最新刊期
      卷 0 ， 期 0 ， 2020
      • Issue 10, (1996)
        摘要：Neutron flux in fuel elements at different positions can be measured by solid state nuclear track detectors,and neutron flux in the moderator at the same position can be obtained by the activation method.An empirical formula ΦU（r）/ΦU≈ΦM（r）/ΦM is verified and the conditions under which the formula can be used are given.  
        关键词：Solid state nuclear track detector（SSNTD）;Neutron flux   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：The theory of thermal neutron measurement using CR-39 SSNTD is described.The method of making thermal neutron CR-39 SSNTD and its preliminary application for personal dose monitoring are introduced.  
        关键词：Thermal neutron;CR-39 SSNTD;Personal neutron dosimeter   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：Some basic properties of the home-made SY-2 CR-39 and American CR-39 NTD,such as surface track density-etching time relationship, maximum allowable track density per unit mass and saturated surface density, have been studied with an Am-Be neutron source,and their character istics are found to be similar.  
        关键词：Nuclear track detectors;Fast neutron detection   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：Described are various properties of uranium standard glass made in China used for fission track calibration.The content of uranium in the uranium glass has been determined and the impurity elements analyzed accurately.The response of induced fission tracks of the uranium glass is tested.  
        关键词：Fission tracks;Uranium standard glass;Calibration   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：The dependences of neutron yield on incident energy and atomic mass of the target have been studied by bombardment of 44GeV or 18GeV 12C ions with Cu or Phtargets. The CR-39 stacks are used to detect fast neutrons. The neutron yield ratios obtained for 44GeV and 18GeV are 2.12± 0.19（Cu target） and 2.04±0.15（Pb target）.The neutron yield ratios obtained for Ph and Cu target are 2.54±0.20（44GeV） and 2.56 ± 0.20（18GeV）, showing that Pb target produces more neutrons than Cu target in the same conditions.  
        关键词：?12)C ions;Neutron yield;Incident energy dependence;Target mass dependence   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：Fast neutrons produced in 44GeV 12C+Cu interactions have been measured and analysed with nuclear emulsion. The neutron spectra were obtained by measuring the recoil protons in emulsion and the track parameters of a particles from interactions of 12C（n, n’）3 α in emulsion.The experimental neutron spectrum was compared with those by Monte-Carlo calculations.  
        关键词：Neutron spectra;Nuclear reactions;Nuclear emulsion   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：Properties of Type HI nuclear track membranes （NTM）, and the applications in clinical practice are described. As a part of the infusion set the NTM has been successfully used in intravenous infusion for the filtration of dust granules, tiny fibres, germs, etc. The effect of an NTM filter is much better than that of other filters. The use of NTM for the purpose of plasma separation and therapy of wounds and burns are briefly introduced.  
        关键词：Nuclear track membranes;Filter;Clinical practice;Infusion   
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        发布时间：2021-04-09
      • Wang Shicheng
        Issue 10, (1996)
        摘要：The present status and latest progress of fission track thermochronology are introduced and some research results in our laboratory are described in this paper.  
        关键词：Fission track;Apatite;Geological thermal history;Oil and gas exploration   
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        发布时间：2021-04-09
      • Huang Rongqing
        Issue 10, (1996)
        摘要：The intensities and distributions of the cosmic ray heavy nuclei have been measured by the plastic nuclear track detectors at the microbe culture equipment aboard a recoverable satellite launched in July 1994. The integral intensity of the particlea with Z/β larger than 10 is （6.72± 0.41）×10-2 （m-2·s-1·sr-1） inside the equipment. It is found that the particles with Z/β larger than 10 not only enter randomly, but also distribute inhomogeneously inside the satellite.  
        关键词：Space;Cosmic ray;Heavy nuclei;Plastic nuclear track detectors   
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        发布时间：2021-04-09
      • Guo Shilun
        Issue 10, (1996)
        摘要：Recent advances in the study of nuclear tracks in solids are reviewed,including track formation mechanisms,track observation techniques and applications to nuclear Physics,high energy and relativistic heavy ion interactions, atomic physics,space science, cosmic rays, geoscience, radon monitoring and track membranes.  
