最新刊期
      卷 0 ， 期 0 ， 2020
      • Issue 7, (1999)
        摘要：Latent track formation is one of the important effects induced by swift heavyions in condensed matter. An overview on electronic stopping threshold for trackformation, damage cross section and track morphology was given in this paper.  
        关键词：Electronic excitation;Latent track;Damage defect   
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        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：Using N-isopropylacryl-amide (NIPAAm) thermo-sensitive function material asmonomer and nuclear track microporous membrane (NTMM) as baseline material, athermo-senstitive intelligent track membrane (TsITM) has been prepared by theover-oxidization and pre-irradiation grafting techniques. The TsITM can be used tomake a micro-switch controled by temperature and to adjust particle screening andosmosis. To obtain sul--micron responsive grafted track pores only a very thinthermo--sensitive layer is needed. The TsITM pores are capable of swelling andshrinking rapidly and respond more sensitively to temperature.  
        关键词：Dielectric track detectors;Nuclear track microporous membrane;Grafting;Intelligent track membrane   
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        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：In this paper three sets of new nuclear emulsion techniques are introduced.These techniques can be performed fast, accurately, semi-automatically or fullautomatically and are very suitable for measuring emission angles of chargedparticles in central events for ultra-high energy heavy-ion collisions.  
        关键词：Nuclear emulsion measurement;Heavy-ion collision;Multiplicity   
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        <引用本文> <批量引用> 7199634 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The mean multiplicity, multiplicity distributions and polar angular distributionsof the grey particles in (14.6, 60 and 200GeV/u) O+Em and (200GeV/u) Si+Em,(200GeV/u) S+Em reactions have been systematically studied. And the experimentalresult is compared with Monte Carlo simulation based on the LUCIAE model.  
        关键词：High energy heavy-ion;Nuclear reaction;Grey particle   
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        <引用本文> <批量引用> 7201314 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：Studies on high energy heavy ions Ar and C demonstrate that: (1)Bubbledetectors can be used to detect high energy heavy ion tracks. Each track is composedof a line of bubbles along the trajectory of the heavy ion; (2) Bubble detctor is a typeof threshold detector for heavy ions. The essence of the threshold is approximatelycritical energy loss rate (dE/dX)c, which is similar to that of track detectors. For ourbubble detectors it is 2220MeV/g cm2. The bubble detectors can be used in heavyion physics, cosmic ray physics, cold dark matter detection and cancer therapysimulation.  
        关键词：Bubble detector;High energy heavy ion tracks;Threshold essence   
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        <引用本文> <批量引用> 7199689 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The theoretical calculations and Monte-Carlo Simulatiuons of the relationshipbetween the measured distributions of fission track length and the parameters ofheavy ion tracks have been carried out. It is shown that the measured distributions offission track length are strongly dependent on the parameters of heavy ion trackswhich are used as the passage for etching out the latent tracks of 238U fissionfragments.  
        关键词：Heavy ion tracks;Fission track length;Probability   
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        <引用本文> <批量引用> 7199810 false
        发布时间：2021-03-12
      • LI Yiguo SHI Yongqian
        Issue 7, (1999)
        摘要：This paper describes the principle, experimental method and result of themeasurement of fast neutron fission factor by means of a solid state nuclear trackdetector. A comparison between the experimental and theoretical results shows theywere in reasonable agreement.  
        关键词：Solid state nuclear track detector;Fast neutron fission factor   
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        <引用本文> <批量引用> 7199711 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The etching characteristics of the tracks of high dose alpha particles and protonsin domestic CR-39 detector were studied. By testing the environmental backgroundof the target chamber during the irradiation, it is shown that the ions recorded atarea so far as 40mm from beam spot are same to those at beam spot and that it isdifficult to identify etched tracks due to heavy overlap of tracks induced by high doseirradiation. However the other experiment indicates that the recording ionscharacteristic at etched area of high dose not change. The variation of the averageetch pit diameter in CR-39 as a funtion of the energy of alpha particles and protonswas given.  
        关键词：CR-39;Proton;Alpha;Etch curve   
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        <引用本文> <批量引用> 7199520 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The mineralization temperature of the Xiayingfang gold deposit in Hebei is 370-290℃, 230-170℃ and 150-80℃ in vanward-, main- and late-mineralization periodrespectively. Fission track ages of the zircon and apatite from the quartzsericitization zone of the gold district are 153.9Ma and 103.3Ma, respectively. Theages fall into major mineralization. time, and the metallogenetic period is more than50Ma. It is shown that fission track analysis of the minerals is useful to researchingthe metallogenetic epoch of hydrothermal deposits.  
