Improved measurement of the 44Ti half-life from a 14-year long study

被引：61

作者：

Ahmad, I. ^{[1
]}

Greene, J. P.

Moore, E. F.

Ghelberg, S.

Ofan, A.

Paul, M.

Kutschera, W.

机构：

[1] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[2] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[3] Univ Vienna, VERA, Inst Isotopenforsch & Kernphys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW C | 2006年 / 74卷 / 06期

关键词：

D O I：

10.1103/PhysRevC.74.065803

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The half-life of Ti-44 was determined by following the decay of Ti-44 and Co-60 for 14 yr. Mixed sources containing Ti-44 and Co-60 and pure sources of Ti-44 and Co-60 were prepared and their gamma-ray spectra were measured with a Ge spectrometer once or twice a year. Counts in the 1157.0-keV gamma-ray photopeak of Ti-44 and the 1173.2- and 1332.5-keV gamma-ray photopeaks of Co-60 were used for this measurement. From the decay of the Ti-44 and Co-60 activity ratios, the half-life of Ti-44 was determined. Using a value of 5.2711 +/- 0.0004 yr for Co-60 half-life, we determined the half-life of Ti-44 as 58.9 +/- 0.3 yr. Special efforts were made to check for systematic errors and these were found to be negligible within the quoted uncertainty.

引用

页数：8

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