Isolation of Ho-163 for Neutrino Mass Measurements
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File Size : 15,77 MB
Release : 2014
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File Size : 15,77 MB
Release : 2014
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Page : 18 pages
File Size : 28,42 MB
Release : 2015
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The rare earth isotope 163Ho is of interest for neutrino mass measurements. This report describes the isolation of 163Ho from a proton-irradiated dysprosium target and its purification. A Dy metal target was irradiated with 16 MeV protons for 10 h. After target dissolution, 163Ho was separated from the bulk Dy via cation-exchange high performance liquid chromatography using 70 mmol dm-3 [alpha]-hydroxyisobutyric acid as the mobile phase. Subsequent purification of the collected Ho fraction was performed to remove the [alpha]-hydroxyisobutyrate chelating agent and to concentrate the Ho in a low ionic strength aqueous matrix. The final solution was characterized by MC-ICP-MS to determine the 163Ho/165Ho ratio, 163Ho and the residual Dy content. The HPLC purification process resulted in a decontamination factor 1.4E5 for Dy. As a result, the isolated Ho fraction contained 24.8 ±1.3 ng of 163Ho corresponding to holmium recovery of 72 ± 3%.
Author : Thomas Ferbel
Publisher : Springer Science & Business Media
Page : 439 pages
File Size : 17,90 MB
Release : 2012-12-06
Category : Science
ISBN : 1468450182
The third Advanced Study Institute (ASI) on Techniques and Concepts of High Energy Physics was held at the Hotel on the Cay, in the scenic harbor of Christiansted, St. Croix, U. S. Virgin Islands. Christiansted was the site of the first ASI, and it was certainly a delight to return there again. As in the previous ASI's, the aim was to bring together a small group of promising young experimenters and several outstanding senior scholars in experimental and theoretical high energy physics in order to learn about the latest developments in the field and to strengthen contacts among scientists from different countries and different backgrounds. The institute was both a great scientific and a great social success; much of this was due to the beautiful setting and to the dedication of the Hotel management of Ray Boudreau and Hurchell Greenaway and their excellent staff. The primary support for the meeting was once again provided by the Scientific Affairs Division of NATO. The ASI was cosponsored by the U. S. Department of Energy, by Fermilab, by the National Science Found ation, and by the University of Rochester. A special contribution from the Oliver S. and Jennie R. Donaldson Charitable Trust provided an important degree of flexibility, as well as support for worthy students from developing nations. As in the case of the previous ASI's, the scientific program was designed for advanced graduate students and recent PhD recipients in experimental particle physics.
Author : H. Maezawa
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Page : 134 pages
File Size : 47,64 MB
Release : 1996
Category : Electrons
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Author : S. Yasumi
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Page : 16 pages
File Size : 44,59 MB
Release : 1993
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Author : Sven Kullander
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Page : 12 pages
File Size : 35,65 MB
Release : 1983
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Author : Paul Thomas Springer
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Page : 474 pages
File Size : 47,60 MB
Release : 1985
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Page : 1200 pages
File Size : 18,29 MB
Release : 1986
Category : Power resources
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Page : 786 pages
File Size : 38,74 MB
Release : 1990
Category : Nuclear physics
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Author : David G. Cassel
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Page : 968 pages
File Size : 37,87 MB
Release : 1983
Category : Hadrons
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