最新刊期
      卷 0 ， 期 0 ， 2020
      • CHEN Jingsheng,YU Guoqing,PAN Haochang,ZHU Dezhang,XU Hongjie
        Issue 9, (2000)
        摘要：Titanium nitride films were deposited on silicon(100) substrate at room temperature with various substrate bias voltages (corresponding to various impact energy) by energetic cluster impact (ECI). Atomic force microscope (AFM) and X-ray diffraction(XRD) were employed to characterize the morphology and structure of TiN films, respectively. The tribological properties of TiN films were investigated by a Vicker microhardness tester and SRV fretting wear tester. The results showed that the clusters were gently stocked one above the other in low bias voltage; the clusters broke apart and films with superior density, adhesion and smoothness were formed at high bias voltage. The films formed within certain range of bias, have (220) preferred orientation and possess high microhardness, low friction coefficient and good anti-wear property.  
        关键词：Energetic cluster;Structure;Morphology;Tribological properties   
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        发布时间：2021-03-12
      • ZHANG Tonghe,WU Yuguang
        Issue 9, (2000)
        摘要：Mo silicides with good properties were synthesized by using metal Mo ion implantation with large ion flux. It was found that the Mo silicides grown up and sheet resistance Rs decreased with increasing ion flux. The minimum Rs of 90Ω was obtained when the ion flux of 0.5A/m2 was used, it indicated that continuos layer of Mo silicides were formed. X-ray diffraction analysis showed that three kinds of Mo silicides of Mo3Si, Mo5Si3 and MoSi2 were formed in Mo implanted silicon. The quality of the silicides was improved further after annealing, if the sample was annealed at 900－℃ for 20s, the Rs decreased to 4Ω, the resistivity was 0.16 μΩ·m. TEM observation showed that the depth of continuos layer of Mo silicides was about 80nm  
        关键词：Mo ion implantation;Implanted silicon;Silicide synthesis;Rapid thermal annealing;Large ion flux   
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        发布时间：2021-03-12
      • SHI Ying,JIN Huijuan
        Issue 9, (2000)
        摘要：A cold-rolled low carbon steel with emulsified spots has been studied by Mossbauer effect. It is shown that the emulsified spots mainly consist of Fe3O4 and its heat-treatment process may be one of the important factors affecting their formation.  
        关键词：Mossbauer effect;Low carbon steel;Emulsified spot   
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        发布时间：2021-03-12
      • Issue 9, (2000)
        摘要：Some key techniques were applied to the CIT-2000M X-ray fluorescence analyzer. These techniques much improved the analysis results of the instrument.  
        关键词：Ores;Multi-element analying method;X-ray fluorescence;Tube-source exciting   
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        发布时间：2021-03-12
      • WANG Tieshan
        Issue 9, (2000)
        摘要：Low energy deuteriurn ion beam with high beam density was used to bombard deuterated metal target. In order to study the D-D reaction in solid, the relation of D-D reaction in solid and the material structure was studied by analyzing the charged particle spectra of D-D fusion. At the same time, the deuterium cluster-ion beam and deuteron beam were applied to identify the features of D-D fusion beyond the triplantation range of ions. An unknown peak, which appeared between the proton peak (3MeV) and triton peak (1MeV), was observed. It is identified to be proton peak of the D-D fusion, which occurred far beyond the ion beam implanting range in solid. The isolated deuteron gave higher fusion reaction yield, comparing with the deuteron in cluster-ion with the same velocity. Some interpretations about the experimental phenomena were discussed, based on the basic principles of beam-solid interaction and channeling effect.  
        关键词：Low energy deuterium ion beam;Deuterated metal target;D-D fusion beyond the implanting range   
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        发布时间：2021-03-12
      • ZHU Xiaodong,WEN Xiaohui,ZHAN Rujuan,ZHOU Haiyang
        Issue 9, (2000)
        摘要：Diamond films were deposited in electron assisted chemical vapor deposition (EACVD) reactor using two source mixtures of CH4-H2 and C2H5OH-H2, respectively. The plasma gas composition during diamond growing was investigated in situ using optical emission spectroscopy(OES). In two cases of C2H2OH-H2 and CH4-H2 plasma, it was shown that CH and CH+ were all important precursor species in the diamond deposition reaction while the yields of poor diamond films corresponded to the presence of the C2 emission line. The difference between these two cases was that some oxygen-containing species (CH2O, CHO and O2) were detected in the C2mOH-H2 plasma. The presence of these products may maintain the quality of the deposited diamond films while increasing carbon source concentration, and the growth rate was thus enhanced. These results imply that the increase in the growth rate of diamond film using C2H5OH-H2 mixture is primarily due to a change in gas phase environment.  
        关键词：Diamond film;Growth radical;Optical emission spectra   
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        发布时间：2021-03-12
      • ZHANG Qiangji,ZHANG Haitao,LU Ming
        Issue 9, (2000)
        摘要：The "helium blanketing effect (HBE)" which is a common phenomenon observed in the adsorption of Tritium by hydrogen storage materials, such as LaNi5 xAlx, has been investigated. By the experiment of hydrogen absorption the "bulk flow" model proposed by Ortman was verified. In order to know the mechanism of HBE surface analyses were performed. The results indicate that there is no measurable electronic interaction between the Ar+ and the hydrogen storage materials. A two-step model, bulk flow and diffusion flow, of hydrogen absorption has been proposed by the authors to describe the whole absorption process. The experimental data can be fitted and explained by this model successfully.  