        关键词：Nuclear tracks in solids;Advances;Applications;Track formation mechanisms;Track observation techniques   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：The age and thermal history of the strata containing dinosaurus fossile in Tianzhen County of Shanxi Province have been studied using apatite and zircon fission track analysis.It is shown that the burial age of dinosaurus skeletons is not earlier than Late Cretaceous.The provenance area of the strata had experienced heating events with temperature higher than 200-250℃ 73Ma ago. But the strata has been at environmental temperature and never been affected by heating events since the dinosaurus skeletons were buried.  
        关键词：Apatite;Zircon;Fission track;Dinosaurus extinction;Thermal history   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：In this paper, a brief introduction of the irradiation equipment of HIRFL（Heavy Ion Research Facility in Lanzhou） is Presented. Some research projects on the radiation effect of swift heavy ions based on this equipment are proposed.  
        关键词：Irradiation equipment;Radiation effect;Swift heavy ions   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：The fission track method has been used to determine the ages of the penecontemporary and secondary gypsums in the red beds of the sections at Wangjiashan and Dongxiang in the Linxia Basin. The ages ranging from 6.79 to 21.39Ma indicate that the starting age of the Cenozoic red beds is the early Miocene.  
        关键词：Linxia Basin;Gypsum;Fission track dating   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：The topography and size of the damaged area on the surface of HOPG bombarded by An ions and H+are studied.The correlation between the number density and ion lose is also given.The possible process of damage is discussed.  
        关键词：Latent track;Mica;HOPG;STM;AFM   
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        发布时间：2021-04-09
      • Zhang Donghai
        Issue 10, (1996)
        摘要：The intermittency in interactions of 3.7 A GeV oxygen with nuclear emulsion has been studied by using the method of scaled factorial moments. It is found that in the pseudorapidity region from 1 to 0.1,the moments increase with decrease of pseudorapidity, the data exhibit the intermittent behaviour, and the intermittent indexes decrease with increase of the incident energy.  
        关键词：ntermittent behaviour;Scaled factorial moment;Nuclear emulsion   
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        发布时间：2021-04-09
      • Zhai Pengji
        Issue 10, (1996)
        摘要：In this paper several age standards （including three zircon, two apatite and one sphene） have been used for Zeta determination against SRM612. No significant difference of three minerals is found. A single-weighted mean Zeta constant is given as 339.2±6.6（2σ）.The thermal neutron flux calculated from σ Φ is compared with that determined from Co foil. The ages of zircon and apatite are determined using the calibrated constant b and the track density by a dosimeter glass. The results of 27.7±0.8Ma for FCT,16.1±0.5Ma for MB, 60.0±3.0Ma for TR and 30.8± 1.9Ma for Durango are consistent with the reference ages within the range of error.  
        关键词：Fission track dating;Zeta value;Age standards   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：Introduced are the hardware and main functions of the software for a set of full automatic solid nuclear track measuring system using the image analysis technique.Various tests have been made and some applications are presented. Some characteristics of the system,such as the track measuring accuracy,reproducibility and speed of measurement are discussed.  
        关键词：Solid nuclear tracks;Full automatic measuring system;Image analysis   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：New developments of the intelligent track membranes are introduced.The present status and future technical prospect are reviewed.  
        关键词：Intelligent track membrane;Nuclear track;Polymer;Grafting   
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        发布时间：2021-04-09
      • Issue 10, (1996)
        摘要：An etching image recognition system of nuclear tracks is introduced. Widely used in radiation hygiene,environmental radon monitoring and some other fields, the system is stable,reliable,repeatable and can be used easily.Due to the superiority to a microscope,the system is suitable for a large scale measurement of track density.  
        关键词：Radiation measurement;Dielectric track detectors;Image process   
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        发布时间：2021-04-09
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