最新刊期
      卷 0 ， 期 0 ， 2020
      • LI Huhou
        Issue 11, (2007)
        摘要：Thermoluminescence (TL) and Optical-luminescence (OL) is solid radiation dosimeter in the origin time. The history of age determination using those radiation dosimeters has been developed more than fifty years.There is another kind solid which it is can’t luminescence in the common state,but it wills being luminescent after irradiated by the radiation than stimulating with optical.We call these phenomena as radio-photoluminescence.The fluores- cence and the exo-electronic emission are similar electron movement with luminescence at room temperature but dif- ferent with thermo ion emission.There is created electron emission with thermo stimulating means thermo-stimulat- ing exoelectronic emission (TSEE).There are created photons when it has an electronic movement,there are elec- tronic movement created in the solid when it has been accepted optical stimulated.All of those emissions are the en- ergy transformation procedure in the matter.It can be transportation mutually because they have wave characteristic in both two particles.Be care for this transformation procedure when we using it to explained some nature phenom- ena.The electronic emission and luminescence in solid are complex physical phenomena.They are more different things make together.The author would like to suggest discussed some attention on this field in the present paper.  
        关键词：Exo-electron emission;Luminescence   
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        发布时间：2021-03-12
      • LI Huhou~1 ZHAO Jianxing~2 WU Furong~2 WEI Mingjian~1 WU Jianming~2 LV Tongyan~1 1
        Issue 11, (2007)
        摘要：In order to do studies on properties of the luminescence in solid state,a new type of luminescence spec- trograph,BG2006,was designed.The idea is selected frequency and luminescence to make a multifunction equip- ment.Wavelength of the stimulating light source is adjustable so as to choose different wavelengths of the emitted photons.An irradiation system is designed for automatic irradiation with either alpha or beta ray.Experimental results obtained with the prototype spectrograph are given.  
        关键词：Selected luminescence;Luminescence spectrograph   
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        发布时间：2021-03-12
      • ZHAO Hua~1 LU Yanchou~2 WANG Chengmin~1 MAO Hongliang~1 ZHANG Zeqi~2 1
        Issue 11, (2007)
        摘要：To establish the timing of Holocene hydrological environment changes in the front oasis of Shulehe river alluvial fan in Hexi Corridor in Gansu Province,twelve water-laied sediment samples collected from three Holocene strata profiles have been dated by quartz OSL,as well as eight samples of organic silt-mud or silt-peat by 14C.For OSL dating the SAR protocol of coarse quartz was used for ten samples,and the fine grain fraction SAR and MARA protocols for four samples.Comparison of OSL ages obtained from the coarse quartz SAR with those from both the fine grain SAR and the MARA for same samples shows a good agreement within a standard deviation.The cross check between OSL ages and 14C ages for four group samples within same or contiguous layers is accepted in meas- urement error.On the basis of all age estimates obtained from both OSL and 14C,and of analysis of field observa- tion data,an elementary timing of Holocene hydrological environment changes,i.e.shifts of groundwater spilling belt, in the front oasis of Shulebe river alluvial fan is suggested in this paper.  
        关键词：Quartz OSL dating;Holocene;Hydrological environment;Shulehe river alluvial fan   
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        发布时间：2021-03-12
      • JIA Yaofeng HUANG Chunchang PANG Jiangli LU Xinwei ZHANG Xu
        Issue 11, (2007)
        摘要：Through various arrangements of pre-heat and cut-heat temperatures in the equivalent-dose estimation of Holocene loess using a Double-SAR dating protocol,the paper estimated the equivalent-doses from several loess samples by application of IRSL and Post-IR OSL signals,respectively.The measured results present that the equiva- lent-dose depends on the heat temperature,especially depends on the cut-heat temperature,showing the equiva- lent-dose increases with the cut-heat temperature;a plateau of equivalent-dose appears at the 200—300℃preheat temperatures and the 200—240℃cut-heat temperatures,furthermore,the equivalent-doses estimated by IRSL and Post-IR OSL signals respectively are close to each other,which resulted from the similar sensitivity change directions of optical stimulated signals and their smaller change ranges in the measurement cycles using the various tempera- tures of pre-heat and cut-heat.This suggests that the 200—300℃pre-heat temperatures and the 200-240℃cut-heat temperatures are fit for dating young Holocene loess samples.  
