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Kieck T, Biebricher S, Düllmann CE, Wendt K. Optimization of a laser ion source for 163Ho isotope separation. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:053304. [PMID: 31153223 DOI: 10.1063/1.5081094] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 05/01/2019] [Indexed: 06/09/2023]
Abstract
To measure the mass of the electron neutrino, the "Electron Capture in Holmium-163" (ECHo) collaboration aims at calorimetrically measuring the spectrum following electron capture in 163Ho. The success of the ECHo experiment depends critically on the radiochemical purity of the 163Ho sample, which is ion-implanted into the calorimeters. For this, a 30 kV high transmission magnetic mass separator equipped with a resonance ionization laser ion source is used. To meet the ECHo requirements, the ion source unit was optimized with respect to its thermal characteristics and material composition by means of the finite element method thermal-electric calculations and chemical equilibrium simulation using the Gibbs energy minimization method. The new setup provides an improved selectivity of laser ionization vs interfering surface ionization of 2700(500) and an overall efficiency of 41(5)% for the ion-implantation process.
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Affiliation(s)
- Tom Kieck
- Institute of Nuclear Chemistry, Johannes Gutenberg University, 55128 Mainz, Germany
| | | | - Christoph E Düllmann
- Institute of Nuclear Chemistry, Johannes Gutenberg University, 55128 Mainz, Germany
| | - Klaus Wendt
- Institute of Physics, Johannes Gutenberg University, 55128 Mainz, Germany
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Heinitz S, Kivel N, Schumann D, Köster U, Balata M, Biasotti M, Ceriale V, De Gerone M, Faverzani M, Ferri E, Gallucci G, Gatti F, Giachero A, Nisi S, Nucciotti A, Orlando A, Pessina G, Puiu A, Ragazzi S. Production and separation of 163Ho for nuclear physics experiments. PLoS One 2018; 13:e0200910. [PMID: 30133443 PMCID: PMC6104913 DOI: 10.1371/journal.pone.0200910] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/03/2018] [Indexed: 11/19/2022] Open
Abstract
This paper describes the production and chemical separation of the 163Ho isotope that will be used in several nuclear physics experiments aiming at measuring the neutrino mass as well as the neutron cross section of the 163Ho isotope. For this purpose, several batches of enriched 162Er have been irradiated at the Institut Laue-Langevin high flux reactor to finally produce 6 mg or 100 MBq of the desired 163Ho isotope. A portion of the Er/Ho mixture is then subjected to a sophisticated chemical separation involving ion exchange chromatography to isolate the Ho product from the Er target material. Before irradiation, a thorough analysis of the impurity content was performed and its implication on the produced nuclide inventory will be discussed.
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Affiliation(s)
- S. Heinitz
- Nuclear Energy and Safety Department, Paul Scherrer Institut, Villigen, Switzerland
- * E-mail:
| | - N. Kivel
- Nuclear Energy and Safety Department, Paul Scherrer Institut, Villigen, Switzerland
| | - D. Schumann
- Nuclear Energy and Safety Department, Paul Scherrer Institut, Villigen, Switzerland
| | - U. Köster
- Institut Laue-Langevin, Grenoble, France
| | - M. Balata
- Laboratori Nazionali del Gran Sasso, Assergi, Italy
| | - M. Biasotti
- Dipartimento di Fisica, Universita di Genova, Genova, Italy
- Istituto Nazionale di Fisica Nucleare Genova, Genova, Italy
| | - V. Ceriale
- Istituto Nazionale di Fisica Nucleare Genova, Genova, Italy
| | - M. De Gerone
- Istituto Nazionale di Fisica Nucleare Genova, Genova, Italy
| | - M. Faverzani
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - E. Ferri
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - G. Gallucci
- Istituto Nazionale di Fisica Nucleare Genova, Genova, Italy
| | - F. Gatti
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - A. Giachero
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - S. Nisi
- Laboratori Nazionali del Gran Sasso, Assergi, Italy
| | - A. Nucciotti
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - A. Orlando
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
| | - G. Pessina
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - A. Puiu
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
| | - S. Ragazzi
- Dipartimento di Fisica, Universita di Milano-Bicocca, Milano, Italy
- Istituto Nazionale de Fisica Nucleare, Milano, Italy
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