最新刊期
      卷 0 ， 期 0 ， 2020
      • Fang Qinxue
        Issue 8, (1994)
        摘要：An aluminium or aluminium-magnesium coating with a thickness of 120 nm on low carbon steel EN8 is irradiated with a 65keV beam to an intensity of 6×1016Ar2+ /cm2.Corrosion resistance of the samples its studied with the multi-sweep cyclic polarization curve.The results prove that aluminium coating can increase effectively corrosion resistance of the samples.When magnesium is in the interface but not form a pure magnesium layer the cathodic protection of magnesium is observed in the experiment.  
        关键词：Ion beam mixing;Coating;Corrosion;Cathodic protection   
        8
        |
        53
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408067 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：Various applications of computer simulation to high energy backscattering analysis were systemetically summarized.With the aid of the data measured in the accelerator lab at Fudan University,the data base of the computer simulation program RUMP was renewed to make it applicable to higher energy region.Some experimental results to elucidate superiority of the simulation were given and a new approach for quick calculation of non-Rutherford backscattering cross section based on the simulation principle was suggested.Experimental resultS of 4He-12C scattering were also presented.  
        关键词：Computer simulation;High energy backscattering;Scattering cross section   
        10
        |
        66
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408091 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：he time-resolved reflectivity（TRR） technique has been used to measure the solid phase epitaxial growth rate and the thickness of epitaxial layer for Si+ and As+implanted single crystalline wafers.The thickness of amorphous layer for the As-implanted samples has been determined by backscattering-channeling analysis to confirm the measured TRR results.The principle of the TRR technique is introduced and the experimental result is discussed.  
        关键词：Crystal silicon;Ion implantation;Solid phase epitaxy;Reflectivity   
        8
        |
        36
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408110 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：A portable cosmic neutron measurement instrument and its auxiliary device were discussed in detail. Monitoring of cosmic neutron current in Chengdu showed that intensity of cosmic neutron current changed regularly in different meteorological conditions.Applications of the information on cosmic neutrons in engineering geology,atmosphere environment and natural disaster prediction were also presented in this paper.  
        关键词：Cosmic neutrons;Reflection cosmic neutrons;Neutron measurement instrument   
        11
        |
        74
        |
        4
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408123 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：The quantitative distribution of As bounty on the cross section of single-crystalline silicon was studied by synchrotron radiation excited.X-ray fluorescence micro-analysis.The present results are useful both for the study of crystal growing theory and for the production of semiconductor materials.  
        关键词：Synchrotron radiation;X-ray fluorescence micro-analysis;As impurity   
        10
        |
        119
        |
        3
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408137 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：The ancient glaze of Western Han Dynasty from Tangpai,Hepu,Guangxi has been investigated by XRD,XRF methods.The XRD results showed that the glaze was real glass with the index of refraction in a range of 1.473-1.479,while the XRF analysis indicated that the contents of SiO2,KZO,CaO,Al2O3,Mgh and Na2O in the glass corresponded to 75.8%-79.0%,10.4%-14.5%,1.3%-2.1%,1.9%-2.7%,0.22%-0.50% and 0.21%-0.87% respectively,belonging to the Si-K vityeous system.The values of 207Pb/206Pb and 208Pb/206Pb in the range of 0.8746-0.8953 and 2.142-2.178 respectively,were close to the distribution of other Chinese early glass,but far from that of the European and Egyptian ones.Therefore,a conclusion can be reached that Si-K glass of Tangpai was made in China and impossible from foreign countries.  
        关键词：Ancient glass;Lead isotopes   
        10
        |
        212
        |
        13
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408152 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：Angular distributions of sputtered atoms and the phenamenon of element locally rich relative to microtopographic feature（ELR-MTF） of sputtered target surface have been investigated for Cu-37 at%Ag alloys by means of RBS,SEM and EPMA measurements.In this paper,emphasis will be put on the correlation between surface topography caused by Ar+ ion bombardment with different doses and angular distribution of sputtered atoms ejecting from various micro-zones at topographical surface during sputtering.The experiment result was explained with the so-called ELR-MTF model which can qualitatively interpret the shape of the angular distributions and the variation of the preferential sputtering curves.  
        关键词：Angular distribution;Preferential sputtering;Surface topography;Alloy   
        8
        |
        38
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408168 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：The light collection effciency of rectangular parallelepipedic plastic scintillators used for γray detection is studied with the Monte Carlo method and experimental measurements. For long and narrow scintillators with high length-to-width ratio up to 40,specular reflection behind a thin layer of air results in an optimum scintillation output and high detection efficiency.  
        关键词：Light collection efficiency;Plastic scintillators;Specular reflection;Diffuse reflection   
        11
        |
        269
        |
        19
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408206 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：In order to study the correlation of trace elements with liver cancer,the content of 11 elements of Cu,Ca,Mn,etc.in mice’s hair,brain,heart,lung,kidney,muscle and tumor tissues were determined by neutron activation analysis using a miniature neutron source reactor. The content of copper was analyzed by determining 1039.6keV γ-rays of 66Cu.The standard reference materials NBS-1577,IAEA-H4 and shrimp powder were also determined,of which the results were in agreement with the recommended values.  
        关键词：Mice;Organs;Neutron activation analysis;Trace elements;Miniature neutron source reactor   
        9
        |
        37
        |
        3
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408216 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：The biological effects of nitrogen ion implantation on different genotype rice（Oryza sativa L） were studied.The results showed that there were obvious differences in physiological damages for the M1 generation,mutation frequencies and mutagenic efficiencies of chlorophyll,heading date and plant height for M2 generation of different genotypes.Treated by nitrogen ions,the varieties with high mutation frequency and mutagenic efficiency of chlorophyll in the M2 generation were not necessarily high in those of heading date and plant height.Moreover, the radiation sensitivity of Fu8530 and Fuxian No.6 which were bred by using early maturing and semidwarf mutants as maternal plant was low.The early maturing and high stature mutation were not induced with these two varieties.  
        关键词：Nitrogen ions;Biological effects;Genotype;Rice   
        8
        |
        41
        |
        7
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408234 false
        发布时间：2021-04-09
      • Issue 8, (1994)
        摘要：In this paper the plastics-sealed diodes irradiated with 12 MeV electrons have been investigated. Excellent performance of the irradiated devices indicated the applicability of this technique.  
        关键词：Electron linear accelerator;Election irradiation;Plastics-sealed diodes   
        9
        |
        35
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 8408294 false
        发布时间：2021-04-09
      0