最新刊期
      卷 0 ， 期 0 ， 2020
      • Chen Tiemei Yang Quan Wu En
        Issue 4, (1993)
        摘要：Five tooth samples from the palaeoanthropological site of Jinniushan were dated with both electron- spin- resonance（ESR） and uranium- series techniques. The ESR age of about 230 ka is in good agreement with the U- series dating result, which confirms the hypothesis of possible coexistence of Homo erectus and Homo sapiens in China . Problems in ESR dating are discussed such as :1) inappropriaty of simple exponential extrapolation for accumulated dose determination; 2) experimental measurement of alpha detection efficiency and radon emanation and 3) selection of U- uptake model.  
          
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        发布时间：2021-04-09
      • Peng Zicheng Yuan Wanchun Li Ping Man Fasheng
        Issue 4, (1993)
        摘要：Based on dating of tooth enamel from the 11th layer of Peking Man Site, the ESR age’s errors for the early U- uptake and the linear U- accumulation models have been calculated by means of the error transportation theory and the values ranged from 16% to 17%, which is obviously less than that calculated by the single error’s addition as mentioned in early publications.  
          
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        发布时间：2021-04-09
      • Chen Yijian Liu Guifen
        Issue 4, (1993)
        摘要：Nine calcareous nodule samples obtained from a loess profile in Luochuan of China were dated with ESR using "BL" signal at g = 2.0038. Agreement between ESR ages and stratigraphic ages was observed for four samples from Q 2 and Q 3 strata, but ESR ages of the samples from Q1 stratum were far too small due to the redeposit of carbonate originated from groundwater. Futhermore, results showing the properties of "BL" signal were also reported.  
          
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        发布时间：2021-04-09
      • Huang Peihua Jin Sizhao Peng Zicheng Liang Renyou Lu ZhongjiaWang Zhaorong Chen Jinbo
        Issue 4, (1993)
        摘要：The result of ESR dating for the second group of samples from Peking Man Site is presented. Non- linear fitting and the dose rate formula for tooth enamel are adopted to calculate ESR ages and their errors based on four kinds of U- uptake models .The ages are estimated to be 575±101 ka for the 11th layer （containing the first skull of Peking Man）,409±72 ka for the 8- 9th layer（skulls LⅠ,LⅡ and LⅢ）,365±64 ka for the 6- 7th layer, and 290±51 ka for the 3rd layer（skull HⅢ）.  
          
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        发布时间：2021-04-09
      • Liang Xingzhong
        Issue 4, (1993)
        摘要：There are four basic cases of resetting for E’ centre dating of a - quartz acccording to geological survey and analysis results with scanning electron microscopy and cathode luminescence. The characteristics of a - quartz for each case are described. Suggestions are given for the sample gathering method and the determination of accumulated dose.  
          
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        发布时间：2021-04-09
      • Yang Quan Chen Tiemei Hu Yanqiu Xia Zhengkai
        Issue 4, (1993)
        摘要：Two stromatolite samples from Nihewan basin were dated with both electron- spin- resonance（ESR） and uranium- series techniques. The ESR age of two samples is in good agreement with the U- series dating result, which confirms that there is a late pleistocene layer in Nihewan basin.  
          
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        发布时间：2021-04-09
      • Ye Yuguang He Jie Diao Shaobo
        Issue 4, (1993)
        摘要：Based on the experiments of ESR dating for more than 100 samples, the feasibilities of ESR dating using different centres of quartz in sediments at room temperature are discussed. Reliable ESR ages of sediments within several handred thousands years can be obtained from Ge centres of quartz,while the ESR ages of older sediments （more than 5×105a）can be obtained from E’ centres of quartz in some geological conditions （marine sediments or loess） by using a higher microwave power. OHC centres can not be used for ESR dating, but it can judge whether quartz samples are from the same origin .  
          
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        发布时间：2021-04-09
      • Jin Sizhao Huang Peihua
        Issue 4, (1993)
        摘要：This paper gave a brief introduction to The 3rd International Symposium on ESR Dosimetry and Applications held in Washington of United State,14- 18 October ,1991. Some progress in ESR dating is emphasized including carbonate dating, quartz dating and tooth/bone dating.  
          
