered phase forming during ageing in Cu-Ti alloys

在线全文

学校读者我要写书评

暂无评论

chinese Science Bulletin 1997年第19期42卷 1671-1672页

作者： WEI Yinghui and WANG Xiaotian1. Department of Materials Science, Taiyuan University of Technology, Taiyuan 03002., china 2. College of Materials Science, Xi’an Jiaotong University, Xi’an 710049, china ion beam {2.oratory Shanghai Institute of Metallurgy Chinese Academy of Sciences Shanghai 200050 China

AGE-hardened Cu-Ti has been an important alloy of investigation in the field of continuousphase transformation due to its complicated transformation processes which involve short rangeordering (SRO), spinodal decomposition (SD), long range ordering (LRO), etc. So far, ithas been a controversial topic whether each process exists, and in what sequence they pro-ceed.

关键词： Ti Cu A new ordered phase forming during ageing in Cu-Ti alloys

Cross-section for D（p,p）D elastic scattering from 1.8 to 3.2.MeV at the laboratory angle of 155° and 165°

在线全文

学校读者我要写书评

暂无评论

Cross-section for D（p,p）D elastic scattering from 1.8 to 3...

中国化学会第2.届学术年会现代核化学与放射化学分会场

作者： W Ding1, L Q Shi2. B Zhang2. X G Long1, S Z Luo1, S M Peng1, X J Xia2.1institute of Nuclear Physics and Chemistry, china {2. of Engineering Physics, Chengdu 610003, People’s Republic of china 2.pplied ion beam Physics laboratory, institute of Modern Physics, Fudan University, shanghai 2.0433, People’s Republic of china

＜正＞Cross-section data for D（p,p）D elastic scattering from 1.8 to 3.2.MeV at both laboratory angle of 155° and 165° were measured with using a Ni/TiDx/Ta/Al sample in this work. The thickness of the Al substrate is about 6 μm, on which deposited a layer of Ta, Ti and Ni in turn. The areal density of metal elements in the multilayer film was measured with RBS analysis by using a 4.0 MeV 4He ion beam, and the areal density of the deuterium absorbed in the sample was measured with ERD analysis by using a 6.0 MeV 16O ion beam. Measurements and analysis show that the cross-sections of p-D elastic scattering under this experimental condition were much enhanced compared with Rutherford cross-section, and there is a good linear relationship between the enhancement multiple σD/σRu and the incident energy E at both angles. This kind of linear relationship was shown in Fig.1, and the linear regression results were that at the angle of 155°σD/σRu=551.4 （E?0.958）, and at the angle of 165°σD/σRu=581.2.（E?1.010） where σD is the measured cross-section, σRu is the Rutherford cross-section, and E is the incident proton energy in laboratory frame with the unit of MeV. The total uncertainties in the measurements were less than 7.5%.

关键词： Elastic scattering cross-section Proton Deuterium

The influence of post annealing on structure and electronic characteristics of HfSio(N)dielectrics prepared by duaI ion beam sputtering

在线全文

cnki会议

学校读者我要写书评

暂无评论

The influence of post annealing on structure and electronic ...

第十五届全国等离子体科学技术会议

作者： X.M.Yanga,c~,X.M.Wua,b~,,L.J.zhugeb,c,H.Y.Zhanga,c,C.G.Jina,c,F.Wanga,c aDepartment of Physics,Soochow university,Suzhou2.5006,china bAnalysis and Testing Center,Soochow university,Suzhou2.5006,china cThe Key {2.oratory of Thin Films of jiangsu,Soochow university,Suzhou2.5006,china dState Key {2.oratory of Functional Materials for Informatics,shanghai institute of Microsystem and information Technology,chinese academy of {12.,865 Changning Road,shanghai 200050,china

HfSiO(N) films were prepared on Si substrates by using dual ion beam sputtering deposition(DIBSD).Structure and electronic properties of the film with different annealing temperature were investigated.X-ray photoelectron spectroscopy (XPS) spectra showed that silicidation action occurs by annealing at 850 and 900℃for HfSiO and HfSion film,*** annealing at 900 and 950"C,metallization reaction was rapidly promoted for the HfSiO and HfSion film,*** incidence X-ray diffraction(GI-XRD) patterns indicated crystallization in the HfSiO and HfSion film after 850 and 900"C respectively.C-V measurements indicated that the dielectric constants for the HfSiO and HfSion film were 17.1 and 18.7, *** oxide-charge densities were found to be 5.6x10" for the HfSiO film and 2.2.10 cm for the HfSion film.Ⅰ-Ⅴcharacteristics showed that the leakage current density(1.3×10 and 5.9×10 A/m at(V-1) V) was obtained after 900 and 950℃annealing for HfSiO and HfSion film,*** of these indicated that the electrical performance of HfSiO gate dielectrics had a lager improvement through nitrogen incorporation.

