最新刊期
      卷 0 ， 期 0 ， 2020
      • Shilun Guo
        Vol. 11, Issue 9, (1988)
        摘要：This paper describes the main progress of solid state nuclear track detectors in recent years which includes descovery of α-reaction tracks in mica, synthesis of CR-39—SO2, bubble damage detetors, and new progress in applications of track detectors in some fields.  
        关键词：solid state nuclear track detector;new progress   
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        发布时间：2022-08-16
      • Deling Pang,Guocai Ma
        Vol. 11, Issue 9, (1988)
        摘要：The method is reported of preparing a new CR-39 nuclear track detector, polymerized from the liquid monomer allyl diglycol carbonate (ADC) and the initiator bengoyl peroxide (BPO). It is shown that bulk etch rate VB=1.37µm/h, relative sensitivity Vα/VB= 1.77, and background track density B=9.8×10-3 track/mm2. The merits of this CR-39 detector are low cost, low background track density and good sensitivity, uniformity and stability.  
        关键词：CR-39 SSNTD;Preparation;etching property   
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        发布时间：2022-08-16
      • Rongqing Huang
        Vol. 11, Issue 9, (1988)
        摘要：A method of exposing the CR-39 plastic detector to cosmic ray heavy nuclei to determine its performance is presented. According to the ratio V=VT/Vg of cosmic ray heavy nuclei tracks the sensitivity, homogeneity and consistency for the China-made CR-39 detector have been tested.  
        关键词：cosmic ray heavy nuclei;CR-39 track detector;Sensitivity;Homogeneity;Consistency   
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        发布时间：2022-08-16
      • Risheng Wu,Huanhua Cui
        Vol. 11, Issue 9, (1988)
        摘要：Effects of the concentration of polycarbonate Cpc (domestic) and Lexan (Lpc) etching products in NaOH solution on bulk etch rate (Vg) and relative sensitivity (VT/Vg)were studied at 60 and 70℃ and in the solution of 6 and 7 mol/1 NaOH. It is shown that the bulk etch rate (Vg) for Lpc and Cpe increases with increasing concentration of the etching products in NaOH solution. After the concentration of etching products reaches a certain value, the bulk etch rate reaches a maximum and remains unchanged. The relative sensitivity VT/Vg is found to be independent of etching product concentration.  
        关键词：etching product;bulk etch rate;relative sensitivity   
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        发布时间：2022-08-16
      • Jian Zhou,Huanhua Cui
        Vol. 11, Issue 9, (1988)
        摘要：The effect of sunlight and roomlight on the sensitivity of PCTD has been studied using 252Cf fragments, Results show that the sensitivity of PCTD irradiated by sunlight and roomlight increases significantly. With intensity, sunlight has much more effect on sensitivity than roomlight during the same irradiation time. Sensitivity increases slowly even in darkness.  
        关键词：solid state track detector;Sensitivity;photo-oxidation reaction   
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        发布时间：2022-08-16
      • Quanrong Zhang,Shouzhong Wang,Yushun Yan
        Vol. 11, Issue 9, (1988)
        摘要：The etching rate of PET film in NaOH solution was studied in order to prepare track -etched membranes (nuclepore) with proper pore diameter. Under different temperatures and NaOH concentration the bulk etching rate for PET film was determined and an empirical formula was obtained. To increase the etching rate along the tracks some effective methods are suggested.  
        关键词：nuclepore membrane   
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        发布时间：2022-08-16
      • Xiuhong Hao,Shilun Guo
        Vol. 11, Issue 9, (1988)
        摘要：The bulk etching behavior of makrofol KG film has been studied. It is shown that the bulk etching rate as a function of etching temperature can be described by Arrhenius equation Vb=ae-E/KT. The activation energy for bulk etching is E=0.66±0.02eV. The relation of the bulk etching rate to the concentration of etchant is Vb=anb, where b=2.02 for 1 to 10 mol/l NaOH.  
        关键词：makrofol;KG;bulk etching;rate;etching temperature;Arrheuius equation   
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        发布时间：2022-08-16
      • Ruiying Hu,Thiel K.
        Vol. 11, Issue 9, (1988)
        摘要：The U—content and the U-microdistribution were studied by means of fission tracks. The pure muscovite sheets, "Lexan" polycarbonate foils and ultrapure quartz glass were used as external track detectors. U-enriched mineral phases were localized with accuracy of better than 1µm by applying a photographic mapping technique. Identification and elelmental analysis were carried out using an electron microprobe.  
        关键词：Fission tracks;standard glass;external detector   
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        发布时间：2022-08-16
      • Xinlu Deng,Guobing Zhang,Liansheng Zhang
        Vol. 11, Issue 9, (1988)
        摘要：A microcomputer-assisted discharge counter for counting and analyzing fission tracks is described. It is used for measuring uranium content in some tap-water samples by the fission track method. The result obtained by the discharge counter is compared with that obtained by a microscope.  