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        发布时间：2021-04-09
      • Wang Weida
        Issue 4, (1993)
        摘要：The annual β dose makes up about 50% of the total annual dose for the quartz inclusion technique in TL dating of pottery. In order to determine accurately annual β dose, the thickness response （due to the build- up effect） of β dose in fragments must be studied. It was shown that when thickness of fragments is within 7mm the thickness response of β annual dose can be corrected by using the correction factors obtained from this experiment. The correction factors are also useful for all other β measurements.  
          
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        发布时间：2021-04-09
      • Ji Fengju Li Jianping
        Issue 4, (1993)
        摘要：The key to date slipping of landslide by TL method is whether the temperature and pressure caused by slipping can lead the original TL to’zero’ for some minerals within the slipping band. For this purpose, the simulated experiments under different temperature- pressure were made and the TL annealing effect of landslide gouge was studied. The results show that the frictional heating caused during slipping is a main factor leading the mineral’s TL to decrease on the slip plane and that increment of temperature is in close relation with strength of shear stress, thickness of ladslide gouge and amount of displacement. As an example, the slipping age of a paleo- landslide at Huangtupo.Hubei Province, has been dated to be about 140 ka.  
          
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        发布时间：2021-04-09
      • Liu Jingfa Xie Xiande Wang Daode
        Issue 4, (1993)
        摘要：Two special TL phenomena have been found in Yanzhuang meteorite through the determination of the natural TL, annealed TL and induced TL by β radiation: l.when the sample of Yanzhuang meteorite is annealed at temperature up to 500℃, the TL peak induced by β rays moves to lower temperature with the increasing of irradiation dose; 2.when the annealed temperature is greater than 600℃, the TL peak temperature of the annealed sample is higher than that of the unannealed sample. Yanzhuang meteorite is composed of black and light parts. The equivalent β dose for the two parts are 9238 Gy and 25753 Gy respectively .showing that the thermal events age for the two parts in the meteorite is not equal, and their thermal histories are not the same, either.  
          
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        发布时间：2021-04-09
      • Wang Weida
        Issue 4, (1993)
        摘要：The annual dose conversion factors of gross a count rate and their errors for arbitrary Th and U contents and the Th/U weight ratio covering the entire range 0≤Th/U ≤∞ were calculated. The results show that the error appearing in the final TL age estimate will be±5.1% to 8.3% for 0≤Th/U≤∞ and only ±2.5% to ±4.1% for 1.1≤Th/U≤9.5 when the Th/U ratio is not determined but only the gross a count rate is measured.  
          
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        发布时间：2021-04-09
      • Zheng Gongwang
        Issue 4, (1993)
        摘要：The study shows that some samples such as brick and tile with a thermal event or agglutinated at high temperature are rather ideal , but the minimum accumulative dose for sand samples is not often clear. This is one of the reasons why it is not easy to get a definite result of TL dating for a geological sample.  
          
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        发布时间：2021-04-09
      • Xia Junding
        Issue 4, (1993)
        摘要：In order to complete a quick authenticity testing for the Tang Dynasty Tri- coloured Pottery,a method for preparation of disc samples is developed.About 50 mg fine grain of scraps taken from some obscure position of the tested pottery was divided into 15 pents.some of them was exposed to artificial β- radiation and the natural glow curve was compared with the artificial one,the sample could be dated both rapidly and accurately. Five pieces of the pottery were dated with this method, and one of them was found to be a sham.  
          
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        发布时间：2021-04-09
      • Lu Liangcai Huang Baolin
        Issue 4, (1993)
        摘要：Lacustrine deposits from Aibi Lake, Xinjiang have been dated by TL technique. The results suggest that the regression process of the lake has a period of about 5000 years and 3 climate stages occur sequently in the evolution process in Holocene, including the dry and cool stage of 10- 7 ka B.P., the moist and warm stage of 7.5- 2.5ka B.P. and the dry and cool stage since 2.5ka B.P.  
          
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        发布时间：2021-04-09
      • Liang Renyou Xu Yunhua
        Issue 4, (1993)
        摘要：Alanine/EPR dosimetry is a new method used for measuring high- level radiation dose. An EPR spectrometer（model ER- 200D） was calibrated and ,based on the calibration result the radiation field around the 200 MeV linac in HESYRL was measured by using alanine dosimetry.  
          
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        发布时间：2021-04-09
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