        关键词：Holocene loess;Single-aliquot OSL;Equivalent-dose;Pre-heat temperature;Cut-heat temperature   
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        发布时间：2021-03-12
      • ZHANG Keqi CHEN Jie LU Yanchou WANG Changsheng YANG Chuancheng
        Issue 11, (2007)
        摘要：Daybreak 2200 OSL readers are widely used for luminescence dating applications.As the sample irradia- tion and illumination may affect discs in adjacent positions,it is critical to confirm that these factors do not introduce significant systematic errors.Effects of cross-irradiation and cross-bleaching were examined and quantified using fine-grain quartz and highly sensitive CaSO4:Tm dosimeters,and the irradiation offset time was measured.The cross-bleaching effect on adjacent aliquots is non-linear with no more than 15% OSL signal reduction following 10ks illumination with the power of blue LED being at 95% maximum.But at positions other than the nearest neighboring sample,almost no effect of cross-bleaching was found.The cross-talk dose,even to the nearest samples,was about 0.2‰of the applied dose,and it decreased with increasing distance from the source.Offset time of the built-in Beta source shutter is 0.22 s,which can be neglected in regular dating,and leak dose of the source can be ignored as well. Finally,measurement consistency at Position 0.5,10,…and 55 of the sample tray is better than 3% in relative stan- dard deviation.  
        关键词：Luminescence;Daybreak2200 OSL reader;Cross-talk;CaSO4:Tm TLD;Fine-grain quartz   
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        发布时间：2021-03-12
      • TAN Kaixuan HU Eming XIE Yanshi
        Issue 11, (2007)
        摘要：Characters of 2D TL,3D TL and OSL of quartz occurring in Ashele copper deposit,Xinjiang were ana- lyzed.The contrast experiments of TL and OSL of quartz occurring in tuff,Markakuli fault zone,gold deposits and granite pegmatite close to Ashele copper deposit were also conducted.Notable difference was found in TL and OSL of the quartz samples.The 3D TL of quartz samples from Ashele copper deposit have just two TL peaks at 340nm and 405nm at 170℃.However,there was a TL peak at 560—590nm,which is related to hydrothermal genesis,in quartz samples from the gold deposit and fault zone,and there were TL peaks at 476nm and 625nm,which are related to hypogene magmatism,in quartz samples from the granite pegmatite.The luminescence characters of quartz com- bining with the REE analyses suggested that the ore genesis of Ashele copper deposit is different from hydrothermal genetic gold deposit and Ashele copper deposit is an volcanogenic deposit.  
        关键词：Thermoluminescence;Optically stimulated luminescence;Quartz;Ashele copper deposit;Ore genesis   
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        发布时间：2021-03-12
      • TANG Qiang MA Weijiang LIU Xiaowei ZHANG Chunxiang
        Issue 11, (2007)
        摘要：An optically stimulated luminescence fibre dosimeter based on Al2O3 phosphors was developed.The preliminary tests were performed by using continuous wave optically stimulated luminescence （CW-OSL） mode.  
        关键词：Optically stimulated luminescence;Al2O3;Fibre dosimeter   
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        发布时间：2021-03-12
      • XIA Junding~1 WANG Weida~1 MIKE Li~2 XIONG Yingfei~1 1
        Issue 11, (2007)
        摘要：Thermal activation characteristic (TAC) is an important factor in thermoluminescence dating using the pre-dose technique.A correct dating of the Tang Sancai depends to a large extent on the TAC.The experimental re- sults show that the thermal activation temperatures (TAT) of the Tang Sancai from the Luoyang are between 500℃and 650℃,with TAT of most samples being at 550℃or 650℃.This is lower than the typical value found in porce- lain.  
