最新刊期
      卷 0 ， 期 0 ， 2020
      • XIE Dong HE Duohui LI Weimin XUAN Ke
        Issue 5, (2005)
        摘要：Oracle data acquisition in EPICS at Hefei Light Source (HLS) was described. This article analyzed Experimental Physics and Industrial Control System (EPICS) channel access (CA) protocol and Oracle network protocol, described the software architecture of the data acquisition system and it’s design method in detail. At last, it gave a method to test it’s stability. The test result and the performance was described.  
        关键词：EPICS (Experimental Physics and Industrial Control System);Oracle;CA (Channel access);Net 8   
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        发布时间：2021-03-12
      • MIAO Jingwei WANG Peilu WANG Hu YANG Chaowen MIAO Lei ZHU Zhouson ZHENG Sixiao LIU Zhongyang LIAO Xiaodong SHI Miangong
        Issue 5, (2005)
        摘要：The surface morphology of monocrystalline Si(111) implanted by a N10+ cluster ion of 76keV at a dose of 1.7×1017cm-2 was observed using a scaning probe microscope. It was found that the implantated layer directly transformed from monocrystalline into a nanocrystal structure in this condition and its crystallite dimension was also measured. The infrared absorption experiment indicated that the samples intensely and uniformly absorbed infrared light of both near and far infrared regions with a very wide frequency band, and the transmission of about 10% was always kept. The preliminary study indicated that an excellent light absorption material was formed in the implanted layer.  
        关键词：Cluster ion implantation;Monocrystalline silicon;Nanocrystal structure;Infrared absorption spectra   
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        发布时间：2021-03-12
      • HU Bitao SONG Yushou
        Issue 5, (2005)
        摘要：Using STARF code developed by ourselves, the scattering of Uq+(q=10-40) from Al (111) surface under grazing angle were simulated. In our simulation, the dependence of the reflection coefficient and the reflection angle distribution on incidence angle, charge state and kinetic energy of the projectile were systematically studied. In the present work, our simulation results were also compared with results in references and found in good agreement with them.  
        关键词：Channeling effect;Low energy high charge state ion;Grazing incidence;Image potential   
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        发布时间：2021-03-12
      • XING Qingzi LIN Yuzheng FU Shinian
        Issue 5, (2005)
        摘要：The 2D PIC (Particle in cell) method, widely used in the calculation of space charge effect for particle dynamic simulations is described. The difference between t-code (Using time as independent variable) and z-code (Using longitudinal position as independent variable) is illuminated. For single beam acceleration and positive-negative ion beams acceleration, simulation results of the transmission rate using t-code and z-code are provided, respectively, with the structure parameters of the RFQ( Radio frequency quadrupole) accelerator in the Clean Nuclear Power Project of Major State Basic Research Development Program. The results show that when the phase spread or energy spread of the bunch is large, relatively large errors could be introduced in z-code during the calculation of space charge effect. Therefore t-code should be adopted instead in the dynamic simulations for more accurate results.  
        关键词：PIC(Particle in cell) method;Space charge effect;t-code;z-code;RFQ (Radio frequency quadrupole) accelerator   
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        发布时间：2021-03-12
      • Issue 5, Article number: 349(2005)
        摘要：<正>由中国文物保护技术协会释光与电子自旋共振测定年代专业委员会(挂靠在上海博物馆)、中国地震局地质研究所地震动力学国家重点实验室、中国科学院寒区旱区环境与工程研究所和中国第四纪科学委员会干旱区环境专业委员会共同主办的第九次释光(Luminescence)与电子自旋共振(ESR)测定年代学术讨论会2004年7月11-13日在兰州召开。来自内地和香港的大学、中国科学院及部委研究所和文博系统32个单位的专家、学者出席了讨论会。这次讨论会还有来自英国牛津大学和法国自然博物馆的同行参加,所以是历次讨论会中人数最多的一次。这次讨论会主要研讨了释光包括热释光(TL)、光释光(OSL)和电子自旋共振测定年代的理论、方法和技术;考古和地质样品年代的测定及其应用;与测定年代有关的辐照剂量学;热释光和光释光测量仪器和研制和改进等。其中有23篇论文在会上作了报告和交流。本选编辑录了其中12篇中文稿予以发表。  
          
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        发布时间：2021-03-12
      • WANG Weida LEUNG P L XIA Junding
        Issue 5, (2005)
        摘要：The pre-dose technique is very useful for thermoluminescence dating of porcelain. It incorporates two characteristics in the porcelain dating, i.e. thermal activation and radiation quenching. Two methods, activation method and quenching method, for evaluation of paleodose were introduced. The results show that activation method and quenching method one suitable for dating of lower limit age (less than 100 years B.P.)and upper limit age (greater than 1000 years B.P.), respectively. When both methods are co-used, the dating will be more accurate.  
