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      • Zhangsu Li
        Vol. 11, Issue 8, (1988)
        摘要：This paper describes the development of isotope hydrology technology in China. The isotope technology provides an independent approach for solving hydrological problems. Isotope hydrology is applied in three ways: the use of change in environmental isotopic composition of water (especially used in water resources exploitation), the use of artificial radioactive tracers and the use of radioisotope instruments. Many important achievements have been obtained in application of isotopic hydrology technology. For the sake of promoting rapid development of isotope hydrology the topics on management, technology and others are commented.  
        关键词：isotope hydrology technology;artificial radioactive;tracer techniques;environmental isotope techniques;radioisotope instruments;unsafe reservoir;global meteoric water line   
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        发布时间：2022-08-16
      • Guoan Cheng,Baixin Liu,Jinsheng Pan,Hengde Li
        Vol. 11, Issue 8, (1988)
        摘要：A study of ion mixing of the multilayered samples with various alloy composition in binary metal systems of Ti-Al and Fe-Al was carried out by means of the transmission electron microscope, Rutherford backscattering analysis and the sheet electrical resistivity measurement. The experimental results showed that the Ti-Al amorphous phases had been formed in wide alloy composition range by 100 keV Ar ion mixing, while the Fe-Al amorphous phase had been formed only in an alloy composition around Fe25Al75 under similar conditions. The experimental results are discussed in connection with the current predictions.  
        关键词：Ion mixing;Amorphous alloy   
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        发布时间：2022-08-16
      • Chenglu Lin,Anmin Guan,Haiyang Geng
        Vol. 11, Issue 8, (1988)
        摘要：As+ and BF2+ were implanted in Si with energies ranging from 5 to 20 keV and doses ranging from 5×1014/cm2 to 5×1015/cm2. Rapid thermal annealing(RTA) is used to activate implants and control their diffusive redistribution. Our results indicate that abrupt n+-p and p+-n junctions as shallow as 100nm can be produced with corresponding sheet resistances as low as 60Ω/口.  
        关键词：ultra-shallow junction;Low energy ion implantation;rapid thermal annealing   
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        发布时间：2022-08-16
      • Zhe Li,Zhenfu Zhang
        Vol. 11, Issue 8, (1988)
        摘要：Mössbauer spectroscopy is applied for the study of melted agglomerant of low temperature ash for Datong coal. The results show that hematite and glasses containing Fe3+ are the major iron containing phases in the melted agglomerant obtained in oxidizing atmospheres. Hematite is transformed to glass phase with increasing temperature. Magnetite, pyrrhotite, Fe2+-containing glass, olivine and spinel are the main iron-containing phases in the melted agglomerant obtained in reducing atmospheres. Olivine is transformed to glass phase with increasing temperature. Compared with the result of low temperature ash of coke, it is indicated that coal gasification is accompanied by coking process.  
        关键词：Mossbauer effect;low temperature ash;melted agglomerant;oxidizing atmosphere;reducing atmosphere   
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        发布时间：2022-08-16
      • Yuelie Lu,Manwei Zhang,Jianxian Song,Huilin Jiang
        Vol. 11, Issue 8, (1988)
        摘要：Using a one-dimensional positron annihilation angular correlation spectrometer (FWHM=0.33mrad) and a positron lifetime spectrometer (FWHM=0.305ns), we have performed the measurements on the angular correlation and positron lifetime spectrum of the gamma rays produced by positron annihilation in a series of vinyl tetrafluoride-propenyl hexafluoride copolymers (F46) and a series of polyethylene containing different amount of chlorine. The results are Compared with those for PTFE and PE respectively.  
        关键词：Positronium;Positron annihilation;one-dimentioned angular correlation;spectrum of positron annihilation;polytetrafluoroethylene;Polyethylene   
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        发布时间：2022-08-16
      • Wenxiu Su,Liupei Wang,Songlin Lu
        Vol. 11, Issue 8, (1988)
        摘要：A β-gauge using silicon surface barrier semiconductor detector is described. It has one 14C source and two detectors, one of which is for thickness measurement and the other is for compensating the density change of air. The β-gauge, mounted on a capacitor paper production line, is suitable for on-line test of 8-18 g/m2 paper with a sensitivity about 0.15 g/m2.15000 hours on-line operation has shown that the β-gauge's stability and reliability are satisfactory.  
