Variation measurements of decay constants of Tc-99m as a chemical tracer

Tc-99m作为化学示踪剂的衰变常数的变化测量

• 批准号: 24740136
• 负责人: KIKUNAGA Hidetoshi
• 金额: $ 2.75万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740136/
• 关键词: 半減期測定; 壊変定数; 化学効果; テクネチウム; クロム

The decay constants of some nuclides which decay via the internal conversion and electron capture process are changed with changing environmental factors such as its chemical states. Examples of this type of nuclides are metastable state of Tc-99 (Tc-99m) and Cr-51. There is a possibility that the variation measurement of the decay constants with radiation detection is able to use as a chemical tracer.In this study, an apparatus for precise measurement of the decay constants was developed at first. The decay constants of these nuclides were precisely measured with various chemical states to investigate the effects of chemical states on the decay constants of nuclides. In the case of Cr-51, the relative differences of the decay constant between chemical states of Cr-51 were compared with a simple theoretical model.

通过内部转换和电子捕获过程衰减的某些核素的衰减常数随着环境因素（例如其化学状态）的变化而改变。这种类型的核素的例子是TC-99（TC-99M）和CR-51的亚稳态。通过辐射检测的衰减常数的变化测量可能能够用作化学示踪剂。在这项研究中，首先开发了用于精确测量衰减常数的一种设备。精确地用各种化学态测量了这些核素的衰减常数，以研究化学态对核素衰减常数的影响。在CR-51的情况下，将CR-51化学状态之间衰减常数的相对差异与简单的理论模型进行了比较。

项目成果

Comparison of the decay constants of 51Cr with various valence states

不同价态51Cr的衰变常数比较

• 发表时间: 2013
• 作者: H. Kikunaga et al.