        关键词：Porcelain thermoluminescence dating;Thermal activation;Radiation quenching   
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        发布时间：2021-03-12
      • XIA Junding WANG Weida LEUNG P L
        Issue 5, (2005)
        摘要：Thermoluminescence (TL) dating using an activation method in pre-dose technique was described. Three vases in underglaze blue with elephant ears and one vase in underglaze red with elephant ears in Yuan Dynasty were dated by this method. The results show that the TL ages are all less than 100 a B.P., and in which sbc 648 and sbc 649 were imitated in recent years. This method is quick, convenient and reliable for porcelain dating with the age of less than 1000 a B.P.. As a comparison, a porcelain sample with underglaze blue in Yuan Dynasty was dated too, and its TL age is 620±140 B.P.. In addition, some complex factors associated with dating have been discussed and a resolution has been raised, which will help improve the accuracy of TL dating.  
        关键词：Thermoluminescence dating;Porcelain;Pre-dose;Thermal activation   
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        发布时间：2021-03-12
      • LI Huhou
        Issue 5, (2005)
        摘要：The principle of luminescence dating is based on the fact that a crystal (phosphor) can accumulate radiation energy in natural environment with a stable radiation field, and then can emit photons when stimulated by other forms of energy. There are different efficiencies of absorbing energy and luminescence responses to different radiation for various phosphors. Therefore, much knowledge originating from different fields has been used in the luminescence dating even if there is no idea itself in the field. The author has developed BG2003 luminescent spectrograph and a selective frequency luminescent technique to improve the luminescence dating in last few years. The history of luminescence dating is reviewed and the reason for developing this new technique is described in detail.  
        关键词：Phosphor;Luminescence dating   
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        发布时间：2021-03-12
      • ZHAO Hua LU Yanchou YIN Jinhui
        Issue 5, (2005)
        摘要：After detailed field work on the stabilized and semi-stabilized sand dunes of different micro-geomorphology in Horqin sandyfield, 25 OSL samples and 5 radiocarbon samples are collected for dating to reconstruct the eolian dune activities in the Holocene. Single-Aliquot Regenerative-dose (SAR) protocol was used to determine the equivalent dose (DE) for coarse quartz OSL dating. Based on OSL and 14C dates obtained from five sand dune-soil or swamp sediment profiles, a preliminary geochronology was presented for the sand dune activities in the Holocene. The results show that the sand dune activity was more and more weakly in the early Holocene and stabilized at around 7.5 ka B.P.. The Horqin sandyfield developed its grass soil and corresponding vegetation between 7.5 ka and (2.0±0.2) ka B.P. and the sand dunes were re-active after (2.0±0.2) ka B.P., possibly due to the human activities.  
        关键词：Horqin sandyfield;Holocene sand dune activity;Single-aliquot regenerative-dose dating   
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        发布时间：2021-03-12
      • TANG Qiang ZHANG Chunxiang
        Issue 5, (2005)
        摘要：Thermoluminescence (TL) and optical stimulated luminescence (OSL) emission spectra of SrSO4:Eu (0.1mol%) and CaSO4:Eu(0.1mol%) were measured. The results illuminate that the TL and OSL emission wavelengths of SrSO4:Eu are 375nm, and those of CaSO4:Eu are 385nm, Which indicate that TL and OSL have the same luminescence centers, and the luminescence comes from transitions between energy levels of Eu2+. The luminescence of Eu3 + is also observed in TL emission spectrum of CaSO4:Eu.  
        关键词：Optical stimulated luminescence;Thermoluminescence;Spectra   
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        发布时间：2021-03-12
      • DIAO Shaobo YE Yuguang
        Issue 5, (2005)
        摘要：The estimation of average life of trapped electrons is an important factor in the dating studies. But there exists a difference of several orders of magnitude in the estimated average lives if different models are selected. Several different estimation models of average life of trapped electrons were introduced in the paper and some discussions were given.  