        关键词：β-gauge;thickness of capacitor paper;On-line measurement   
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        发布时间：2022-08-16
      • Ningkang Huang,Minghua Wang,Yong Shen,Xianen Wang,Huacong Guo
        Vol. 11, Issue 8, (1988)
        摘要：Described is an equipment consisting of several systems as follows: an ion system, having a sputtering ion source and an asymmetric three electrode acceleration tube, operated at 50 keV with a beam current up to 4 mA (for N+) ; an electron beam system operated at up to 45 keV with beam power densities of 102-106W/cm2; a microcomputer device for electron beam deflecting; a magnetron sputtering device capable of easily altering the targ materials and a large high vacuum work chamber (500×1600 mm) with rotary, translation and up-down mechanical scannings, A variety of surface treating (ion implantation, ion mixing, electron beam glazing and alloying, magnetron sputtering ion plating etc.) can be made with this equipment. Several experiments have proved that this equipment is versatile for materials, surface modification and preparation of solid films.  
        关键词：Ion implantation;Magnetron sputtering deposition;electron beam coating   
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        发布时间：2022-08-16
      • Hongyuan Su,Bangfa Ni
        Vol. 11, Issue 8, (1988)
        摘要：25 elements (As, Ba, Ce, Co, Cr, Cs, Dy, Eu, Fe, Hf, K, La, Lu, Mn, Na, Nd, Rb, Sc, Sm, Ta, Tb, Th, U, Yb, and Zn) in Tibet soil-Chinese environmental SRM have been determined by the relative method and the monocomparator K0 method of INAA. Uranium was also determined with the delayed neutron counting method. All the results in this work are consistent well with the certificated values. The SRMs 1633a, USGS-GXR-4 and GSD-3 have also been analyzed for examining.  
        关键词：environmental SRM;Tibet soil;INAA;K0 method   
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        发布时间：2022-08-16
      • Zujiang Liu
        Vol. 11, Issue 8, (1988)
        摘要：An iridium—192 gamma-ray equipment was applied to the inspection for the simulated main loop pipes of a nuclear power plant. The measures taken to obtain the optimum technological parameters were described. It is indicated that the radiographic inspection can be widely used in industry.  
        关键词：gamma-ray radiographic inspection;Nuclear power plant;main loop;radiographic sensitivity;optimum density   
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        发布时间：2022-08-16
      • Yuzhu Liu
        Vol. 11, Issue 8, (1988)
        摘要：The effects of flow rate, weight of absorbent, absorbing time and number of times on absorption efficiency of 60Co from water by 8-hydroxyquinoline-activated carbon [Ac(HOX)] were studied. A simple and effective method for purifying 60Co contaminated source-well water were proposed. The concentration of 60Co could be decreased by two orders of magitude, after 10h absorbing processing of 20m3 well water with 541 Ac(HOX) at flow rate of 10m3/h.  
        关键词：source-well water;60Co;contamination;8-hydroxyquinoline-activated carbon;Absorption;Purification   
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        发布时间：2022-08-16
      • Rendao Wang,Wenjie Song,Hailin Du,Xiuying Gao,Guifen Jiang,Xuebing Chen,Lianfang Zhu
        Vol. 11, Issue 8, (1988)
        摘要：Four environmental radiation monitoring stations in our institute and their performance were described. Some typical data including environmental background were presented. An example showing the change in environmental neutron and gamma radiation during the operation of a 600kV Cockcroft-Walton was given. The data were compared with that elsewhere.  
        关键词：environmental radiation monitoring station;Background;collector   
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        发布时间：2022-08-16
      • Hesheng Shao,Shangren Pan,Xinan Jing,Weiyi Li,Lanqin Yin,Yingying Feng
        Vol. 11, Issue 8, (1988)
        摘要：This paper reported the results of skin absorption and distribution of unguent and solution of [2-14C] carbendazol (MBC) in rats by using radioactive tracer and autoradiography. It was concluded as: 1) the percentage permeated into skin for unguent was 5.7%, while for solution 9.8%; 2) permeability constant for unguent was 1.86×10-6 cm/h, while for solution 29.3×10-6 cm/h; 3) carbendazol remained mainly in stratum corneum.  
        关键词：[2-14C] carbendazol;skin absorption;tissue distribution;Autoradiography;unguent;solution;rats   
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        发布时间：2022-08-16
      • Lianxiang Chen,Qingling Zhang,Xinhui Wang
        Vol. 11, Issue 8, (1988)
        摘要：We have developed a multi-probe system with which regional cerebral blood flow(rCBF) can be measured by the 133Xe inhalation method. The system can automatically analyze data as well as determine grey and white flow and their distribution. The computer-controlled instrument comprises a 133Xe delivery unit, a data acquisition and analysis system, a helmet probe holder and 30 head probes. In this paper, the hardware construction and the features of the system are presented. The algorithm for cerebral blood flow analysis is also discussed.  
        关键词：rCBF system;133Xe;isotope clearance;Data acquisition   
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        发布时间：2022-08-16
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