最新刊期
      卷 0 ， 期 0 ， 2020
      • LI Huhou
        Issue 12, (2001)
        摘要：A new equipment of dating with selected frequency optical luminescence (SFOL) has been developed in our laboratory. It means that the wavelength of the stimulating source and the emission photons can be selected and determinated. Then, we can select the frequency to separate different minerals in the fine grain samples.  
        关键词：Selected frequency optical luminescence (SFOL);Dating   
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        发布时间：2021-03-12
      • JIN Sizhao
        Issue 12, (2001)
        摘要：The ESR dating of Al and Ti centers for the quartz in igneuse rock can give the time when the rock reached the closure temperature. But the use of this method is hindered by two factors: 1) the ESR signals of Al and Ti centers can only be obtained at low temperature(100K); 2) The ESR full-peak spectra are complex . It is difficult to choose the peak for dating. For the reasons given above, little work has been done with Al and Ti centers to date the igneous rocks. In this work, the experiments were done at 100K and in a modulation magnetic field of 5×10 -4 T, and got good results because of the suitable conditions. The spectra were stable and well reproduced. It was easy to choose a peak for dating and to determine the height of the peak. In our sample, the age of Al center and Ti center were 774.7ka and 256.0ka, respectively. The difference between the ages was induced by the fading of sun-light. Experiment had been done by sunlight and ultravoilet exposure. The result was that 50% Al-centers and 27% Ti-centers were left by sunlight, 50% Al-centers and 50% Ti-centers were left by ultraviolet exposure.  
        关键词：ESR;Igneouse rock;Al-center;Ti-center;Modulation magnetic field;Fading of light   
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        发布时间：2021-03-12
      • TAN Kaixuan 1 LIU Shunsheng 1 Günther A.Wagner 2 1
        Issue 12, (2001)
        摘要：The characters of 2D TL,3D TL and OSL of quartz in Habahe granite and its adjacent gold deposits in Altay, Xinjiang, China were analyzed. There existed notable difference in TL and OSL of granite quartz, auriferous quartz and barren quartz vein in gold deposits, and showed that the formation of gold deposits is related to hydrothermal processes, and later than the formation of Habahe granite body. TL and OSL can be used as a new method and indicator for gold deposit exploration in Altay.  
        关键词：Thermoluminescence;Optically stimulated luminescence;Quartz;Gold deposit;Altay   
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        发布时间：2021-03-12
      • DIAO Shaobo YE Yuguang
        Issue 12, (2001)
        摘要：The average life of oxygen vacancies in quartz from sediments were estimated using ESR signal intensity of E’ centers by thermal activitation technique. The experimental results showed that the second order kinetics equation was more suitable to estimate the average life than the first order kinetic equation. The average life of oxygen vacancies in quartz of sediments form 4895m to 4908m in Tarim basin was about 10 18 years at 27℃, and it was three orders of magnitude bigger than the average life in granitic quartz at the same temperature.  
        关键词：Annealing experiment;Sediments;Average life;Oxygen vacancies   
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        发布时间：2021-03-12
      • JI Fengju LI Jianping ZHENG Rongzhang
        Issue 12, (2001)
        摘要：In order to determine the time sequence of recent eruption in Tianchi volcano, the TL thermal-stability has been investigated for pumice and sanidine phenocryst within the volcanics. The results show that the TL signals of pumice and sanidine phenocryst have better thermal-stability, so they can be used for TL dating. Based on the research, the times of four eruptive events have been dated by TL method in the past 5000a, that is:300-350a B.P.±?1000a B.P.±?3500-4000a B.P.± and 5000a B.P.±. These results are consistent with the historical records of the volcanic eruption and other dating methods within the error range.  
