Production, isolation and characterization of radiochemically pure 163Ho samples for the ECHo-project

Publication type:
Journal article
Metadata:
Autoren
  • Holger Dorrer
  • Katerina Chrysalidis
  • Thomas Day Goodacre
  • Christoph E Duellmann
  • Klaus Eberhardt
  • Christian Enss
  • Loredana Gastaldo
  • Raphael Haas
  • Jonathan Harding
  • Clemens Hassel
  • Karl Johnston
  • Tom Kieck
  • Ulli Koster
  • Bruce Marsh
  • Christoph Mokry
  • Sebastian Rothe
  • Joerg Runke
  • Fabian Schneider
  • Thierry Stora
  • Andreas Turler
  • Klaus Wendt
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000437007000001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1515/ract-2017-2877
Externe Identifier
  • Clarivate Analytics Document Solution ID: GL3DA
ISSN
0033-8230
Ausgabe der Veröffentlichung
7
Zeitschrift
RADIOCHIMICA ACTA
Schlüsselwörter
  • Neutrino mass determination
  • Ho-163
  • neutron activation
  • lanthanide separation
  • extraction chromatography
Paginierung
535 - 547
Datum der Veröffentlichung
2018
Status
Published
Titel
Production, isolation and characterization of radiochemically pure <SUP>163</SUP>Ho samples for the ECHo-project
Sub types
  • Article
Ausgabe der Zeitschrift
106

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:title>Abstract</jats:title> <jats:p>Several experiments on the study of the electron neutrino mass are based on high-statistics measurements of the energy spectrum following electron capture of the radionuclide <jats:sup>163</jats:sup>Ho. They rely on the availability of large, radiochemically pure samples of <jats:sup>163</jats:sup>Ho. Here, we describe the production, separation, characterization, and sample production within the Electron Capture in Holmium-163 (ECHo) project. <jats:sup>163</jats:sup>Ho has been produced by thermal neutron activation of enriched, prepurified <jats:sup>162</jats:sup>Er targets in the high flux reactor of the Institut Laue-Langevin, Grenoble, France, in irradiations lasting up to 54 days. Irradiated targets were chemically processed by means of extraction chromatography, which allowed separating the formed Ho from the <jats:sup>162</jats:sup>Er target-material and from the main byproducts <jats:sup>170</jats:sup>Tm and <jats:sup>171</jats:sup>Tm, which are co-produced in GBq amounts. Decontamination factors of &gt;500 for Er and of &gt;10<jats:sup>5</jats:sup> for Tm and yields of 3.6·10<jats:sup>16</jats:sup> and 1.2·10<jats:sup>18</jats:sup> atoms of <jats:sup>163</jats:sup>Ho were obtained, corresponding to a recovery yield of 95 % of Ho in the chemical separation. The Ho-fraction was characterized by means of γ-ray spectrometry, Inductively-Coupled-Plasma Mass Spectrometry (ICP-MS), Resonance Ionization Mass Spectrometry (RIMS) and Neutron Activation Analysis (NAA). In this process, the thermal neutron capture cross section of <jats:sup>163</jats:sup>Ho was measured to σ<jats:sub>Ho-163 to Ho-164m</jats:sub>= (23±3) b and σ<jats:sub>Ho-163 to Ho-164g</jats:sub>= (156±9) b for the formation of the two isomers of <jats:sup>164</jats:sup>Ho. Specific samples were produced for further purification by mass separation to isolate <jats:sup>163</jats:sup>Ho from the Ho-isotope mixture, as needed for obtaining the energy spectrum within ECHo. The partial efficiency for this second separation step is (32±5) %.</jats:p>
Autoren
  • Holger Dorrer
  • Katerina Chrysalidis
  • Thomas Day Goodacre
  • Christoph E Düllmann
  • Klaus Eberhardt
  • Christian Enss
  • Loredana Gastaldo
  • Raphael Haas
  • Jonathan Harding
  • Clemens Hassel
  • Karl Johnston
  • Tom Kieck
  • Ulli Köster
  • Bruce Marsh
  • Christoph Mokry
  • Sebastian Rothe
  • Jörg Runke
  • Fabian Schneider
  • Thierry Stora
  • Andreas Türler
  • Klaus Wendt
DOI
10.1515/ract-2017-2877
eISSN
2193-3405
ISSN
0033-8230
Ausgabe der Veröffentlichung
7
Zeitschrift
Radiochimica Acta
Sprache
en
Online publication date
2018
Paginierung
535 - 547
Datum der Veröffentlichung
2018
Status
Published
Herausgeber
Walter de Gruyter GmbH
Herausgeber URL
http://dx.doi.org/10.1515/ract-2017-2877
Datum der Datenerfassung
2021
Titel
Production, isolation and characterization of radiochemically pure <sup>163</sup>Ho samples for the ECHo-project
Ausgabe der Zeitschrift
106

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