        关键词：Fission track;discharge counter;content of uranium   
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        发布时间：2022-08-16
      • Huanhua Cui,Risheng Wu
        Vol. 11, Issue 9, (1988)
        摘要：The polycarbonate nuclear track microfilter was studied. The pore structure pore size distribution, overlap of pores, flow rate, chemical resistance heat resistance, radioactivity and tensile strength of the microfilters were measured. These properties of the microfilter are quite comparable to that of Nuclepore corporation in USA. The microfilter has been applied to the clarification of ultra pure chemical reagents and the study of deformability of red blood cells.  
        关键词：nuclear track microfilter   
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        发布时间：2022-08-16
      • Huanhua Cui,Yongheng Zhang,Jing Chen,Lin Jiang
        Vol. 11, Issue 9, (1988)
        摘要：A pilot study of the microfilter to clarify three kinds of chemical reagents(hydrogen pcroxide, hydrochloric acid and a negative photoresist for developer) was carried out. They came up to the BVI and MOS standard of ultra pure chemical reagents. It was shown that the self-made nuclear track microfilters could be used in industrial production of ultra pure chemical reagents.  
        关键词：nuclear track microfilter;clarification of ultra pure chemical reagent;pilot study   
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        发布时间：2022-08-16
      • Guifeng Xu,Mingguang Bi,Jiong Zhang
        Vol. 11, Issue 9, (1988)
        摘要：A small accelerator was used to trail-produce nuclepore filter membranes. Ions 14N, 16O, and 20Ne were accelerated in SINR cyclotron to irradiate polycarbonate films. It was proved that a small accelerator was feasible for making nuclepore filter membranes.  
        关键词：Cyclotron;Nuclear track;Sensitivity   
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        发布时间：2022-08-16
      • Yulin Cheng,Liping Zheng,Junying Lin,Qin Wang,Yougen Wu,Zhigen Weng,Xiuhong Hao,Shengfen Sun
        Vol. 11, Issue 9, (1988)
        摘要：The fission track technique has been used to estimate the uranium concentration in blood of normal persons, U-exposed workers and leukemia patients in order to establish the statistical distribution of trace uranium in human blood.The mean U concentration in blood of healthy persons was (3.06±0.10)×10-10 g/ml; of U-exposed workers was(4.53±0.12)×10-10 g/ml; and of leukemia patients was(7.74±0.15)×10-10 g/ml, which was 2.5 times higher than the mean of normal persons. The advantages of the nuclear track technique are good sensitivity and selectivity. And blood samples were directly taken from finger(20µl).  
        关键词：fission tracks;U in blood;Man-made mica detectors   
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        发布时间：2022-08-16
      • Youyu Zhang,Lizhang Guo
        Vol. 11, Issue 9, (1988)
        摘要：The analysis of uranium in water, blood, urine and toothpaste samples with the fission track method was described. The stability of tracks and the feasibility of the method were discussed. The results were compared with those reported. The method has the adantages of high sensitivity, less sample needed, steadiness and economy. It is also applicable to analysis of plutonium and radon.  
        关键词：Track;Analysis;U in blood   
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        发布时间：2022-08-16
      • Huailu Chen,Huazhong Yang,Dongzhi Zhao,Kaixue Wang
        Vol. 11, Issue 9, (1988)
        摘要：In order to know the contents of uranium in human urine, urine samples from 10 healthy persons with different ages and sexes in Lanzhou area were analysed with the fisson track method. The results, in contrast with the contents of uranium in Yellow River water (in Lanzhou section), tap-water and rainwater indicated that the content of uranium in human urine was lower than that in tap-water. From the ratio of uranium in human urine to that in tap-water, the maximum excreted rate of uranium from urine is evaluated to be 42.2%.  
        关键词：Fission track;urauium;urine   
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        发布时间：2022-08-16
      • Huazhong Yang,Yuanxun Qiu,Zhiguang Wang
        Vol. 11, Issue 9, (1988)
        摘要：The concentration ratio of 6Li to 7Li was determined by a track detector (polycarbonate). The results are in agreement with those of chemical methods.  
        关键词：the concentration ratio;Irradiation;Polycarbonate   
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        发布时间：2022-08-16
      • Shilun Guo,Guoxiao Ren,Zuoxiu He,Shengfen Sun,Xiuhong Hao,Yong Luo,Yuhua Zhao,Yulan Wang,Yinzao Zhou,Rongqing Huang
        Vol. 11, Issue 9, (1988)
        摘要：Dirac theory and the grand unified theories predicted the existence of magnetic monopoles in the universe. P. B. Price et al. pointed out the possibility to determine the flux of magnetic monopoles passing through the earth by counting the tracks created by monopole-nucleus bound state in mica. Natural muscovite mica exploited from Xinjiang First Mica Mine in China was selected as detectors and dated by the fission track method. The fission track age of 129±8 Ma was obtained, which was considered to be the approximate age for the mica to record tracks of monopole-nucleus bound state.  