        关键词：Thermol-stability of TL signals;Tianchi volcano;Sanidine phenocryst;Pumice;Recent eruptive events   
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        发布时间：2021-03-12
      • LIANG Renyou
        Issue 12, (2001)
        摘要：A new ESR dating method--ROSY ESR dating program is introduced. It enabled us to calculate the beta attenuation in thin layers of tooth enamel based on "One Group" theory. This approach leads to average beta doses which are significantly lower than those from Grün’s DATA software, but more close to the results from calculation based on Monte Carlo data. The ages of six tooth enamel samples from Yunxian site, Hubei, were determined and compared with each other by using ROSY and DATA programs.  
        关键词：ROSY ESR dating program;β dose rate;One-group transport theory   
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        发布时间：2021-03-12
      • LEUNG P L LI Guanqiu
        Issue 12, (2001)
        摘要：Pre-dose method normally requires several times of artificial doses been added to the sample (test dose or calibrated dose) to process the thermo-activation, thermoluminesence and quenching effect. The error of the measurement usually increases with multiple procedure and dose adding (about 20%-30%). In order to increase the accuracy of the dating, this article selected a constant dose value as a reference of thermoluminesence and quenching effect. Using different testing procedures to evaluate the change in luminous intensity (sensitivity) by a set of mathematical equations. The best testing procedures are selected to minmize the error. The error can be reduced to almost 10% which is much better than the original dating method. The testing method is feasible but further works are necessary to testify, the conclusion.  
        关键词：Thermoluminesence;Pre-dose method;Luminescence center;Ceramics   
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        发布时间：2021-03-12
      • WANG Weida 1 LEUNG P L 2 XIA Junding 1 ZHOU Zhixin 1 1
        Issue 12, (2001)
        摘要：Thermoluminescence (TL) dating using a regression method of saturating exponential in pre-dose technique was described. 23 porcelain samples from past dynasties of China were dated by this method. The results show that the TL ages are in reasonable agreement with archaeological dates within a standard deviation of 27%. Such error can be accepted in porcelain dating.  
        关键词：Porcelain;Thermoluminescence dating;Pre-dose technique;Saturating exponential regression   
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        发布时间：2021-03-12
      • XIA Junding WANG Weida
        Issue 12, (2001)
        摘要：In order to improve accuracy of TL authentication test for porcelain, a method of measurement of annual dose using ultrathin (CaSO 4:Tm) dosage layer on porcelain was studied. The TLD was placed on the part of porcelain without glaze.A comparison of measurement of annual dose for surface TLD, inside TLD and alpha counting on porcelain was made. The results show that this technique is suitable for measuring annual dose and improving accuracy of TL authentication test for both porcelain and pottery.  
        关键词：TL dating;Porcelain;Annual dose;TLD   
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        发布时间：2021-03-12
      • YIN Gongming
        Issue 12, (2001)
        摘要：The thermoluminescence pre-dose technique for dating ancient porcelain was developed in many laboratories. This technique was the only method which could directly determine the age of old porcelain. But the thermoluminescence high-temperature signal (over 200℃) had not been studied. We conducted a preliminary study of the characteristics of thermoluminescence high-temperature signal, such as the TL natural glow curve, and the glow curves after beta or alpha irradiation. Most of the 32 ancient porcelains had thermoluminescence high temperature signal, and only one peak in their TL glow curve was found.  
