最新刊期
      卷 0 ， 期 0 ， 2020
      • HOU Mingdong LIU Jie ZHANG Qingxiang LIU Gang
        Issue 1, (2002)
        摘要：The blistering and flaking behavior of many kinds of amorphous alloys under helium ion bombardment at room temperature has been investigated. Helium ions with energies of 40keV and 60keV were implanted to the dose range 1.0×10 18-4.0×10 18 ions/cm 2. The surface topography of samples after irradiation was observed by using a scanning electron microscope. The diameter of blister and the thickness of exfoliated blister lids were measured. The results showed that many kinds of surface topography characteristics appeared for different doses, energies and amorphous alloys, such as flaking, blistering, exfoliation, blister rupture, second-generation blistering and porous structure. The dependence of surface damage modes and the critical dose for onset of blistering and flaking on material sort and ion energy was discussed.  
        关键词：Blistering;Flaking;Helium ion implantation;Surface topogaphy;Amorphous alloy   
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        发布时间：2021-03-12
      • ZHANG Tianmei 1 DU Jinzhou 2 XU Shuwei 1 XIE Yuanxiang 1 LI Zhankui 1 1
        Issue 1, (2002)
        摘要：The nuclide 130 Ce was produced by a ( 16O,4n) reaction carried out at the SFC accelerator of IMP on an enriched 118 Sn target. Reaction products were moved to a shielded location by a He-jet tape-transport system, then using a radiochemical separation procedure in which a solvent extraction and precipitation with oxalic acid method was applied, Ce was separated, purified and made into thin sample rapidly, and then a single spectrum as well as X-γ, γ-γ coincidence measurements was performed . A 22.9min activity in chemical separated sample was identified as 130 Ce. The decay scheme was proposed for the first time. The scheme included 108 lines of γ rays, among which 107 being new. Total separation time of this new chemical procedure was about 10min, and the chemical yield was about 70%. More than 98% La produced in nuclear reaction was removed, decontamination of other impurities also satisfied the requirement of study of 130 Ce (EC+β +) decay scheme.  
        关键词：Ce(EC+β +) decay scheme;Extraction separation;Purification   
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        发布时间：2021-03-12
      • TANG Yuhua ZHU Zhiyong SUN Youmei LI Changlin JIN Yunfan
        Issue 1, (2002)
        摘要：Polystyrene films were irradiated with 3MeV silicon ions ranging from 1×10 12ions/cm 2 to 3×10 14ions/cm 2 at room temperature. Fourier-transform infrared spectra, reflection spectra and ultraviolet/visible transmission spectra were measured to investigate the radiation induced chemical modifications of the material. It was found that the material underwent significant degradation at fluences higher than 3×10 13ions/cm 2, corresponding to an average energy deposition of about 45MGy. Most of the functional groups including the phenyl ring were destroyed at high fluence. Simultaneously the energy gap of the material decreased with increasing fluence. At fluences of 1×10 14ions/cm 2 and 3×10 14ions/cm 2, the energy gap reduced from about 2.7eV to 1.85eV and 1.2eV, respectively. It is concluded that the irradiated film is transformed gradually into hydrogenated amorphous carbon at high fluence.  
        关键词：Polystyrene;Si implantation;Optical absorption;Chemical modification   
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        发布时间：2021-03-12
      • DU Guoping
        Issue 1, (2002)
        摘要：An intelligent instrument was developed for measuring direction and velocity of the groundwater, permeability coefficient, hydraulic transmitting coefficient, static level, hydraulic gradient and flow direction of each layer. This intstrument can be widely applied for detecting seepage of abutment and river bank, exploitation of grounwater, conservation of water and soil, water surging in mine, survey of groundwater resource and environment protection etc.  
        关键词：Direction of groundwater;Isotopoictracing;Isotope dilution   
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        发布时间：2021-03-12
      • ZHANG Tao HOU Junda
        Issue 1, (2002)
        摘要：TiN film was formed on iron substrate by Y ion beam dynamic enhanced deposition. The ratio of Y ions and Ti atoms arriving the film Y +:Ti=1:12. The film was characterized with AES, XRD and anode polarization analyses. A 50nm width of interlayer was formed between the film and the substrate. This process has an advantage over the non-IBED process in improving the corrosion resistance of TiN-iron sample.  
        关键词：Dynamic enhanced deposition;Metal ion beam;Surface modification   
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        发布时间：2021-03-12
      • LI Weimin ZHOU Anqi LI Yongjun LI Jingyi LIU Gongfa DIAO Chaozheng YU Xiangkun DAI Yiming PEI Yuanji
        Issue 1, (2002)
        摘要：The structure and principle of a RFKO system was described in this paper. It excited the beam to produce resonant oscillations of electrons in bunches, which were then knocked out, resulting in partial filling and non-uniform filling in the ring. We observed a transverse multi-bunch instability, which could be cured by partial filling. The experimental results of the system were presented.  
        关键词：RFKO;Partial filling;Multi-bunch   
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        发布时间：2021-03-12
      • LUO Xiaobing CAO Jianhua AN Zhu CAO Yangshu WANG Fangting PENG Xiufeng HE Fuqing MIAO Jingwei
        Issue 1, (2002)
        摘要：The wheat seeds with higher protein content can be distinguished by their 14N/ 12C ratios determined by (d,p) reactions induced by 13.4MeV deuterons.  
