New determination of the 229Th half-life

被引：3

作者：

Essex, Richard M. ^{[1
]}

Mann, Jacqueline L. ^{[1
]}

Colle, Ronald ^{[1
]}

Laureano-Perez, Lizbeth ^{[1
]}

Bennett, Megan E. ^{[2
]}

Dion, Heather ^{[3
]}

Fitzgerald, Ryan ^{[1
]}

Gaffney, Amy M. ^{[4
]}

Gourgiotis, Alkiviadis ^{[5
]}

Hubert, Amelie ^{[6
]}

Inn, Kenneth G. W. ^{[7
]}

Kinman, William S. ^{[3
]}

Lamont, Stephen P. ^{[3
]}

Steiner, Robert ^{[3
]}

Williams, Ross W. ^{[4
]}

机构：

[1] NIST, 100 Bur Dr,Mail Stop 8462, Gaithersburg, MD 20899 USA

[2] Shine Med Technol, 101 East Milwaukee St, Janesville, WI 53545 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Lawrence Livermore Natl Lab, POB 808,L-231, Livermore, CA 94551 USA

[5] IRSN, PSE ENV SEDRE LELI, 31 Ave Div Leclerc, Fontenay Aux Roses, France

[6] CEA DAM Ile France, F-91297 Bruyeres Le Chatel, Arpajon, France

[7] K&E Innovat, Ewa Beach, HI 96706 USA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2018年 / 318卷 / 01期

关键词：

Th-229; Half-life; Liquid scintillation counting; NaI counting; Isotope dilution alpha spectrometry;

D O I：

10.1007/s10967-018-6032-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new determination of the Th-229 half-life was made based on measurements of the Th-229 massic activity of a high-purity solution for which the Th-229 molality had previously been measured. The Th-229 massic activity was measured by direct comparison with SRM 4328C using 4 pi alpha beta liquid scintillation counting, NaI counting, and standard addition liquid scintillation counting. The massic activity was confirmed by isotope dilution alpha spectrometry measurements. The calculated Th-229 half-life is (7825 +/- 87) years (k = 2), which is shorter than the three most recent half-life determinations but is consistent with these values within uncertainties.

引用

页码：515 / 525

页数：11

共 50 条

[1] New determination of the 229Th half-life
Richard M. Essex
Jacqueline L. Mann
Ronald Collé
Lizbeth Laureano-Perez
Megan E. Bennett
Heather Dion
Ryan Fitzgerald
Amy M. Gaffney
Alkiviadis Gourgiotis
Amélie Hubert
Kenneth G. W. Inn
William S. Kinman
Stephen P. Lamont
Robert Steiner
Ross W. Williams
[J]. Journal of Radioanalytical and Nuclear Chemistry, 2018, 318 : 515 - 525
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