地震地质 ›› 2006, Vol. 28 ›› Issue (4): 663-667.

• 新技术应用 • 上一篇    下一篇

液闪法测量断裂带水中3H计数效率的标定

尹金辉, 郑勇刚, 刘粤霞   

  1. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京, 100029
  • 收稿日期:2006-06-11 修回日期:2006-09-19 出版日期:2006-12-21 发布日期:2009-08-27
  • 作者简介:尹金辉,男,1969年生,1992年于中国地震局地质研究所获硕士学位,地球化学专业,副研究员,主要从事第四纪地质年代学的研究工作,电话:010-62009015,E-mail:yjhdzs@hotmail.com.
  • 基金资助:
    国家发展与改革委员会发改投资“城市活断层试验探测”项目(20041138)资助

THE QUENCHING CALIBRATION FOR TRITIUM DETERMINATION FROM FAULT ZONE BY LIQUID SCINTILLATION METHOD

YIN Jin-hui, ZHENG Yong-gang, LIU Yue-xia   

  1. Institute of Geology, CEA, State Key Laboratory of Earthquake Dynamics, Beijing 100029, China
  • Received:2006-06-11 Revised:2006-09-19 Online:2006-12-21 Published:2009-08-27

摘要: 文中介绍了如何使用无氚水作为猝灭剂制备系列猝灭源,建立猝灭校正曲线,从而精确标定Quantulus 1220液闪仪测量3H的计数效率.实验结果表明,直线拟合校正曲线计算的效率与测量值的偏差小,计数效率变动范围在21.9%~22.68%之间,系列猝灭源刻度仪器计数效率具有快速可靠等优点.

关键词: SQP(E)猝灭校正, 氚活度测量, 氚探测效率

Abstract: This paper introduces a simple and practical way to construct quenching calibration curve for tritium DPM measurements basing on efficiencies of a series of known activity standard sources and quenching parameter SQP(E)used to define the quench level in Quantulus 1220.Ten standard sources and two test samples were prepared with tritium-free water as quenching materials and progressively added to Hisafe 3 cocktail.A linear curve or polynomial function curve was fitted with each pair of quench parameter SQP(E)and efficiency of standard source.The test sample demonstrated that the error of linear curve was small within routine quenching range of 776 to 785.Therefore,the quenching calibration curve can be beneficial to improving accuracy and reliability of tritium counting.

Key words: SQP(E)quenching calibration, tritium activity measurement, tritium detecting efficiency

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