        关键词：Nuclear reaction;Protein;Nitrogen   
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        发布时间：2021-03-12
      • SUN Zhiguo ZHANG Quanrong HE Xiangming YAN Yushun
        Issue 1, (2002)
        摘要：The chemical etching techniques of polypropylene (PP) nuclear track membrane were studied. The effects of potassium dichromate concentration, sulfuric acid concentration, etching temperature and etching time on the bulk etching rate of PP nuclear track membrane were discussed. A mathematical relation has been established. Under certain etching conditions, the expected PP nuclear track membranes were made by etching the irradiated PP membrane, affirming the mathematical relation.  
        关键词：Nuclear track membrane;Polypropylene;Bulk etching rate   
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        发布时间：2021-03-12
      • WANG Guicheng LENG Yongbin SUN Baogen TAO Xiaoping HE Xiaoye ZHAO Feng ZHOU Yaohua
        Issue 1, (2002)
        摘要：The film-mode resistor used for the wall-current monitor with the carrier of PET usually broke-down under the strong radiation in about a half year in the LINAC tunnel of NSRL. A survey of the reason was made and a new type film-mode resistor with ceramic carrier was developed. It’s lifetime can be expected to be a few years in the LINAC tunnel of NSRL.  
        关键词：Strong radiation;Film-mode resistor;Analysis of structure;Ceramic carrier   
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        发布时间：2021-03-12
      • LIU Gongfa LI Jingyi LI Weimin
        Issue 1, (2002)
        摘要：Upgrade of the NSRL transport line power supply control system was implemented via EPICS. The hardware structure, software designs and test of the supply control system were described.  
        关键词：EPICS control system;IPC   
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        发布时间：2021-03-12
      • ZHANG Zhulin
        Issue 1, (2002)
        摘要：For Lindhard scaling interaction potential scattering commonly used in sputtering theory, we analyzed the great difference between Sigmund’s single power and the double power cross sections calculated in this article. The double power cross sections can give a much better approximation to the Born-Mayer scattering in the low energy region (m~0.1). In particular, to solve the transport equations by K r-C potential interaction given by Urbassek few years ago, only the double power cross sections (m~0.1) can yield better approximate results for the number of recoils. Therefore, the Sigmund’s single power cross section might be replaced by the double power cross sections in low energy collision cascade theory.  
        关键词：Sputtering;Scattering cross section;Collision cascade   
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        发布时间：2021-03-12
      • ZHOU Zhentang QIAN Guojun LIN Fenzhi ZHUANG Daoling ZHANG Yulong HE Zhanjun
        Issue 1, (2002)
        摘要：C-lidocaine was composed by 14 C-diethylamine reaction with ω-chloroacetic-2,6-dimethylaniline. 14 C-diethylamine was prepared from Ba 14 CO 3 via K 14CN and 14 C-acetenitrile which was hydrogenated. Radiochemical purity of 14 C-diethylamine and 14 C-lidocaine is >99% by HPLC and TLC respectively. 14 C-lidocaine is needed for breath assay of mouse for measuring liver function.  
        关键词：Lidocaine;Radiocarbon;Labeled compounds   
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        发布时间：2021-03-12
      • XIANG Qun BAO Borong CAO Weiguo
        Issue 1, (2002)
        摘要：N-octanoyl-2-methylpiperdine (OMPPD), a new kind of extractant has been synthesized for the purpose of further studying the extracting capability of the cyclic secondary amine and improving the extracting theory of the interrelations between the structure and the performance of the extractants. It has also been checked by elemental analysis, IR and mass spectra. The extraction of uranium (Ⅵ) in nitric acid has been studied. The species extracted is UO 2(NO 3) 2(OMPPD) 2.  
        关键词：OMPPD synthesis;Extraction of Uranium (Ⅵ)   
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        发布时间：2021-03-12
      • ZHANG Tao 1,2 ZHANG Huixing 1 ZHU Jianhao 2 Brown I G 3 1
        Issue 1, (2002)
        摘要：A special curved magnetic filter was developed to investigate the effect of different bias mode on the transport of cathode arc plasma through the curved magnetic filter. The relation between the ion output of the filter and the cathode arc current was determined. Each part of the wall inside the duct interacted with the plasma independently. Two kinds of ion flux onto the duct wall were presented and they played different roles when cathode arc current changed. It was found that whole duct bias was more effective in plasma transport through the filter than the Bilek plate bias, although the Bilek plate (or the outer-wall inside the duct) contributed most part of ion output of curved magnetic filter when they were positively biased.  
        关键词：Cathodic arc plasma source;Magnetic filter;Plasma transport   
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        发布时间：2021-03-12
      • HUANG Wei FU Yibei XU Yunshu
        Issue 1, (2002)
        摘要：The polymer degradation induced by X-ray, neutron, electron beam and γ ray radiation was reviewed. Several factors affecting the degradation were discussed. Two methods for accelerating radiation aging were expounded. Difficulties were faced in the research of polymer degradation and their development prospects were also discussed.  
        关键词：Polymer;Radiation degradation;Accelerated age   
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        发布时间：2021-03-12
      • LI Qiang WEI Zengquan
        Issue 1, (2002)
        摘要：Radioactive ion beams with different decay modes and half-lives can be applied in many aspects of bio-medical fields. Bio-medical application researches of radioactive ion beams around the world, since the first high energy radioactive ion beam was generated at LBL in the middle of 1970’s were reviewed. Moreover, new innovative research motivations with radioactive ion beams in bio-medical applications at the facilities of RIBLL and the future HIRFL-CSR were proposed.  
        关键词：Radioactive ion beam;Heavy ion beam;Medicine;Biology;Application   
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        发布时间：2021-03-12
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