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Erlangen 2018 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 2: Laser Assisted Mass Spectrometry

MS 2.1: Invited Talk

Monday, March 5, 2018, 14:00–14:30, R 1.020

Production, Separation and Implantation of 163Ho for Neutrino Mass Measurements — •Tom Kieck1, Holger Dorrer1, Christoph E. Düllmann1,2, Klaus Eberhardt1, Lisa Gamer3, Christian Enss3, Loredana Gastaldo3, Clemens Hassel3, Ulli Köster4, Christoph Mokry1, Jörg Runke1,2, Andreas Türler5, and Klaus Wendt11JGU, Mainz, Germany — 2GSI, Darmstadt, Germany — 3Heidelberg University, Heidelberg, Germany — 4ILL, Grenoble, France — 5PSI, Villigen and University of Bern, Bern, Switzerland

The ECHo collaboration aims at measuring the electron neutrino mass by recording the spectrum following electron capture of 163Ho using metallic magnetic calorimeters (MMCs). The radioisotope 163Ho is produced from enriched 162Er in the ILL high flux nuclear reactor, chemically and mass spectrometrically separated and purified and is fully embedded into the 180x180 µm2 Au-absorber of the ECHo MMCs. Resonance ionization at the RISIKO mass separator guarantees elemental and isotopic selectivity for ultra-pure 163Ho ion implantation with a sub millimeter beam spot size. The performance of the laser ion source and the implantation process was improved to minimize sample losses. On-line in-situ deposition of Au using pulsed laser deposition (PLD) ensures homogeneous 163Ho/Au layer formation in the implantation area. To verify the purity of the ECHo source material from production up to implantation and data taking a varity of different analytical techniques is applied, including γ-ray spectrometry, NAA, ICP-MS and RIMS.

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