        关键词：Luoyang Tang Sancai;Thermal activation characteristic;Activation temperature   
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        发布时间：2021-03-12
      • WANG Ping~1 YUAN Daoyang~2 LIU Xinwang~2 JIANG Hanchao~3 1
        Issue 11, (2007)
        摘要：In this paper,profile observation and geologic strata structure analysis on the third level terrace at Fan- jiaping on the south bank of the Huanghe River in the Lanzhou basin were reported,and systemically collected sam- ples of fluvial sediments and the overlying diluvium and aeolian loess were analyzed by optically stimulated lumi- nescence (OSL).The granulometric and magnetic susceptibility samples from the fine grain sedimentary layer at the middle of the profile were collected at a 2.5 cm interval.According to simplified multiple aliquot dating on fine grain quartz of 16 optically stimulated luminescence samples and electron spin resonance (ESR) dating of the underlying early fluvial layer,the following chronology results of the strata profile of the third terrace were obtained.The under- lying early fluvial layer is of gravels that belong to Fanjiaping formation in early and middle Pleistogene.The river-bed sedimentation of the Huanghe River started about 80,000 years ago.The accumulation of mainly proluvial sediments started about 70,000 years ago.And the continuous loess accumulation began about 55,000 years ago.The age of formation of the third terrace of Huanghe River was estimated at about 70,000 years,corresponding to the time between the last interglacial period and the last glacial period in the late Pleistocene.  
        关键词：Lanzhou basin;The third terrace of Huanghe river;Simplified multiple aliquot dating on fine grain quartz;Terrace age   
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        发布时间：2021-03-12
      • HAN Kongyan~1 YIN Gongming~1 LIN Min~
        Issue 11, (2007)
        摘要：As aluminum center cannot be completely bleached with a plateau value in the ESR spectra,the residual dose must be subtracted from the equivalent dose in order to obtain the real paleo-dose.Two types of quartz samples extracted from granite and littoral sand were exposed directly to sun-light at four cities of different latitudes in China, in an attempt to study the latitude effect on bleaching results of the Al center ESR signal and to see the dependence of quartz origins.No significant difference was found in samples bleached at different latitudes,but significant differ- ence was found in samples of different sources.For quartz from granite,the bleaching rate is 40% to 50%,while only about 20% for littoral sand.  
        关键词：Sun bleach;Quartz;Aluminum center;ESR dating   
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        发布时间：2021-03-12
      • ZHANG Jiafu ZHOU Liping
        Issue 11, (2007)
        摘要：In the past decades,the luminescence technique has been developed into one of the major dating tools for Quaternary sediments.The latest developments of many different laboratory protocols have made it possible to date samples from nearly all Quaternary sedimentary environments.In this review we introduce the basic principles of the technique,analyze the feasibility of luminescence dating of fault gouges,and summarize its recent developments and applications to dating neotectonic events.  
        关键词：Luminescence dating;Fault gouge;Neotectonic events   
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        发布时间：2021-03-12
      • ZHAO Jianxing XIAO Wuyun TANG Kaiyong ZHU Hongying ZHOU Chunzhi
        Issue 11, (2007)
        摘要：Major reasons of data dispersivity in thermoluminescence dosimetry are analyzed in this paper.GR200A LiF(Mg,Cu,P) TLDs with good uniformity were irradiated and read with RGD3 TLD reader or BG2006 TL reader. The dose readings were compared and analyzed.Methods axe suggested to decrease data dispersivity caused by dif- ferent thermal conduction in the measurements.  