        关键词：Hydrogen storage material;Helium blanketing effect;Bulk flow;Diffusion flow   
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        发布时间：2021-03-12
      • ZHOU Sichun,ZHAO Youqing,ZHANG Yuhuan
        Issue 9, (2000)
        摘要：The mineralizing heterogeneity effect in XRF sampling was investigated with theory of mathematical statistics. A method called "Optimum measuring Net" has been developed. The theoretical estimation and experimental results show that the mineralizing heterogeneity effect can be cut down to the minimum with the method.  
        关键词：XRF sampling;Mineralizing heterogeneity effect;Random sampling;Optimum measuring net   
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        发布时间：2021-03-12
      • GUO Qi,LU Wu,REN Diyuan,YU Xuefeng,ZHANG Guoqiang FAN Long,YAN Rongliang
        Issue 9, (2000)
        摘要：A measurement system to detect the radiation damage inside CMOS operational amplifier was described in this paper. This system can observe the damage of functional sub-circuits in an operational amplifer while measuring the response of its characteristics, furthermore the various influence of the damage of each functional sub-circuits on the degradation of the whole circuit can be investigated using this system.  
        关键词：Operational amplifier;Ionizing irradiation;Radiation damage;Measurement   
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        发布时间：2021-03-12
      • FAN Long,YAN Rongliang,ZHAN Guoqiang,YU Xuefeng,LU Wu,Guo Qi
        Issue 9, (2000)
        摘要：The long-term anneal behavior of the integrated dose records -threshold voltage of PMOS dosimeters at room temperature has been studied. The results showed that tunneling anneal of trapped holes in oxide and the buildup of interface states post-irradiation are two important mechanisms of the annealing. The bias conditions during irradiation and annealing affect the direction and magnitude of threshold shifts caused by room temperature annealing. The irradiation records can be maintained well at negative bias voltage.  
        关键词：PMOS dosimeters;Threshold voltage;Anneal   
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        发布时间：2021-03-12
      • ZHANG Daming
        Issue 9, (2000)
        摘要：Cover glass was used to measure the electron range and energy. The experimental study was done at Shanghai Standard Dosimetry Laboratory. Then the election bean energy of three industrial electron accelerators for radiation processing was measured. R.D.Evans equation was chosen among several empirical equations for the energy measurement. The results show a linear range-energy relationship that is applicable from 1 to 3MeV, with ± 10% accuracy.  
        关键词：Electron beam energy measurement;Range;Radiation processing   
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        发布时间：2021-03-12
      • WANG Xiuying
        Issue 9, (2000)
        摘要：Thin target covered with Pb film is widely used in the study of nucleus high spin states. The preparing method of Tb target was described in detail. The thin Tb target was obtained by rolling method and the Pb film was prepared by rolling or vacuum evaporation. The combination of Tb and Pb films was completed by means of rolling or vacuum evaporation. The target of Tb covered with Pb film obtained from this method is smooth, bright, tough and pinhole-free. It has been successfully used in the experiments.  
        关键词：Tb covered with Pb;Rolling;Vacuum evaporation   
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        发布时间：2021-03-12
      • YIN Jianhua
        Issue 9, (2000)
        摘要：The isotope 106Cd self-supporting targets for 32S+ 106Cd experiment have been prepared by rolling techique. Usable target films have been successfully prepared from the used broken targets.  
        关键词：Rolling technique;Self-supporting;Reproductive using   
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        发布时间：2021-03-12
      • WANG Guicheng,PEI Yuanji,LENG Yongbin,ZHAO Feng ZHOU Yuehua,GAO Yunfeng
        Issue 9, (2000)
        摘要：A new precise timing system was developed for single bunch injection in Hefei Light Source (HLS). The timing signal of timing system kept synchronous with the radio-frequency of storage ring and the take jitter was small. The experimental results also showed that the time jitter was less than 200ps for fast channel.  
        关键词：Single bunch injection;Timing system;Time-jitter   
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        发布时间：2021-03-12
      • ZHAO Minghua
        Issue 9, (2000)
        摘要：Traditionally negative feedback coming from output beam is used to stabilize output beam by regulating filament voltage of bombarding diode electron gun. We analysed the shortcomings of the method in detail and put forward a new method of regulating bombarding high voltage in NFZ-10 industrial irradiation linac. Output beam with high stability and high accuracy was obtained.  
        关键词：Industrial irradiation linac;Bombarding diode electron gun;High stability beam   
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        发布时间：2021-03-12
      • SU Yiyun
        Issue 9, (2000)
        摘要：According to the design requirement of the 3MeV/40mA high frequency, high voltage electron accelerator, the structure of its scanning magnet has been improved: A thermistor was installed on the wall of core tube and an air-colling machine was added. The measured beam characteristics from the Ti-window stopping plate showed that the design requirement has been fulfilled. The scanning frequency is 50 -200 cycles and the uniformity is better than 7%.  
        关键词：Scanning magnet;Pile pieces coefficient;Eddy current loss;Creep effect;Hot strength;Hot fatigue organization stability   
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        发布时间：2021-03-12
      • ZHANG Mingzu,NI Peihong,CAO Zhengbai,SHEN Naiqin
        Issue 9, (2000)
        摘要：Microcapsules(MC) containing amide extracts were prepared and UO22+ in aqueous solution was extracted with the microcapsules. The formation of emulsion and the third-phase could be avoided because the water phase was separated from the extracts and solvent encapsulated in the MC. The counter-extraction and repeating uses of MC were also researched.  
        关键词：Microcapsules;Amide;Extraction of uranyl;Counter-extraction   
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        发布时间：2021-03-12
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