Measurement of the 54Mn half-life

被引：15

作者：

Van Ammel, R. ^{[1
]}

Paepen, J. ^{[1
]}

Pomme, S. ^{[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 | 2010年 / 68卷 / 12期

关键词：

Half-life; Mn-54; Radionuclide metrology; Nuclear data; Quality control; LIVES; UNCERTAINTY; CE-144;

D O I：

10.1016/j.apradiso.2010.06.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The half-life of Mn-54 was measured by following the decay of sources from a radiochemically pure solution using three different measuring systems: an ionisation chamber, a high-purity germanium (HPGe) detector and two 7.5 cm (diameter) x 7 5 cm (height) NaI(Tl) scintillation detectors in opposite position. The measurements were performed over a period of 3 years, i.e. about 3.5 half-lives of Mn-54 The resulting half-life values and detailed uncertainty budgets are presented for the three measuring systems. The half-life obtained with the ionisation chamber, 312 32 (9) days, is consistent with but more precise than the ones obtained with the HPGe detector, 311.9 (5) days and the NaI(Tl) detectors, 311.9 (6) days, respectively. Our final half-life value of 312.32 (9) days is rather consistent with the currently recommended values of 312.29 (26) (IAEA, 2007) and 312.13 (3) days (Helmer and Schonfeld, 2004), even though the uncertainty of the latter may be underestimated. From a partially weighted mean (Pomme and Spasova, 2008) of selected experimental values published after 1970, a new best estimate of T-1/2(Mn-54)=312.20 (8) days was calculated (c) 2010 Elsevier Ltd. All rights reserved

引用

页码：2387 / 2392

页数：6

共 37 条

[1]

ANSPACH SC, 1965, NBS MISC PUBL, P260

[2] HALF-LIVES OF MN-52 AND MN-54 [J].