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Essex RM, Mann JL, Collé R, Laureano-Perez L, Bennett ME, Dion H, Fitzgerald R, Gaffney AM, Gourgiotis A, Hubert A, Inn KGW, Kinman WS, Lamont SP, Steiner R, Williams RW. New determination of the 229Th half-life. J Radioanal Nucl Chem 2018; 318. [DOI: 10.1007/s10967-018-6032-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Essex RM, Mann JL, Williams RW, Kinman WS, Hubert A, Bennett ME, Gourgiotis A. A new thorium-229 reference material. Appl Radiat Isot 2018; 134:23-31. [PMID: 28784354 DOI: 10.1016/j.apradiso.2017.07.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 07/21/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
Abstract
A new reference material was characterized for 229Th molality and thorium isotope amount ratios. This reference material is intended for use in nuclear forensic analyses as an isotope dilution mass spectrometry spike. The reference material value and expanded uncertainty (k = 2) for the 229Th molality is (1.1498 ± 0.0016) × 10-10molg-1 solution. The value and expanded uncertainty (k = 2) for the n(230Th)/n(229Th) ratio is (5.18 ± 0.26) × 10-5 and the n(232Th)/n(229Th) ratio is (3.815 ± 0.092) × 10-4.
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Affiliation(s)
- Richard M Essex
- National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8462, Gaithersburg, MD 20899, USA.
| | - Jaqueline L Mann
- National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8462, Gaithersburg, MD 20899, USA
| | - Ross W Williams
- Lawrence Livermore National Laboratory, P.O. Box 808, L-231, Livermore, CA 94551-0808, USA
| | - William S Kinman
- Los Alamos National Laboratory, Actinide Analytical Chemistry Division, Los Alamos, NM 87545, USA
| | - Amélie Hubert
- CEA/DAM-Ile de France, Bruyères-le-Châtel, 91297 Arpajon Cedex, France
| | - Megan E Bennett
- Argonne National Laboratory, Analytical Chemistry Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, USA
| | - Alkiviadis Gourgiotis
- Univ Paris Diderot, Sorbonne Paris Cite, Institut de Physique du Globe de Paris, UMR CNRS 7154, F-75238 Paris, France
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Suzuki-Muresan T, Perrigaud K, Vandenborre J, Ribet S, Takamasa I, Grambow B. Assessment of surface reactivity of thorium oxide in conditions close to chemical equilibrium by isotope exchange 229Th/ 232Th method. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2016-2651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This work aims to assess the solubility and the surface reactivity of crystallized thorium at pH 3.0 in presence of three types of solids: synthesized powder at 1300°C, crushed kernel, and intact kernel. In this study, the kernel is composed by the core solid from high temperature reactors (HTR) sphere particles. The originality of this work consisted in following in a sequential order the kinetic of dissolution, the surface reactivity in presence of isotope tracer 229Th, and its desorption process. Long time experiments (634 days) allowed to get deeper understanding on the behavior of the surface reactivity in contact with the solution. Solubility values are ranging from 0.3×10−7 mol·L−1 to 3×10−7 mol·L−1 with a dissolution rate of 10−6–10−4 g·m−2 day−1. PHREEQC modeling showed that crystallized ThO2(cr, 20 nm) phase controls the equilibrium in solution. Isotope exchange between 229Th and 232Th indicated that well-crystallized phase exist as an inert surface regarding to the absence of exchange between surface solid and solution.
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Affiliation(s)
- Tomo Suzuki-Muresan
- SUBATECH, Unité Mixte de Recherche 6457, École des Mines de Nantes, CNRS/IN2P3 , Université de Nantes , BP 20722, 44307 Nantes cedex 3, France , Phone: (+33) 2 51 85 86 71, Fax: (+33) 2 51 85 84 52
| | - Katy Perrigaud
- SUBATECH, Unité Mixte de Recherche 6457, École des Mines de Nantes, CNRS/IN2P3 , Université de Nantes , BP 20722 , 44307 Nantes cedex 3, France
| | - Johan Vandenborre
- SUBATECH, Unité Mixte de Recherche 6457, École des Mines de Nantes, CNRS/IN2P3 , Université de Nantes , BP 20722 , 44307 Nantes cedex 3, France
| | - Solange Ribet
- SUBATECH, Unité Mixte de Recherche 6457, École des Mines de Nantes, CNRS/IN2P3 , Université de Nantes , BP 20722 , 44307 Nantes cedex 3, France
| | - Inai Takamasa
- TOKAI University , 4-1-1 Kitakaname, Hiratsuka-shi , Kanagawa , 259-1292, Japan
| | - Bernd Grambow
- SUBATECH, Unité Mixte de Recherche 6457, École des Mines de Nantes, CNRS/IN2P3 , Université de Nantes , BP 20722 , 44307 Nantes cedex 3, France
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Dixon P, Curtis DB, Musgrave J, Roensch F, Roach J, Rokop D. Analysis of Naturally Produced Technetium and Plutonium in Geologic Materials. Anal Chem 1997; 69:1692-9. [DOI: 10.1021/ac961159q] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul Dixon
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
| | - David B. Curtis
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
| | - John Musgrave
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
| | - Fred Roensch
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
| | - Jeff Roach
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
| | - Don Rokop
- Isotope and Nuclear Chemistry Division, Los Alamos National Laboratory, Mail Stop J-514, Los Alamos, New Mexico 87545
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