        关键词：Porcelain;Thermoluminescence;High temperature signal   
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        发布时间：2021-03-12
      • LUO Daling TANG Qiang ZHANG Chunxiang
        Issue 12, (2001)
        摘要：The two peaks at higher temperature in thermoluminescence (TL) glow curve of MgSO 4:Dy are enhanced when a certain amount of P was co-doped into MgSO 4:Dy. One main dosimetric peak at about 283.6 ℃ and a satellite peak at about 352.7 ℃ are involved in the TL glow curve of the MgSO 4:Dy,P. The TL sensitivity of MgSO 4:Dy,P phosphor is two times higher than that of LiF:Mg,Ti. The dose responses to gamma rays in the dose range from 0.1Gy to 20kGy were obtained and fitted by the composite action dose response function to get the nonlinear characteristic parameters which indicate that the TL dose responses for the two peaks of MgSO 4:Dy,P are supralinear. While a trace amount of Cu was co-doped into MgSO 4:Dy,P the TL glow peak at 352.7 ℃ was suppressed and the TL sensitivity and the nonlinearity of dose response for the main dosimetric peak at 283.6℃critically depends on the concentration of dopant Cu. The dose response of MgSO 4:Dy,P,Cu (0.1 mol%, 0.5 mol%, 0.01 mol%) phosphor is linear-sublinear. The MgSO 4:Dy,P,Cu (0.1 mol%, 0.5 mol%, 0.004mol%) phosphor has a wider linear range in the dose response than MgSO 4:Dy,P(0.1 mol%, 0.5 mol%) and its TL sensitivity is close to MgSO 4:Dy,P (0.1 mol%, 0.5 mol%). It may be a candidate to measure radiation dose under higher dose circumstances. Furthermore, the composite action model was described further. The experimental results of the MgSO 4:Dy,P and MgSO 4:Dy,P,Cu obtained in this work show that the dosimetric properties of TL materials are linked with the defect structure in these materials, which is useful for understanding the TL mechanism of sulphates with cooperating the TL 3D emission spectra of these phosphors.  
        关键词：Themoluminescence;Dosimetric characteristics;MgSO 4:Dy;P and MgSO 4:Dy;P;Cu   
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        发布时间：2021-03-12
      • CHEN Shu’e
        Issue 12, (2001)
        摘要：The optical luminescence of mineral is its luminescence character. This character is related to the frequency and intensity of stimulating source. It is important to understand these relationships for OSL dating. Saturation doses of 5 feldspars, Labradorite, Anorthoclase, Cleavelandite, Albite and Microcline, have been determined with infrared stimulated luminescence.  
          
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        发布时间：2021-03-12
      • LAI Zhongping MIAO Xiaodong ZHOU Jie ZHANG Jingzhao
        Issue 12, (2001)
        摘要：EDs were obtained for an aeolian sample using (SAR). The sample was from loss and desert transitional zone in China. The ED values were from 2.7 to 4.4 Gy, showing a partial Normal School distribution. There were 30 EDs valued 3.1 Gy. The average of all 125 EDs was 3.26 Gy. The EDs obtained by SAR differed even for the well-bleached sample.  
        关键词：Regenerative-dose single-aliquot protocol;Aeolian quartz;GLSL;ED distribution   
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        发布时间：2021-03-12
      • WANG Guangxiang ZHANG Shengyuan KANG Junjian
        Issue 12, (2001)
        摘要：A simple apparatus for OL dating has been developed. The PC controlled apparatus can be conveniently applied in researchs of archeology and geology.  
        关键词：OL;OL apparatus;Dating   
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        发布时间：2021-03-12
      • LIU Jingfa 1 PENG Jinlian 1 SHI Manquan 1 LI Dahong 2 1
        Issue 12, (2001)
        摘要：The loss of volatile species CO 2 and TL intensity when calcite and limestone were shocked with different pressures was reported in this article. Incipient to complete CO 2 and TL loss occured over a pressure range of 10 to 70GPa. It was approached the relationship between shock-induced CO 2 loss and TL intensity when the natural mineral calcite and limestone were shocked by the meteorite. We developed a method with which the shock-induced CO 2 loss from calcite and limestone could be measured by TL intensity.  
        关键词：Shock-induced;Loss of CO 2;TL intensity;Calcite;Limestone   
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        发布时间：2021-03-12
      • ZHENG Gongwang ZHU Zhongli REN Xiusheng TIAN Zhaoyu
        Issue 12, (2001)
        摘要：The change of TL intensity reflects contents varying of environmental radioelement around the sample. Due to the existence of oil/gas reservoir, then the oil/gas diffusion and elemental migration caused by the reservoir, abnormal environmental radioactivity area will appear in the originally uniform field. It is estimated that when varying of 1% K or one millionth of U or Th, the error of TL dating will reach about 10%.  
        关键词：Natural TL;Environmental radioactivity;TL dating   
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        发布时间：2021-03-12
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