        关键词：Metallogenetic epoch;Fission track;Hydrothermal deposit;Gold deposit;Nuclear analysis   
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        <引用本文> <批量引用> 7199824 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The features and the formation mechanism of the individual damage induced bythe energetic ions with a wide energy range from MeV to GeV were studiedsystematically. Scanning Tunneling Microscope (STM)/Scanning Force Microscope(SFM) with atomic resolution were used to observe and measure the feature and thesize of the damage in conductor and insulator, and also the relationship with theenergy deposition of incident ions in solids. In this work, the theory of two--bodycollision, thermal spike model and electronic excitation model were used to calculateand analyze the experimental results. It was found that these theoretical calculationsfitted well with the experimental data.  
        关键词：Ion bombardment;Individual damage;STM/SFM   
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        <引用本文> <批量引用> 7199588 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The solid state nuclear track parameter has been measured by using the imageanalysis technique. The hardware system of the image analysis equipment is brieflyintroduced and the method of measuring the solid state nuclear track parameter isdescribed in detail. A statistical analysis of the experimental results is given.  
        关键词：Solid state nuclear track;Parameter measurement;Image analysis   
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        <引用本文> <批量引用> 7199493 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：A new inverse method for geothermal history calculation has been suggested.Differing from other methods this one can give an unique solution. The results of thenew inverse method are consistent with those of smoke convection model. Bothinverse models are proved to be correct by forward modeling calculation.  
        关键词：Fission track length;Geothermal history;Inverse modeling;Forwardmodeling;Smoke convection method   
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        <引用本文> <批量引用> 7199474 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：The CR-39 nuclear track detector was calibrated with 50MeV/u 12C ions. Thetentaltive fitting curve can be expressed by a formula of VT equal to C’ LETS.u,,where the slop C a-nd the exponent a are 0.0083[(μm/keV)1.4865·μm/h] and 1.4865respectively.  
        关键词：Solid state nuclear track detector;CR-39;Calibration test;Etching rate   
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        <引用本文> <批量引用> 7199565 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：A conception and method of space breeding mechanism study with solid statenuclear track detector is briefly introduced. The detector system, etching conditionsand measured parameters are described. The methodology of particle identification isdiscussed. Finally, dependence of variation observed in the field on hitting particlesis analysed.  
        关键词：Solid state nuclear track detector;Space breeding;Particle identification   
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        <引用本文> <批量引用> 7201932 false
        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：A method of discriminating radon from thoron by using an absorber has beendeveloped. This discriminating method realizes direct passive and integrating thoronmonitoring, but reduces thoron measurement sensitivity. By means of usingelectrostatic collection inside the sampling chamber, the sentivity can be increasedlargely.  
        关键词：Radon;Thoron;Discrimination;Absorber;Passive and integratingmeasurement   
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        发布时间：2021-03-12
      • HUANG Rongqing
        Issue 7, (1999)
        摘要：esign features of balloon borne "Biostack" experiments for the study of theradiobiologycal effects by relatistic heavy nuclei in cosmic ray are described. Thepreliminary results obtained in two balloon flights are presented.  
        关键词：Plastic nuclear track detector;Cosmic ray;Heavy nuclei radiobiological effects   
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        发布时间：2021-03-12
      • Issue 7, (1999)
        摘要：This paper introduces a new practical air-seeping and germ-prevention packingContainer made with a combination of the 0.1-0.5μm borediameter nuclear trackmicrohole membrance (NTMM) and the PE food wrapper or other poisonousless PEcontainers of different shapes. It can be applied in the field of food preservation,especially for storage of fresh fruits through irradiation, to achieve breathing withoxygen, and thus to prolong the storage duration.  
        关键词：NTMM;PE containers;Air-seeping and germ-prevention;Preservation by irrdiation   
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        发布时间：2021-03-12
      • CHAI Zhifang
        Issue 7, (1999)
        摘要：The features, developing trends and some frontier topics of nuclear analysistechniques and their applications in environmental science were reviewed in thispaper, including the study of chemical speciation and environmental toxicology,microanalysis and identification of atmospheric particle, nuclear analysismethodology with high accuracy and quality assurance of enviromental monitoring,super-sensitive nuclear analysis method and addiction of toxicant with DNA,environmental specimen banking at nuclear analysis centre and biologicalenvironmental monitor, etc.  
        关键词：Nuclear analysis;Environmental science   
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        发布时间：2021-03-12
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