        关键词：Trapped electrons average life;Estimating models;Application   
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        发布时间：2021-03-12
      • WANG Xulong LUYanchou LI Xiaoni
        Issue 5, (2005)
        摘要：Here we reported the improvements in luminescence dating from fine grains of Chinese loess. For isolating fine quartz from polymineral grains in Chinese loess, it is more valuable to use ultrasonic bathing during etching the feldspar by H2SiF6, because of the aggregates of fine grains. IR detection confirmed the purity of OSL signals from fine quartz for luminescence dating purposes. Single-aliquot regenerative-dose (SAR) protocol was used to determine the equivalent dose (DE) for fine quartz OSL, polymineral IRSL and Post-IR OSL in Chinese loess during the last glacial-interglacial. Linear modulation technique was used to identify the characteristic of Post-IR OSL from polymineral grains. It is confirmed that characteristic of Post-IR OSL after long time of IR stimulation is similar to those of fine quartz OSL. In order to obtain reliable DE value from Post-IR OSL of polymineral grains, it is necessary to determine a sufficient IR stimulation time by the plateau test of Post-IR OSL DE v.s. IR stimulation duration, as did for preheating condition in previous luminescence dating. The performance of IRSL and Post-IR OSL in determining the DE value with ranges of 0-300 Gy was also discussed by comparing to fine quartz OSL DE.  
          
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        发布时间：2021-03-12
      • LI Yan LI Huhou WEI Mingjian
        Issue 5, (2005)
        摘要：Luminescence character of KCFW01 feldspar with different stimulating optical and heat sources has been studied on the BG2003 spectometer. Some luminescence spectrograms of the feldspar with different wavelengths have been obtained. There are two characteristic wavelengths in the feldspar, which have a nice luminescence response to the radiation doses. It could be useful to luminescence dating.  
        关键词：Feldspar;Selected frequency luminescence (SFL);Dating   
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        发布时间：2021-03-12
      • CHEN Hualiang LI Huhou WEI Mingjian
        Issue 5, (2005)
        摘要：We have acquired characteristic spectra of a sample consisting of many minerals for the selected frequency luminescence using BG2003 spectronmeter stimulated with red light, green light of a laser source, and a heat source, respectively. And its DE and saturated dose can be obtained under different stimulation conditions. It is clear that different wavelengths can be adopted for dating. The saturated dose measured using BG2003 spectrometer was consistent with that measured using RGD-3D TL equipment, which was equal to 400 Gy.  
        关键词：Characteristic luminescence spectra;Equivalent dose   
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        发布时间：2021-03-12
      • TANG Qiang ZHANG Chunxiang LUO Daling CHEN Guoyun XIONG Zhengye
        Issue 5, (2005)
        摘要：Thermoluminescence (TL) and optical stimulated luminescence (OSL) dose response curves of alkaline-earth sulfate doped with rare earth ions were measured. The non-linear dose response parameters were obtained by using the composite action dose response model. It is concluded that the linearity of dose response is relative to the species of rare earth ions and the defect structure. The one-hit factors (R) are closes to 1 in sulfate phosphors doped with Eu ions, which means that the dose responses are sublinear. But the dose responses are supralinear since R < 0.5 when sulfate phosphors were doped with Tm or Dy ions. The value of R decreases with the increasing of TL peak temperatures, which means that contribution to dose response from the two-hit events is increased. The experiments also show that the dose response parameters of OSL are similar to those of TL.  
        关键词：Dose response;Rare earth;Sulfate   
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        发布时间：2021-03-12
      • YIN Gongming LIN Min
        Issue 5, (2005)
        摘要：Laboratory experiments and detailed investigations of quartz from sediments indicate that it is, in principle, possible to date the last bleaching time of sediments. This paper gives a brief review on ESR dating of sediments. Considerable study has been directed at ESR dating of optically- bleached quartz in sediments. Quartz ESR signals have a remarkably complex response to light exposure. Good results have been obtained using the Al, E and Ge centers. The age range of ESR dating of sediments is much longer than 2 million years. But ESR dating of sediments is still not a very reliable technique till now.  
          
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        发布时间：2021-03-12
      • WANG Guangxiang ZUO Ruixin LI Juguang
        Issue 5, (2005)
        摘要：This article introduces a kind of OL apparatus that we design and can test 20 samples continuously. This OL apparatus uses semiconductor laser as blaze lamp-house. The semiconductor laser uses optical fiber as output. The facula’s size and light power can be adjusted. At one time it also simply introduces the function and the fabric of this OL apparatus.  
        关键词：Laser;OL;Apparatus;Dating   
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        发布时间：2021-03-12
      • LIU Chunlei LIU Yang LIU Shitao XU Zizong WANG Zhaomin
        Issue 5, (2005)
        摘要：The paper reports the experimental result of a kind of phosphor screen (Gd2O2S:Tb) which can be used to reinforce image. The phosphor screen has photon yield about 9×104 / MeV, and decay time of fluorescence measured by a single-photon-time resolution spectrometer is 833μs. The emission spectrum is obtained, which consists of a 545 nm main band surrounded by several weaker narrow bands. The experiment also shows that the phosphor screen has an afterglow component with a decay time of about one minute after natural light exposure.  
        关键词：Fluorescence decay time;Photon yield;Ailerglow;Emission spectrum   
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        发布时间：2021-03-12
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