Measurement of the 109Cd half-life

被引：12

作者：

Van Ammel, R. ^{[1
]}

Pomme, S. ^{[1
]}

Paepen, J. ^{[1
]}

Sibbens, G. ^{[1
]}

机构：

[1] Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium

来源：

APPLIED RADIATION AND ISOTOPES | 2011年 / 69卷 / 05期

关键词：

Half-life; Cd-109; Radionuclide metrology; Nuclear data; Quality control; DEAD-TIME; LIVES; RADIONUCLIDES; UNCERTAINTY; CO-57;

D O I：

10.1016/j.apradiso.2011.01.020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The half-life of Cd-109 was measured by following the decay of sources from a radiochemically pure solution with two different measuring systems: an ionisation chamber and a high-purity germanium (HPGe) detector. The measurements were performed over a period of 3.6 years, i.e. about 2.8 half-lives of Cd-109. The resulting half-life values and detailed uncertainty budgets (k=1) are presented for both systems. The result obtained with the ionisation chamber. 462.36 (33) days, and the one obtained with the HPGe detector, 461.92 (76) days, are mutually consistent. The weighted mean of our measured values. T-1/2(Cd-109)= 462.29 (30)days. is consistent with the currently recommended values of 461.4 (12) days (Schonfeld and Dersch, 2004; IAEA, 2007) and 462.0 (3) days (Xiaolong et al., 2010). From a set of selected experimental values published after 1970. a "partially weighted mean" (Pomme and Spasova, 2008) of T-1/2(Cd-109)=462.36 (39) days was calculated. More measurements are needed to resolve the discrepancies among literature data and to reduce the final uncertainty on the Cd-109 half-life. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：785 / 789

页数：5

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