        关键词：Thermoluminescence;Data dispersivity;LiF(Mg,Cu,P);Glow curve   
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        发布时间：2021-03-12
      • ZHENG Gongwang WANG Yi WANG Hui TIAN Zhaoyu
        Issue 11, (2007)
        摘要：Many years’oil and gas exploration with radioactivity indicates that there is anomalous radioactivity in the sediments mantling oil deposits.However,it has not been clear that there is a relationship between the anomalous ra- dioactivity and the oil deposits.In this paper,in order to test the effect of the migration of oil and gas on the redistri- bution and enrichment of radio elements in the sediments covering on oil deposits,indoor simulating experiments on the mechanism of oil and gas exploration with thermoluminescence in superficial sediments were carried out.In the experiments,the redistribution of the elements in the superficial sediments of oil and gas deposits has been observed after excluding the factors of the difference in environmental irradiation,the motion of groundwater,landscape change and the difference in sediment.Based on previous work,the experimental results show that the assumption,"The migration of oil and gas causes radio elements in overlying sediments to redistribute",is right.This provides theoretical and experimental basis for the method of the oil and gas exploration with thermoluminescence of superfi- cial sediments.  
        关键词：Thermoluminescence;Oil and gas exploration;Radiation   
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        发布时间：2021-03-12
      • SUN Qilong~
        Issue 11, (2007)
        摘要：The paper reports the design of a novel electron gun based on photoemission of carbon nanotubes.The electron gun,using the traditional Pierce structure,can generate 6A peak pulse beam current and average beam cur- rent of 12mA when the applied DC voltage is 200kV and the driven laser’s wavelength is 800-850nm.This novel electron gun has the simply structure and high quantum efficiency relative to traditional photocathode electron gun. Additionally the electron gun test platform undergoing was introduced in the paper.The electron performance espe- cially the lifetime and the quantum efficiency of the cathode will be studied thoroughly.  
        关键词：Photoemission;Electron gun;Carbon nanotubes;Quantum efficiency   
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        发布时间：2021-03-12
      • HAO Xufeng ZHOU Ruimin WU Xinfeng ZHOU Fei DENG Bangjun FEI Shunting
        Issue 11, (2007)
        摘要：In this paper,polyethylene terephthalare (PET) membrane irradiated by 2MeV E-beam through a mask and etched oxygenation corrosion to produce template were investigated.Effects of the irradiation dose、corrosion dine and corrosion temperature on the weight loss of irradiated PET were discussed.The results showed that with increasing irradiation dose,corrosion time and corrosion temperature,the corrosion of irradiated PET mem- brane became easier.EB induced microscopic structural modifications and amorphous transformation were investi- gated by means of IR and DSC.It was found that the material underwent chemical degradation through bond breaking, and crystalline structure of the material was gradually destroyed.  
        关键词：Template;PET;Mask;EB etching;Corrode   
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        发布时间：2021-03-12
      • LI Qintao~
        Issue 11, (2007)
        摘要：Carbon nanofiber-tipped-cones with controllable apex angle were fabricated by sputtering graphite with 1.2keV Ar+ ions in different incident angles at room temperature.The density of carbon cones was estimated at 1×109—1×1010/cm2.The cones with carbon nanofiber were oriented to the ion-beam direction.By increasing the incidence from 30°to 60°,the apex angle of cones decreased from 33°to 20°,and the aspect ratio increased from 250nm/150nm to 1200nm/400nm.The decreased apex angle,and the increased aspect ratio and density of the cones, were attributed to decreasing effective diffuse coefficient induced by the ion beam and increasing sputtering yield.By increasing the current density from 200μA/cm2 to 800μA/cm2,the apex angle of cones decreased from 90°to 20°and the height of cones increased from 100nm to 1200nm.The increased dose rate caused by larger current densities of the ion beam should result in the different number of the sputtered atom or cluster,which was considered as reason of the decrement of the apex angle and the increment of the height of cones.  
        关键词：Carbon cone;Apex angle;Ion beam induced   
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        发布时间：2021-03-12
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