Measurement of the 230U half-life

被引:15
作者
Pomme, S. [1 ]
Altzitzoglou, T. [1 ]
Van Ammel, R. [1 ]
Suliman, G. [1 ]
Marouli, M. [1 ]
Jobbagy, V. [1 ]
Paepen, J. [1 ]
Stroh, H. [1 ]
Apostolidis, C. [2 ]
Abbas, K. [3 ]
Morgenstern, A. [2 ]
机构
[1] European Commiss, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium
[2] European Commiss, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany
[3] European Commiss, Joint Res Ctr, Inst Hlth & Consumer Protect, I-21020 Ispra, VA, Italy
关键词
Half-life; U-230; Radionuclide metrology; Nuclear data; Radiotherapy; TARGETED ALPHA THERAPY; PRIMARY STANDARDIZATION;
D O I
10.1016/j.apradiso.2012.02.053
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The U-230 half-life was determined by measuring the decay curve of U-230 sources by various nuclear detection techniques: alpha-particle counting at a defined small solid angle; 4 pi alpha+beta counting with a windowless CsI sandwich spectrometer, a liquid scintillation counter and a pressurised proportional counter; gamma-ray spectrometry with a HPGe detector and nearly-2 pi alpha-particle counting with an ion-implanted silicon detector. Depending on the technique, the decay was followed for 100-200 d, which is 5-10 times the U-230 half-life. The measurement results of the various techniques were in good mutual agreement. The mean value, T-1/2(U-230)=20.23 (2) d, is lower than the literature value which is based on one measurement in 1948 and resulted in a half-life value of 20.8 d without statement of uncertainty. A correction for the ingrowth of the long-lived Pb-210 and its daughter products may have been overlooked in the past. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1900 / 1906
页数:7
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