关键词：

ENHANCE GAS-SENSING CHARACTERISTICS OF SENSORS BY ELECTRON beam RADIATion

在线全文

cnki会议

学校读者我要写书评

暂无评论

ENHANCE GAS-SENSING CHARACTERISTICS OF SENSORS BY ELECTRON B...

第二届国际传感器科学研讨会

作者： Zheng JIAO, Zhen LI, Minghong WU, Yanli WANG, Deqing WANG shanghai Applied Radiation {2., shanghai University, shanghai 2.1800, P. R. china

The gas-sensing properties of sensors are influenced by the oxygen stoichiometry of the surface. The oxygen surface ion is candidate for the sensor’s response to gases. In this paper electron beam radiation is used t...

关键词：

An empirical formula for Single-Electron Detachment cross sections of negative ions in collision with Ar

在线全文

cnki会议

学校读者我要写书评

暂无评论

An empirical formula for Single-Electron Detachment cross se...

第十六届全国原子与分子物理学术会议

作者： Xue Bai,Zhixian Geng,Baoren Wei,Xuemei Zhang~* Applied ion beam Physics {2.oratory,Fudan University,Key {2.oratory of the ministry of Education,china institute of Modern Physics,Department of Nuclear Science and Technology.Fudan University,shanghai 2.0433. china

By using least square method,we analyze and scale some experimental data of Single-Electron Detachment(SED) cross sections for different negative ions collision with Ar that some of them are obtained from other laboratorial experim ental data,and get a good empirical *** is found that the detachment cross section is increasing as the electron affinity *** the ion velocity increases,the cross section become weaker affected by the ion electron affinity.

关键词：

Synthesis, structure and characterization of binuclear copper(Ⅱ) complexes

在线全文

cnki会议

学校读者我要写书评

暂无评论

chinese Journal of Chemistry 1997年第1期15卷 76-83页

作者： YANG, Rui-Na XUE, Bao-Yu WANG, Dong-Mei JIN, Dou-Man Henan institute of Chemistry, Zhengzhou, Henan 450003, chinaCHEN, Jun LI, Ming-Xing Department of Chemistry, Fudan University, {2. 2.0433, china

At room temperature, dibenzoyl peroxide undergoes oxidative addition reaction with metallic copper powder and pyridine N-oxide (triphenylphosphine oxide or 2.9-dimethyl-4,7-diphenyl-1,10-phenanthrolin) which affords the last products as binuclear copper(II) complexes, [Cu(C5H5NO)-(C6H5COO)2.2.1), [Cu(OPPh3)(C6H5COO)2.2.2. and [Cu(C6H5COO)(C2.H2.N2.](3, C2.H2.N2.is 2.9-dimethyl-4,7-diphenyl-1,10-phenanthrolin). The structure of the complexes were characterized by elemental analyses, IR spectra, TG-DTA and magnetic property. Crystals(1) are triclinic, space group P1,a=0.92.17(36),b=1.06973(17), c=1.08813(2.) nm, a=59.60(2.°, β=74.83(3)°,γ=72.80(2.°, V=0.880 nm3, Dc=1.52. g/cm3, Z=1, R=0.044, Rw=0.048, Mr=805.78, 3477 reflections with I > 3σ(I). Each copper(Ⅱ) ion is coordinated by two bridging bidentate benzoate ligands and one pyridine N-oxide or triphenylphosphine oxide to form dimeric binuclear molecules. The structure of the compound(1) shows a clear centre of symmetry.

关键词： Copper binuclear complex oxidative addition

在线全文

学校读者我要写书评

暂无评论

鼠类移植癌肿的自体荧光研究

中国激光 1990年第1期17卷 61-63页

作者：吴叔明罗鸿伃萧树东杨远龙叶衍铭李黎明张素胤上海消化疾病研究所复旦大学物理系激光研究室中国科学院上海药物研究所

一、引言本报道用氙离子激光作激发光源,对4只正常昆明小白鼠、5只SD大白鼠和4只正常BALB/C裸鼠以及4只移植S-180平滑肌肉瘤的昆明小白鼠,12.移植人胃癌、肝癌和肺癌的BALB/0裸鼠作了皮肤、胃粘膜,肝脏和移植瘤的自体荧光的光谱分析,... 详细信息

一、引言本报道用氙离子激光作激发光源,对4只正常昆明小白鼠、5只SD大白鼠和4只正常BALB/C裸鼠以及4只移植S-180平滑肌肉瘤的昆明小白鼠,12.移植人胃癌、肝癌和肺癌的BALB/0裸鼠作了皮肤、胃粘膜,肝脏和移植瘤的自体荧光的光谱分析,发现大白鼠和小白鼠的胃粘膜在690nm/(±2.nm)处有荧光峰出现,小白鼠的移植瘤在630nm(±2.nm)处有荧光峰,而皮肤则无。裸鼠皮肤和胃粘膜在690nm处有荧光峰。

关键词：鼠类移植癌肿自体荧光光谱分析