黄土样品的BeO制备及AMS测量

英文篇名：BeO preparation and AMS measurement result for loess samples
中文刊名：核技术
英文刊名：Nuclear Techniques
作者：武振坤 ; 周卫健 ; 刘敏 ; 余华贵 ; 潘彩文 ; 孔祥辉 ; 卢雪峰
英文作者：WU Zhenkun1 ; 2 ZHOU Weijian1 ; 2 ; 3 LIU Min2 ; 3 YU Huagui1 ; 2 ; 4 PAN Caiwen2 ; 3 KONG Xianghui1 ; 2 ; 4 LU Xuefeng1 ; 2 ; 3 1( State Key Lab of Loess and Quaternary Geology ; Institute of Earth Environment ; Chinese Academy of Sciences ; Xi’an 710075 ; China)2(Xi’an AMS Center ; Xi’an 710052 ; China)3(Xi’an Jiaotong University ; Xi’an 710049 ; China)4(Graduate University of Chinese Academy of Sciences ; Beiijng 100049 ; China)
中文关键词：黄土 ; BeO ; 加速器质谱(AMS)
英文关键词：Loess ; BeO ; Accelerator mass spectrometer(AMS)
出版日期：2008-06-10
机构：中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安加速器质谱中心,中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安加速器质谱中心,中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,中国科学院地球环境研究所黄土与第四纪地质国家重点实验室西安710075西安加速器质谱中心西安710052,西安710075西安加速器质谱中心西安710052西安交通大学西安710049,西安710052西安交通大学西安710049,西安710075西安加速器质谱中心西安710052中国科学院研究生院北京100049,西安710052西安交通大学西安710049,西安710075西安加速器质谱中心西安710052中国科学院研究生院北京100049,西安710075西安加速器质谱中心西安710052西安交通大学西安710049
年：2008
期：06
出版单位：核技术

摘要

采用常规方法提取黄土-古土壤样品中的10Be,制备BeO样品时,无法有效降低样品中B含量,导致在10BeAMS测量中本底值偏高。本文对BeO制备方法进行了优化。新的制备流程改进了阳离子树脂交换、Be(OH)2转化为BeO的灼烧方式以及实验所采用的仪器设备。在西安加速器质谱仪(Xi’an-AMS)上测试结果表明,采用该化学流程制备的BeO样品化学本底可以达到2.04×10-14。本文还介绍了Xi’an-AMS测量10Be的方法与测量结果。
The classic procedure of BeO preparation for loess-paleosol cannot restrain the concentration of 10B effectively,which results in higher background of 10Be measurement.The procedure has been modified in this paper.It includes detailed eluting curve for cation exchanging,the method of converting Be(OH)2 to BeO,and the experiment equipments.The measurement results by Xi’an AMS indicate that the background of modified BeO preparation procedure can be lowered to 2.04×10-14 on 3MV AMS.The method and measurement results have also been introduced for Xi’an-AMS.

引文

1Lal D.J Annual Review of Earth Planetary Science,1998,16:355–388
    2Lal D,Peters B.Cosmic ray produced radioactivity on the earth.Springer-Verlag,Berlin,1967.551–612
    3陈文寄,计凤桔,王非.年轻地质体系的年代测定(续).北京:地震出版社,1999CHEN Wenji,JI Fengju,WANG Fei.Dating of young geological bodies(continued)-new methods and progresses.Beijing:Seismological Publishing House,1999
    4Lal D.Earth Planet Sci Lett,1991,104:424–439
    5Gosse J C,Phillips F M.Quaternary Science Reviews,2001,20:1475–1560
    6Nishizumi K,Kohl C P,Arnold J R,et al.J Geophys Res,1989,94:17,907–917,915
    7Brown E T,Edmond J M,Raisbeck G M,et al.Geochimica et Cosmochimica Acta,1991,55:2269–2283
    8Aldahan A,Possnert G.Nucl Instr Meth,2000,B172:513–517
    9Wagner G,Masarik J,Beer J,et al.Nucl Instr Meth,2000,B172:597–604
    10Shen C D,Beer J,Kubik P W,et al.Nucl Instr Meth,2004,B223/224:613–617
    11Shen C D,Beer J,Liu T,et al.Earth and Planetary Science Letters,1992,109:169–177
    12Shen C D,Beer J,Heller F,et al.Nucl Instr Meth,2000,B172:551–554
    13Heller F,Shen C D,Beer J,et al.Earth Planet Sci Lett,1993,114:385–390
    14Beer J,Shen C D,Heller F,et al.Geophy Res Lett,1993,20:57–60
    15Gu Z Y,Lal D,Liu T S,et al.Geochim Cosmochim Acta,1997,61:5221–5231
    16Zhou W,Priller A,Beck J W,et al.Radiocarbin,2007,49:139–160
    17沈承德,刘东生,Beer J,等.中国科学,1989,B7:744–751Shen C D,Liu T.S.,Beer J.et al.Science in China,1989,B7:744–751
    18周卫健,卢雪峰,武振坤,等.核技术,2007,30:702–708ZHOU Weijian,LU Xuefeng,WU Zhenkun,et al.Nucl Tech,2007,30:702–708
    19Raisbeck G M,Yiou F,Bourles D,et al.Nucl Instr Meth,1987,B29:22–26
    20Klein J,Middleton R,Tang H.Nucl Instr Meth,1982,B193:601–616
    21Southon J R,Vogel J S,Nowikow I,et al.Nucl Instr Meth,1983,B205:251–257
    22Priller A,Brandl T,Golser R,et al.Nucl Instr Meth,2000,B172:100–106
    23ZHOU W,ZHAO X,LU X,et al.Radiocarbon,2006,48:285–293
    24Raisbeck G M,Yiou F,Bourles D,et al.Nucl Instr Meth,1984,B5:175–178
    25武振坤.最近13万年以来黄土高原中部高分辨率的10Be记录与东亚季风变迁史,博士论文,中国科学院地球环境研究所,2004WU Zhenkun.High resolution10Be record from the middle part of Loess Plateau and the reconstruction of East Asian monsoon history over the last130ka,PHD thesis,Institute of Earth Environment,Chinese Academy of Sciences,2004