title: Error-control and processes optimization of (223/224)Ra measurement using Delayed Coincidence Counter (RaDeCC).
abstract: RaDeCC has proved to be a precise and standard way to measure (224)Ra and (223)Ra in water samples and successfully made radium a tracer of several environmental processes. In this paper, the relative errors of (224)Ra and (223)Ra measurement in water samples via a Radium Delayed Coincidence Count system are analyzed through performing coincidence correction calculations and error propagation. The calculated relative errors range of 2.6% ∼ 10.6% for (224)Ra and 9.6% ∼ 14.2% for (223)Ra. For different radium activities, effects of decay days and counting time on final radium relative errors are evaluated and the results show that these relative errors can decrease by adjusting the two measurement factors. Finally, to minimize propagated errors in Radium activity, a set of optimized RaDeCC measurement parameters are proposed.
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Mingminwei Building 405, 94 Weijin Road, Nankai District, Tianjin, China. Electronic address: cxq_0106@163.com.
authors.forename: Cheng
authors.initials: C
authors.lastname: Xiaoqing
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Mingminwei Building 405, 94 Weijin Road, Nankai District, Tianjin, China. Electronic address: yilixin@nankai.edu.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Lixin
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Mingminwei Building 405, 94 Weijin Road, Nankai District, Tianjin, China. Electronic address: 1liulingling@mail.nankai.edu.cn.
authors.forename: Liu
authors.initials: L
authors.lastname: Lingling
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Mingminwei Building 405, 94 Weijin Road, Nankai District, Tianjin, China. Electronic address: tangguoqiang0220@mail.nankai.edu.cn.
authors.forename: Tang
authors.initials: T
authors.lastname: Guoqiang
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Mingminwei Building 405, 94 Weijin Road, Nankai District, Tianjin, China. Electronic address: mabo@mail.nankai.edu.cn.
authors.forename: Wang
authors.initials: W
authors.lastname: Zhidong
mesh_terms: D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods*; D011883:Radium / Q000032:analysis*; D012588:Scintillation Counting / Q000295:instrumentation / Q000379:methods*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D011883:Radium
keywords: (223/224)Ra measurement; Optimized RaDeCC measurement parameter; RaDeCC; Relative error