Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 11: Neutrinophysik 1 (Neutrinomassen)

T 11.9: Vortrag

Montag, 27. März 2017, 18:50–19:05, VSH 17

Production, Separation and Implantation of ¹⁶³Ho for Electron Neutrino Mass Measurements — •Tom Kieck¹, Holger Dorrer¹, Christoph E. Düllmann¹, Klaus Eberhardt¹, Raphael Haas¹, Ulli Köster², Christoph Mokry¹, Jörg Runke¹, Sebastian Schmidt¹, Fabian Schneider¹, Leonard Winkelmann¹, and Klaus Wendt¹ for the ECHo collaboration — ¹Johannes Gutenberg-Universität, Mainz, Germany — ²Institut Laue-Langevin, Grenoble, France

The ECHo collaboration aims at measuring the electron neutrino mass by recording the spectrum following electron capture of ¹⁶³Ho using metallic magnetic calorimeters (MMC). Presently kBq amounts of the radioisotope ¹⁶³Ho were produced from enriched ¹⁶²Er in the ILL high flux nuclear reactor, chemical and mass spectrometric separated and embedded into 250x250 µm² Au-absorbers.

The application of resonance ionization at the RISIKO mass separator provides optimum elemental and isotopic selectivity for ultra-pure ¹⁶³Ho ion implantation. After improvement of efficiency and stability of laser ion source and mass separator, post focusing ion optics were installed and characterized for minimum loss implantation with sub millimeter beam spot size. An in-situ deposition of gold using the technique of pulsed laser deposition (PLD) generates a homogeneous ¹⁶³Ho/Au layer as absorber of the MMC.