        关键词：magnetic monopole;natural muscovite mica;fission track dating   
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        发布时间：2022-08-16
      • Tiancai Long
        Vol. 11, Issue 9, (1988)
        摘要：The FT ages of two samples taken from the underlying tuff of basalt and the overlying baked conglomoeate, were dated. The first FT age of apatite is 6.79±0.14Ma and the second set of the FT ages of apatite and zircon are 1.48±0.46Ma and 1.68±0.12Ma respectively. Therefore, the late eruption of the basalt was considered to approximately corresponding to the lower boundary of the Quaternary Period, i,e. about 1.8 Ma BP. The FT dating in the Penglai Peninsula thus provided strong evidence to discuss the age of the lower boundary of Quaternary Period in China.  
        关键词：basalts;fission track age   
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        发布时间：2022-08-16
      • Yushui Feng,Junwen Li,Zhikai Lin,Dongliang Qiao
        Vol. 11, Issue 9, (1988)
        摘要：In the paper a personnel neutron dosimeter based on a CR-39 plastic track detector registering heavy recoils and alpha particles is described. Experimental results show that the sensitivity of CR-39 detector to 241Am-Be neutron source is around (2.10 ± 0.05) ×10-4 tracks per neutron. The limit of detection for the dosimeter is 7.81×10-5 Sv with a total error less than ±20%.  
        关键词：CR-39 plastic;Neutron;Dose equivalent;personnel neutron   
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        发布时间：2022-08-16
      • Bing Shang,Jiaxing Wang
        Vol. 11, Issue 9, (1988)
        摘要：Experiments of using home made CR-39 films to register alpha-particles were carried out. After exposing the CR-39 film to an alpha source, distinct tree-like tracks on the foil had been found by using reasonable chemical and electrochemical etching treatment. Under the identical exposure condition, there was a linear relationship between alpha-particle fluence and track density. The relative register efficiency was 20% and average back-ground tracks 0.2/mm2.  
        关键词：CR-39;electrochemical etching;alpha-particles   
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        发布时间：2022-08-16
      • Shi Feng,Tiesheng Kang,Shicheng Wang,Pengji Zhai
        Vol. 11, Issue 9, (1988)
        摘要：Geological thermal history of a petroleum borehole at Linqing sedimentary basin was studied using apatite fission track analysis. On the basis of the relation of apatite fission track ages and distributions of projected lengths of fossil fission tracks to burial depth, the annealing zone of apatite fission tracks and the fossil temperature gradient in the borehole were evaluated.  
        关键词：Apatite;fission track age;distribution of projected length;annealing zone;fossil temperature gradient   
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        发布时间：2022-08-16
      • Baixin Wan
        Vol. 11, Issue 9, (1988)
        摘要：Application of the track measurement method for uranium deposit exploration was briefly elucidated. The usableness of the method was verified by a large number of exploration results. Some related problems were also discussed.  
        关键词：track measurement;mineral borehole;ore body   
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        发布时间：2022-08-16
      • Yuchun Shi,Bangtong Zhang,Hongwei Ma
        Vol. 11, Issue 9, (1988)
        摘要：α-track photography is a method used for recording the distribution and occurrence of radioactive elements in ores, rocks and minerals by the α-track detector (acetate film). It is low-priced, simple and realizable, with a sensitivity of ppm, the method is superior to roentgenography and close to the emulsion method and the fission track method.  
        关键词：α-track;solid state track detector;radioactive elements   
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        发布时间：2022-08-16
      • Jianming Li,Hongmin Deng
        Vol. 11, Issue 9, (1988)
        摘要：The distribution of boron in pea (Pisum sativum L.) and alfalfa (Medicago sativa L.) was determined using SSNTD. The results show that boron concentrations in leaves are highest, furthermore boron concentrations of the base leaves are higher than those of the top leaves. Among flower tissues, calyx has the highest boron concentration.  
        关键词：SSNTD;Boron;plants   
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        发布时间：2022-08-16
      • Xiaohong Sun,Manjiu Guo
        Vol. 11, Issue 9, (1988)
        摘要：The distribution of boron in the weld metals were investigated by α-particle track microphotography technique. The structure and amount of boron-containing phases were determined by TEM and chemical phase analysis.  
        关键词：α-particle track;boron distribution;weld metals;boron-containing phase;phase analysis   
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        发布时间：2022-08-16
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