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在用核试验散落核素~(137)Cs等作时标进行水体沉积物计年断代的测定研究中,有时会发现用作为时标的核素在沉积物中发生了不容忽视的纵深迁移。如果不作校正,会使得与沉积物断代时间座标有关的研究产生不容忽视的误差或错误。为了纠正或校正这种误差,结合我们的研究工作实际,提出了一个用于校正~(137)Cs在水体沉积物中纵向迁移的数学模型。文中描述了该数学模型,并对求解方法作了介绍,还给了一个应用实例。
In the determination of chronological dating of water sediments by time-stamped nuclear isotope 137 Cs, it is sometimes found that the nuclide used as a time scale undergoes an in-depth migration that can not be neglected in sediments. If left uncorrected, it can lead to errors or mistakes that can not be ignored in studies related to the dating of sediments. In order to correct or correct this error, a mathematical model for correcting the longitudinal migration of ~ (137) Cs in the sediments of water bodies is proposed based on our research work. The mathematical model is described in this paper, and the solution method is introduced. An application example is also given.